解决关闭下载按钮时，下载按钮还显示问题

.editorconfig

@@ -1,555 +0,0 @@
-[*]
-charset = utf-8
-end_of_line = lf
-indent_size = 4
-indent_style = space
-insert_final_newline = false
-max_line_length = 120
-tab_width = 4
-ij_continuation_indent_size = 8
-ij_formatter_off_tag = @formatter:off
-ij_formatter_on_tag = @formatter:on
-ij_formatter_tags_enabled = false
-ij_smart_tabs = false
-ij_visual_guides = none
-ij_wrap_on_typing = false
-
-[*.java]
-ij_java_align_consecutive_assignments = false
-ij_java_align_consecutive_variable_declarations = false
-ij_java_align_group_field_declarations = false
-ij_java_align_multiline_annotation_parameters = false
-ij_java_align_multiline_array_initializer_expression = false
-ij_java_align_multiline_assignment = false
-ij_java_align_multiline_binary_operation = false
-ij_java_align_multiline_chained_methods = false
-ij_java_align_multiline_extends_list = false
-ij_java_align_multiline_for = true
-ij_java_align_multiline_method_parentheses = false
-ij_java_align_multiline_parameters = true
-ij_java_align_multiline_parameters_in_calls = false
-ij_java_align_multiline_parenthesized_expression = false
-ij_java_align_multiline_records = true
-ij_java_align_multiline_resources = true
-ij_java_align_multiline_ternary_operation = false
-ij_java_align_multiline_text_blocks = false
-ij_java_align_multiline_throws_list = false
-ij_java_align_subsequent_simple_methods = false
-ij_java_align_throws_keyword = false
-ij_java_align_types_in_multi_catch = true
-ij_java_annotation_parameter_wrap = off
-ij_java_array_initializer_new_line_after_left_brace = false
-ij_java_array_initializer_right_brace_on_new_line = false
-ij_java_array_initializer_wrap = off
-ij_java_assert_statement_colon_on_next_line = false
-ij_java_assert_statement_wrap = off
-ij_java_assignment_wrap = off
-ij_java_binary_operation_sign_on_next_line = false
-ij_java_binary_operation_wrap = off
-ij_java_blank_lines_after_anonymous_class_header = 0
-ij_java_blank_lines_after_class_header = 0
-ij_java_blank_lines_after_imports = 1
-ij_java_blank_lines_after_package = 1
-ij_java_blank_lines_around_class = 1
-ij_java_blank_lines_around_field = 0
-ij_java_blank_lines_around_field_in_interface = 0
-ij_java_blank_lines_around_initializer = 1
-ij_java_blank_lines_around_method = 1
-ij_java_blank_lines_around_method_in_interface = 1
-ij_java_blank_lines_before_class_end = 0
-ij_java_blank_lines_before_imports = 1
-ij_java_blank_lines_before_method_body = 0
-ij_java_blank_lines_before_package = 0
-ij_java_block_brace_style = end_of_line
-ij_java_block_comment_add_space = false
-ij_java_block_comment_at_first_column = true
-ij_java_builder_methods = none
-ij_java_call_parameters_new_line_after_left_paren = false
-ij_java_call_parameters_right_paren_on_new_line = false
-ij_java_call_parameters_wrap = off
-ij_java_case_statement_on_separate_line = true
-ij_java_catch_on_new_line = false
-ij_java_class_annotation_wrap = split_into_lines
-ij_java_class_brace_style = end_of_line
-ij_java_class_count_to_use_import_on_demand = 99
-ij_java_class_names_in_javadoc = 1
-ij_java_do_not_indent_top_level_class_members = false
-ij_java_do_not_wrap_after_single_annotation = false
-ij_java_do_not_wrap_after_single_annotation_in_parameter = false
-ij_java_do_while_brace_force = never
-ij_java_doc_add_blank_line_after_description = true
-ij_java_doc_add_blank_line_after_param_comments = false
-ij_java_doc_add_blank_line_after_return = false
-ij_java_doc_add_p_tag_on_empty_lines = true
-ij_java_doc_align_exception_comments = true
-ij_java_doc_align_param_comments = true
-ij_java_doc_do_not_wrap_if_one_line = false
-ij_java_doc_enable_formatting = true
-ij_java_doc_enable_leading_asterisks = true
-ij_java_doc_indent_on_continuation = false
-ij_java_doc_keep_empty_lines = true
-ij_java_doc_keep_empty_parameter_tag = true
-ij_java_doc_keep_empty_return_tag = true
-ij_java_doc_keep_empty_throws_tag = true
-ij_java_doc_keep_invalid_tags = true
-ij_java_doc_param_description_on_new_line = false
-ij_java_doc_preserve_line_breaks = false
-ij_java_doc_use_throws_not_exception_tag = true
-ij_java_else_on_new_line = false
-ij_java_enum_constants_wrap = off
-ij_java_extends_keyword_wrap = off
-ij_java_extends_list_wrap = off
-ij_java_field_annotation_wrap = split_into_lines
-ij_java_finally_on_new_line = false
-ij_java_for_brace_force = never
-ij_java_for_statement_new_line_after_left_paren = false
-ij_java_for_statement_right_paren_on_new_line = false
-ij_java_for_statement_wrap = off
-ij_java_generate_final_locals = false
-ij_java_generate_final_parameters = false
-ij_java_if_brace_force = never
-ij_java_imports_layout = $android.**,$androidx.**,$com.**,$junit.**,$net.**,$org.**,$java.**,$javax.**,$*,|,android.**,|,androidx.**,|,com.**,|,junit.**,|,net.**,|,org.**,|,java.**,|,javax.**,|,*,|
-ij_java_indent_case_from_switch = true
-ij_java_insert_inner_class_imports = false
-ij_java_insert_override_annotation = true
-ij_java_keep_blank_lines_before_right_brace = 2
-ij_java_keep_blank_lines_between_package_declaration_and_header = 2
-ij_java_keep_blank_lines_in_code = 2
-ij_java_keep_blank_lines_in_declarations = 2
-ij_java_keep_builder_methods_indents = false
-ij_java_keep_control_statement_in_one_line = true
-ij_java_keep_first_column_comment = true
-ij_java_keep_indents_on_empty_lines = false
-ij_java_keep_line_breaks = true
-ij_java_keep_multiple_expressions_in_one_line = false
-ij_java_keep_simple_blocks_in_one_line = false
-ij_java_keep_simple_classes_in_one_line = false
-ij_java_keep_simple_lambdas_in_one_line = false
-ij_java_keep_simple_methods_in_one_line = false
-ij_java_label_indent_absolute = false
-ij_java_label_indent_size = 0
-ij_java_lambda_brace_style = end_of_line
-ij_java_layout_static_imports_separately = true
-ij_java_line_comment_add_space = false
-ij_java_line_comment_add_space_on_reformat = false
-ij_java_line_comment_at_first_column = true
-ij_java_method_annotation_wrap = split_into_lines
-ij_java_method_brace_style = end_of_line
-ij_java_method_call_chain_wrap = off
-ij_java_method_parameters_new_line_after_left_paren = false
-ij_java_method_parameters_right_paren_on_new_line = false
-ij_java_method_parameters_wrap = off
-ij_java_modifier_list_wrap = false
-ij_java_multi_catch_types_wrap = normal
-ij_java_names_count_to_use_import_on_demand = 99
-ij_java_new_line_after_lparen_in_annotation = false
-ij_java_new_line_after_lparen_in_record_header = false
-ij_java_parameter_annotation_wrap = off
-ij_java_parentheses_expression_new_line_after_left_paren = false
-ij_java_parentheses_expression_right_paren_on_new_line = false
-ij_java_place_assignment_sign_on_next_line = false
-ij_java_prefer_longer_names = true
-ij_java_prefer_parameters_wrap = false
-ij_java_record_components_wrap = normal
-ij_java_repeat_synchronized = true
-ij_java_replace_instanceof_and_cast = false
-ij_java_replace_null_check = true
-ij_java_replace_sum_lambda_with_method_ref = true
-ij_java_resource_list_new_line_after_left_paren = false
-ij_java_resource_list_right_paren_on_new_line = false
-ij_java_resource_list_wrap = off
-ij_java_rparen_on_new_line_in_annotation = false
-ij_java_rparen_on_new_line_in_record_header = false
-ij_java_space_after_closing_angle_bracket_in_type_argument = false
-ij_java_space_after_colon = true
-ij_java_space_after_comma = true
-ij_java_space_after_comma_in_type_arguments = true
-ij_java_space_after_for_semicolon = true
-ij_java_space_after_quest = true
-ij_java_space_after_type_cast = true
-ij_java_space_before_annotation_array_initializer_left_brace = false
-ij_java_space_before_annotation_parameter_list = false
-ij_java_space_before_array_initializer_left_brace = false
-ij_java_space_before_catch_keyword = true
-ij_java_space_before_catch_left_brace = true
-ij_java_space_before_catch_parentheses = true
-ij_java_space_before_class_left_brace = true
-ij_java_space_before_colon = true
-ij_java_space_before_colon_in_foreach = true
-ij_java_space_before_comma = false
-ij_java_space_before_do_left_brace = true
-ij_java_space_before_else_keyword = true
-ij_java_space_before_else_left_brace = true
-ij_java_space_before_finally_keyword = true
-ij_java_space_before_finally_left_brace = true
-ij_java_space_before_for_left_brace = true
-ij_java_space_before_for_parentheses = true
-ij_java_space_before_for_semicolon = false
-ij_java_space_before_if_left_brace = true
-ij_java_space_before_if_parentheses = true
-ij_java_space_before_method_call_parentheses = false
-ij_java_space_before_method_left_brace = true
-ij_java_space_before_method_parentheses = false
-ij_java_space_before_opening_angle_bracket_in_type_parameter = false
-ij_java_space_before_quest = true
-ij_java_space_before_switch_left_brace = true
-ij_java_space_before_switch_parentheses = true
-ij_java_space_before_synchronized_left_brace = true
-ij_java_space_before_synchronized_parentheses = true
-ij_java_space_before_try_left_brace = true
-ij_java_space_before_try_parentheses = true
-ij_java_space_before_type_parameter_list = false
-ij_java_space_before_while_keyword = true
-ij_java_space_before_while_left_brace = true
-ij_java_space_before_while_parentheses = true
-ij_java_space_inside_one_line_enum_braces = false
-ij_java_space_within_empty_array_initializer_braces = false
-ij_java_space_within_empty_method_call_parentheses = false
-ij_java_space_within_empty_method_parentheses = false
-ij_java_spaces_around_additive_operators = true
-ij_java_spaces_around_annotation_eq = true
-ij_java_spaces_around_assignment_operators = true
-ij_java_spaces_around_bitwise_operators = true
-ij_java_spaces_around_equality_operators = true
-ij_java_spaces_around_lambda_arrow = true
-ij_java_spaces_around_logical_operators = true
-ij_java_spaces_around_method_ref_dbl_colon = false
-ij_java_spaces_around_multiplicative_operators = true
-ij_java_spaces_around_relational_operators = true
-ij_java_spaces_around_shift_operators = true
-ij_java_spaces_around_type_bounds_in_type_parameters = true
-ij_java_spaces_around_unary_operator = false
-ij_java_spaces_within_angle_brackets = false
-ij_java_spaces_within_annotation_parentheses = false
-ij_java_spaces_within_array_initializer_braces = false
-ij_java_spaces_within_braces = false
-ij_java_spaces_within_brackets = false
-ij_java_spaces_within_cast_parentheses = false
-ij_java_spaces_within_catch_parentheses = false
-ij_java_spaces_within_for_parentheses = false
-ij_java_spaces_within_if_parentheses = false
-ij_java_spaces_within_method_call_parentheses = false
-ij_java_spaces_within_method_parentheses = false
-ij_java_spaces_within_parentheses = false
-ij_java_spaces_within_record_header = false
-ij_java_spaces_within_switch_parentheses = false
-ij_java_spaces_within_synchronized_parentheses = false
-ij_java_spaces_within_try_parentheses = false
-ij_java_spaces_within_while_parentheses = false
-ij_java_special_else_if_treatment = true
-ij_java_subclass_name_suffix = Impl
-ij_java_ternary_operation_signs_on_next_line = false
-ij_java_ternary_operation_wrap = off
-ij_java_test_name_suffix = Test
-ij_java_throws_keyword_wrap = off
-ij_java_throws_list_wrap = off
-ij_java_use_external_annotations = false
-ij_java_use_fq_class_names = false
-ij_java_use_relative_indents = false
-ij_java_use_single_class_imports = true
-ij_java_variable_annotation_wrap = off
-ij_java_visibility = public
-ij_java_while_brace_force = never
-ij_java_while_on_new_line = false
-ij_java_wrap_comments = false
-ij_java_wrap_first_method_in_call_chain = false
-ij_java_wrap_long_lines = false
-
-[.editorconfig]
-ij_editorconfig_align_group_field_declarations = false
-ij_editorconfig_space_after_colon = false
-ij_editorconfig_space_after_comma = true
-ij_editorconfig_space_before_colon = false
-ij_editorconfig_space_before_comma = false
-ij_editorconfig_spaces_around_assignment_operators = true
-
-[{*.ant,*.fxml,*.jhm,*.jnlp,*.jrxml,*.rng,*.tld,*.wsdl,*.xml,*.xsd,*.xsl,*.xslt,*.xul}]
-ij_continuation_indent_size = 4
-ij_xml_align_attributes = false
-ij_xml_align_text = false
-ij_xml_attribute_wrap = normal
-ij_xml_block_comment_add_space = false
-ij_xml_block_comment_at_first_column = true
-ij_xml_keep_blank_lines = 2
-ij_xml_keep_indents_on_empty_lines = false
-ij_xml_keep_line_breaks = false
-ij_xml_keep_line_breaks_in_text = true
-ij_xml_keep_whitespaces = false
-ij_xml_keep_whitespaces_around_cdata = preserve
-ij_xml_keep_whitespaces_inside_cdata = false
-ij_xml_line_comment_at_first_column = true
-ij_xml_space_after_tag_name = false
-ij_xml_space_around_equals_in_attribute = false
-ij_xml_space_inside_empty_tag = true
-ij_xml_text_wrap = normal
-ij_xml_use_custom_settings = true
-
-[{*.gant,*.groovy,*.gy}]
-ij_groovy_align_group_field_declarations = false
-ij_groovy_align_multiline_array_initializer_expression = false
-ij_groovy_align_multiline_assignment = false
-ij_groovy_align_multiline_binary_operation = false
-ij_groovy_align_multiline_chained_methods = false
-ij_groovy_align_multiline_extends_list = false
-ij_groovy_align_multiline_for = true
-ij_groovy_align_multiline_list_or_map = true
-ij_groovy_align_multiline_method_parentheses = false
-ij_groovy_align_multiline_parameters = true
-ij_groovy_align_multiline_parameters_in_calls = false
-ij_groovy_align_multiline_resources = true
-ij_groovy_align_multiline_ternary_operation = false
-ij_groovy_align_multiline_throws_list = false
-ij_groovy_align_named_args_in_map = true
-ij_groovy_align_throws_keyword = false
-ij_groovy_array_initializer_new_line_after_left_brace = false
-ij_groovy_array_initializer_right_brace_on_new_line = false
-ij_groovy_array_initializer_wrap = off
-ij_groovy_assert_statement_wrap = off
-ij_groovy_assignment_wrap = off
-ij_groovy_binary_operation_wrap = off
-ij_groovy_blank_lines_after_class_header = 0
-ij_groovy_blank_lines_after_imports = 1
-ij_groovy_blank_lines_after_package = 1
-ij_groovy_blank_lines_around_class = 1
-ij_groovy_blank_lines_around_field = 0
-ij_groovy_blank_lines_around_field_in_interface = 0
-ij_groovy_blank_lines_around_method = 1
-ij_groovy_blank_lines_around_method_in_interface = 1
-ij_groovy_blank_lines_before_imports = 1
-ij_groovy_blank_lines_before_method_body = 0
-ij_groovy_blank_lines_before_package = 0
-ij_groovy_block_brace_style = end_of_line
-ij_groovy_block_comment_add_space = false
-ij_groovy_block_comment_at_first_column = true
-ij_groovy_call_parameters_new_line_after_left_paren = false
-ij_groovy_call_parameters_right_paren_on_new_line = false
-ij_groovy_call_parameters_wrap = off
-ij_groovy_catch_on_new_line = false
-ij_groovy_class_annotation_wrap = split_into_lines
-ij_groovy_class_brace_style = end_of_line
-ij_groovy_class_count_to_use_import_on_demand = 5
-ij_groovy_do_while_brace_force = never
-ij_groovy_else_on_new_line = false
-ij_groovy_enable_groovydoc_formatting = true
-ij_groovy_enum_constants_wrap = off
-ij_groovy_extends_keyword_wrap = off
-ij_groovy_extends_list_wrap = off
-ij_groovy_field_annotation_wrap = split_into_lines
-ij_groovy_finally_on_new_line = false
-ij_groovy_for_brace_force = never
-ij_groovy_for_statement_new_line_after_left_paren = false
-ij_groovy_for_statement_right_paren_on_new_line = false
-ij_groovy_for_statement_wrap = off
-ij_groovy_if_brace_force = never
-ij_groovy_import_annotation_wrap = 2
-ij_groovy_imports_layout = *,|,javax.**,java.**,|,$*
-ij_groovy_indent_case_from_switch = true
-ij_groovy_indent_label_blocks = true
-ij_groovy_insert_inner_class_imports = false
-ij_groovy_keep_blank_lines_before_right_brace = 2
-ij_groovy_keep_blank_lines_in_code = 2
-ij_groovy_keep_blank_lines_in_declarations = 2
-ij_groovy_keep_control_statement_in_one_line = true
-ij_groovy_keep_first_column_comment = true
-ij_groovy_keep_indents_on_empty_lines = false
-ij_groovy_keep_line_breaks = true
-ij_groovy_keep_multiple_expressions_in_one_line = false
-ij_groovy_keep_simple_blocks_in_one_line = false
-ij_groovy_keep_simple_classes_in_one_line = true
-ij_groovy_keep_simple_lambdas_in_one_line = true
-ij_groovy_keep_simple_methods_in_one_line = true
-ij_groovy_label_indent_absolute = false
-ij_groovy_label_indent_size = 0
-ij_groovy_lambda_brace_style = end_of_line
-ij_groovy_layout_static_imports_separately = true
-ij_groovy_line_comment_add_space = false
-ij_groovy_line_comment_add_space_on_reformat = false
-ij_groovy_line_comment_at_first_column = true
-ij_groovy_method_annotation_wrap = split_into_lines
-ij_groovy_method_brace_style = end_of_line
-ij_groovy_method_call_chain_wrap = off
-ij_groovy_method_parameters_new_line_after_left_paren = false
-ij_groovy_method_parameters_right_paren_on_new_line = false
-ij_groovy_method_parameters_wrap = off
-ij_groovy_modifier_list_wrap = false
-ij_groovy_names_count_to_use_import_on_demand = 3
-ij_groovy_packages_to_use_import_on_demand = java.awt.*,javax.swing.*
-ij_groovy_parameter_annotation_wrap = off
-ij_groovy_parentheses_expression_new_line_after_left_paren = false
-ij_groovy_parentheses_expression_right_paren_on_new_line = false
-ij_groovy_prefer_parameters_wrap = false
-ij_groovy_resource_list_new_line_after_left_paren = false
-ij_groovy_resource_list_right_paren_on_new_line = false
-ij_groovy_resource_list_wrap = off
-ij_groovy_space_after_assert_separator = true
-ij_groovy_space_after_colon = true
-ij_groovy_space_after_comma = true
-ij_groovy_space_after_comma_in_type_arguments = true
-ij_groovy_space_after_for_semicolon = true
-ij_groovy_space_after_quest = true
-ij_groovy_space_after_type_cast = true
-ij_groovy_space_before_annotation_parameter_list = false
-ij_groovy_space_before_array_initializer_left_brace = false
-ij_groovy_space_before_assert_separator = false
-ij_groovy_space_before_catch_keyword = true
-ij_groovy_space_before_catch_left_brace = true
-ij_groovy_space_before_catch_parentheses = true
-ij_groovy_space_before_class_left_brace = true
-ij_groovy_space_before_closure_left_brace = true
-ij_groovy_space_before_colon = true
-ij_groovy_space_before_comma = false
-ij_groovy_space_before_do_left_brace = true
-ij_groovy_space_before_else_keyword = true
-ij_groovy_space_before_else_left_brace = true
-ij_groovy_space_before_finally_keyword = true
-ij_groovy_space_before_finally_left_brace = true
-ij_groovy_space_before_for_left_brace = true
-ij_groovy_space_before_for_parentheses = true
-ij_groovy_space_before_for_semicolon = false
-ij_groovy_space_before_if_left_brace = true
-ij_groovy_space_before_if_parentheses = true
-ij_groovy_space_before_method_call_parentheses = false
-ij_groovy_space_before_method_left_brace = true
-ij_groovy_space_before_method_parentheses = false
-ij_groovy_space_before_quest = true
-ij_groovy_space_before_record_parentheses = false
-ij_groovy_space_before_switch_left_brace = true
-ij_groovy_space_before_switch_parentheses = true
-ij_groovy_space_before_synchronized_left_brace = true
-ij_groovy_space_before_synchronized_parentheses = true
-ij_groovy_space_before_try_left_brace = true
-ij_groovy_space_before_try_parentheses = true
-ij_groovy_space_before_while_keyword = true
-ij_groovy_space_before_while_left_brace = true
-ij_groovy_space_before_while_parentheses = true
-ij_groovy_space_in_named_argument = true
-ij_groovy_space_in_named_argument_before_colon = false
-ij_groovy_space_within_empty_array_initializer_braces = false
-ij_groovy_space_within_empty_method_call_parentheses = false
-ij_groovy_spaces_around_additive_operators = true
-ij_groovy_spaces_around_assignment_operators = true
-ij_groovy_spaces_around_bitwise_operators = true
-ij_groovy_spaces_around_equality_operators = true
-ij_groovy_spaces_around_lambda_arrow = true
-ij_groovy_spaces_around_logical_operators = true
-ij_groovy_spaces_around_multiplicative_operators = true
-ij_groovy_spaces_around_regex_operators = true
-ij_groovy_spaces_around_relational_operators = true
-ij_groovy_spaces_around_shift_operators = true
-ij_groovy_spaces_within_annotation_parentheses = false
-ij_groovy_spaces_within_array_initializer_braces = false
-ij_groovy_spaces_within_braces = true
-ij_groovy_spaces_within_brackets = false
-ij_groovy_spaces_within_cast_parentheses = false
-ij_groovy_spaces_within_catch_parentheses = false
-ij_groovy_spaces_within_for_parentheses = false
-ij_groovy_spaces_within_gstring_injection_braces = false
-ij_groovy_spaces_within_if_parentheses = false
-ij_groovy_spaces_within_list_or_map = false
-ij_groovy_spaces_within_method_call_parentheses = false
-ij_groovy_spaces_within_method_parentheses = false
-ij_groovy_spaces_within_parentheses = false
-ij_groovy_spaces_within_switch_parentheses = false
-ij_groovy_spaces_within_synchronized_parentheses = false
-ij_groovy_spaces_within_try_parentheses = false
-ij_groovy_spaces_within_tuple_expression = false
-ij_groovy_spaces_within_while_parentheses = false
-ij_groovy_special_else_if_treatment = true
-ij_groovy_ternary_operation_wrap = off
-ij_groovy_throws_keyword_wrap = off
-ij_groovy_throws_list_wrap = off
-ij_groovy_use_flying_geese_braces = false
-ij_groovy_use_fq_class_names = false
-ij_groovy_use_fq_class_names_in_javadoc = true
-ij_groovy_use_relative_indents = false
-ij_groovy_use_single_class_imports = true
-ij_groovy_variable_annotation_wrap = off
-ij_groovy_while_brace_force = never
-ij_groovy_while_on_new_line = false
-ij_groovy_wrap_chain_calls_after_dot = false
-ij_groovy_wrap_long_lines = false
-
-[{*.kt,*.kts,*.main.kts}]
-ij_kotlin_align_in_columns_case_branch = false
-ij_kotlin_align_multiline_binary_operation = false
-ij_kotlin_align_multiline_extends_list = false
-ij_kotlin_align_multiline_method_parentheses = false
-ij_kotlin_align_multiline_parameters = true
-ij_kotlin_align_multiline_parameters_in_calls = false
-ij_kotlin_allow_trailing_comma = false
-ij_kotlin_allow_trailing_comma_on_call_site = false
-ij_kotlin_assignment_wrap = normal
-ij_kotlin_blank_lines_after_class_header = 0
-ij_kotlin_blank_lines_around_block_when_branches = 0
-ij_kotlin_blank_lines_before_declaration_with_comment_or_annotation_on_separate_line = 1
-ij_kotlin_block_comment_add_space = false
-ij_kotlin_block_comment_at_first_column = true
-ij_kotlin_call_parameters_new_line_after_left_paren = true
-ij_kotlin_call_parameters_right_paren_on_new_line = true
-ij_kotlin_call_parameters_wrap = on_every_item
-ij_kotlin_catch_on_new_line = false
-ij_kotlin_class_annotation_wrap = split_into_lines
-ij_kotlin_code_style_defaults = KOTLIN_OFFICIAL
-ij_kotlin_continuation_indent_for_chained_calls = false
-ij_kotlin_continuation_indent_for_expression_bodies = false
-ij_kotlin_continuation_indent_in_argument_lists = false
-ij_kotlin_continuation_indent_in_elvis = false
-ij_kotlin_continuation_indent_in_if_conditions = false
-ij_kotlin_continuation_indent_in_parameter_lists = false
-ij_kotlin_continuation_indent_in_supertype_lists = false
-ij_kotlin_else_on_new_line = false
-ij_kotlin_enum_constants_wrap = off
-ij_kotlin_extends_list_wrap = normal
-ij_kotlin_field_annotation_wrap = split_into_lines
-ij_kotlin_finally_on_new_line = false
-ij_kotlin_if_rparen_on_new_line = true
-ij_kotlin_import_nested_classes = false
-ij_kotlin_imports_layout = *,java.**,javax.**,kotlin.**,^
-ij_kotlin_insert_whitespaces_in_simple_one_line_method = true
-ij_kotlin_keep_blank_lines_before_right_brace = 2
-ij_kotlin_keep_blank_lines_in_code = 2
-ij_kotlin_keep_blank_lines_in_declarations = 2
-ij_kotlin_keep_first_column_comment = true
-ij_kotlin_keep_indents_on_empty_lines = false
-ij_kotlin_keep_line_breaks = true
-ij_kotlin_lbrace_on_next_line = false
-ij_kotlin_line_comment_add_space = false
-ij_kotlin_line_comment_add_space_on_reformat = false
-ij_kotlin_line_comment_at_first_column = true
-ij_kotlin_method_annotation_wrap = split_into_lines
-ij_kotlin_method_call_chain_wrap = normal
-ij_kotlin_method_parameters_new_line_after_left_paren = true
-ij_kotlin_method_parameters_right_paren_on_new_line = true
-ij_kotlin_method_parameters_wrap = on_every_item
-ij_kotlin_name_count_to_use_star_import = 5
-ij_kotlin_name_count_to_use_star_import_for_members = 3
-ij_kotlin_packages_to_use_import_on_demand = java.util.*,kotlinx.android.synthetic.**,io.ktor.**
-ij_kotlin_parameter_annotation_wrap = off
-ij_kotlin_space_after_comma = true
-ij_kotlin_space_after_extend_colon = true
-ij_kotlin_space_after_type_colon = true
-ij_kotlin_space_before_catch_parentheses = true
-ij_kotlin_space_before_comma = false
-ij_kotlin_space_before_extend_colon = true
-ij_kotlin_space_before_for_parentheses = true
-ij_kotlin_space_before_if_parentheses = true
-ij_kotlin_space_before_lambda_arrow = true
-ij_kotlin_space_before_type_colon = false
-ij_kotlin_space_before_when_parentheses = true
-ij_kotlin_space_before_while_parentheses = true
-ij_kotlin_spaces_around_additive_operators = true
-ij_kotlin_spaces_around_assignment_operators = true
-ij_kotlin_spaces_around_equality_operators = true
-ij_kotlin_spaces_around_function_type_arrow = true
-ij_kotlin_spaces_around_logical_operators = true
-ij_kotlin_spaces_around_multiplicative_operators = true
-ij_kotlin_spaces_around_range = false
-ij_kotlin_spaces_around_relational_operators = true
-ij_kotlin_spaces_around_unary_operator = false
-ij_kotlin_spaces_around_when_arrow = true
-ij_kotlin_use_custom_formatting_for_modifiers = true
-ij_kotlin_variable_annotation_wrap = off
-ij_kotlin_while_on_new_line = false
-ij_kotlin_wrap_elvis_expressions = 1
-ij_kotlin_wrap_expression_body_functions = 1
-ij_kotlin_wrap_first_method_in_call_chain = false

.gitignore

@@ -1,14 +1,8 @@
-.idea/
+/.idea
+.idea/misc.xml
 *.iml
-.gradle/
-local.properties
-# sign.properties
+.gradle
+/local.properties
 .DS_Store
-captures/
-build/
-release-app/
-test-app/
-scripts/apk-channel/
-app/src/test/java/com/gh/gamecenter
-app/src/main/assets-debug/
-app/src/main/assets-release/
+/build
+/captures

.gitlab-ci.yml

@@ -1,159 +0,0 @@
-# commit_sha 文件记录上一次成功流水线的commit sha，用于定时计划检测是否有新代码提交，有就执行流水线，没有就终止流水线
-cache:
-# 不同的分支采用不同的 cache，防止分支之间相互影响
-   key: "${CI_COMMIT_REF_SLUG}_commit_sha"
-   paths:
-     - commit_sha
-   policy: pull
-
-# 将打包&发送apk包邮件job 和代码分析job 并行执行
-stages:
-  - build&analyze
-  - oss-upload&send-email
-  - ci_sonar_mail
-
-# 阻止了 合并请求 或 push（分支和标签）的流水线。 最后的 when: always 规则运行所有其他流水线类型，包括定时计划流水线。
-workflow:
- rules:
-   - if: '$CI_PIPELINE_SOURCE == "push"'
-     when: always
-   - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
-     when: never
-   - when: always
-
-before_script:
-   # 检查是否存在 commit_sha 文件
-   - if [ -f commit_sha ]; then cat commit_sha; else echo "0000000" > commit_sha; fi
-   - export BEFORE_COMMIT_SHA=$(cat commit_sha)
-   # 比较commit sha ,若与上一次成功流水线的commit sha 相同，则退出流水线
-   - if [ "$CI_COMMIT_SHA" == "$BEFORE_COMMIT_SHA" ] && [ "$CI_PIPELINE_SOURCE" != "web" ]; then exit 137; fi
-
-# 使用 .post 阶段使作业在流水线的末尾运行。.post 始终是流水线的最后阶段。
-change_commit:
-   tags:
-     - offline-test
-   stage: .post
-   # 此job 跳过拉取git代码
-   variables:
-     GIT_STRATEGY: none
-   script:
-     # 更新 commit_sha
-     - if [ "$CI_COMMIT_SHA" != "$BEFORE_COMMIT_SHA" ]; then echo $CI_COMMIT_SHA > commit_sha; fi
-   cache:
-     # 不同的分支采用不同的 cache，防止分支之间相互影响
-     key: "${CI_COMMIT_REF_SLUG}_commit_sha"
-     paths:
-       - commit_sha
-     policy: pull-push
-   allow_failure:
-     exit_codes: 137
-
-android_build:
-  tags:
-    # - local-runner
-    - offline-test
-  stage: build&analyze
-  image: hub.shanqu.cc/library/ci-android:jdk11-sdk31-33
-  resource_group: android_build
-  variables:
-    GIT_SUBMODULE_STRATEGY: recursive
-    KUBERNETES_CPU_LIMIT: "10"
-  script:
-    - export GRADLE_USER_HOME=/home/gitlab-runner/ci-build-cache/$CI_PROJECT_PATH/.gradle
-    - chmod +x ./gradlew
-    - ./scripts/jenkins_build.sh $CI_COMMIT_REF_NAME $BEFORE_COMMIT_SHA $CI_COMMIT_SHA
-  #设置打包后的产物，用于job之间共享
-  artifacts:
-      paths:
-          - app/build/tmp/*.apk
-      expire_in: 48 hrs       # 指定附件上载后保存的时间24h，默认永久在Gitlab保存
-  allow_failure:
-    exit_codes: 137
-  only:
-    - dev
-    - release
-
-# 代码检查
-sonarqube_analysis:
-   tags:
-     - offline-test
-   stage: build&analyze
-   image: hub.shanqu.cc/library/sonar-scanner-cli:latest
-   dependencies: []    #禁止传递来的artifact
-   script:
-     ## 获取项目的一级组和二级组和项目名作为projectKey，例如projectKey=platform-backend-eci-monitor
-     - group=`echo $CI_PROJECT_PATH | sed 's#/#-#g'`
-     - sonar-scanner
-       -Dsonar.host.url=http://sonarqube-server.sonarqube:9000/
-       -Dsonar.login=be43de7264ce4c4766eb0c020373c3e74e6df257
-       -Dsonar.jacoco.reportPaths=target/jacoco.exec
-       -Dsonar.projectKey=$group
-       -Dsonar.projectName=$CI_PROJECT_PATH
-       -Dsonar.sourceEncoding=UTF-8
-       -Dsonar.exclusions=**/vendor/**,**/errcode/**
-       -Dsonar.gitlab.project_id=$CI_PROJECT_ID
-       -Dsonar.gitlab.commit_sha=$CI_COMMIT_SHA
-       -Dsonar.gitlab.ref_name=$CI_COMMIT_REF_NAME
-       -Dsonar.gitlab.ci_merge_request_iid=$CI_MERGE_REQUEST_IID
-       -Dsonar.gitlab.merge_request_discussion=true
-       -Dsonar.java.binaries=.
-       -Dsonar.branch.name=$CI_COMMIT_REF_NAME
-   allow_failure:
-     exit_codes: 137
-   only:
-     - dev
-     - release
-
-## 发送简易检测结果报告
-send_sonar_report:
-   tags:
-     - offline-test
-   stage: ci_sonar_mail
-   image: hub.shanqu.cc/library/docker:latest
-   # 此job 跳过拉取git代码
-   variables:
-     GIT_STRATEGY: none
-   script:
-     - group=`echo $CI_PROJECT_PATH | sed 's#/#-#g'`
-     - docker run -e PROJECTKEY=$group -e EMAIL=$GITLAB_USER_EMAIL -e BRANCH=$CI_COMMIT_REF_NAME --name send-email --rm hub.shanqu.cc/platform/send-sonar-report:latest
-   allow_failure:
-     exit_codes: 137
-   only:
-     - dev
-     - release
-
-oss-upload&send-email:
-    tags:
-        - sysadm-devops
-    stage: oss-upload&send-email
-    image: hub.shanqu.cc/devops/android-apk-oss-upload:latest
-    id_tokens:
-      VAULT_ID_TOKEN:
-        aud: https://vault.shanqu.cc
-    variables:
-        GIT_STRATEGY: none
-        VAULT_ADDR: https://vault.shanqu.cc                         # 固定值
-        VAULT_SECRET_PATH: prod/devops/android-apk-oss-upload       # 固定值
-        VAULT_ROLE: android-apk-oss-upload                          # 固定值
-        ENDPOINT: "tos-cn-guangzhou.ivolces.com"                    # 固定值
-        BUCKET: "sysadm-public"                                     # 固定值
-        FILE_PATH: "app/build/tmp/"                                 # APK 存放路径
-        Email_To_List: $EMAIL_TO_LIST                               # 邮件接受人列表
-        Email_Title: "光环助手 $CI_COMMIT_BRANCH"                    # 邮件标题
-        PIPELINE_ID: $CI_PIPELINE_ID                                # 流水线id
-        COMMIT_BRANCH: $CI_COMMIT_BRANCH                            # 提交分支
-        MAIL_MESSAGE: "[$CI_COMMIT_AUTHOR] $CI_COMMIT_MESSAGE"
-    needs:
-        - job: android_build
-          artifacts: true
-    script:
-        ### 绑定上传参数 ###
-
-        - export OSS_PATH="release/dev/${CI_PROJECT_NAME}/$(date "+%Y/%m/%d")"
-        ### 开启上传 ###
-        - /usr/local/bin/python /upload.py
-        ### 发送邮件
-        - /usr/local/bin/python /ci-android-mail-jira-comment.py
-    only:
-        - dev
-        - release

.gitmodules

@@ -1,13 +0,0 @@
-[submodule "libraries/LGLibrary"]
-	path = libraries/LGLibrary
-	url = ../../../android/common-library.git
-	branch = master
-[submodule "vspace-bridge"]
-	path = vspace-bridge
-	url = ../../../cwzs/android/vspace-bridge.git
-[submodule "ndownload"]
-	path = ndownload
-	url = ../../../android/ndownload.git
-[submodule "vasdk"]
-	path = vasdk
-	url = ../../../sdg/android/vasdk.git

.idea/.name

@@ -0,0 +1 @@
+GH-ASSISTv1.45

.idea/compiler.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <resourceExtensions />
+    <wildcardResourcePatterns>
+      <entry name="!?*.java" />
+      <entry name="!?*.form" />
+      <entry name="!?*.class" />
+      <entry name="!?*.groovy" />
+      <entry name="!?*.scala" />
+      <entry name="!?*.flex" />
+      <entry name="!?*.kt" />
+      <entry name="!?*.clj" />
+      <entry name="!?*.aj" />
+    </wildcardResourcePatterns>
+    <annotationProcessing>
+      <profile default="true" name="Default" enabled="false">
+        <processorPath useClasspath="true" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/copyright/profiles_settings.xml

@@ -0,0 +1,3 @@
+<component name="CopyrightManager">
+  <settings default="" />
+</component>

.idea/encodings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="PROJECT" charset="UTF-8" />
+  </component>
+</project>

.idea/gradle.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="$APPLICATION_HOME_DIR$/gradle/gradle-2.10" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="myModules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="EntryPointsManager">
+    <entry_points version="2.0" />
+  </component>
+  <component name="NullableNotNullManager">
+    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
+    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
+    <option name="myNullables">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+        </list>
+      </value>
+    </option>
+    <option name="myNotNulls">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+        </list>
+      </value>
+    </option>
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="false">
+    <OptionsSetting value="true" id="Add" />
+    <OptionsSetting value="true" id="Remove" />
+    <OptionsSetting value="true" id="Checkout" />
+    <OptionsSetting value="true" id="Update" />
+    <OptionsSetting value="true" id="Status" />
+    <OptionsSetting value="true" id="Edit" />
+    <ConfirmationsSetting value="0" id="Add" />
+    <ConfirmationsSetting value="0" id="Remove" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.7" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/GH-ASSISTv1.45.iml" filepath="$PROJECT_DIR$/GH-ASSISTv1.45.iml" />
+      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
+    </modules>
+  </component>
+</project>

.idea/runConfigurations.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

CHANGELOG.md

@@ -1,89 +0,0 @@
-# 版本升级备忘
-
-### Ver 2.5
-* 此处写本次更新所做的业务和代码修改
-
-### Ver 2.6
-* xx
-
-### Ver 3.0
-* 升级账号系统(登录流程/用户信息相关/用户账号相关操作(评论,礼包...))
-* 新增收藏功能(文章/工具箱)
-* 删除用户相关的所有本地数据库
-* 重做总开服表
-* 重做首页插件化模块
-* 礼包重复领取机制改变(可重复领取的礼包,领取后立刻显示再领一个/再淘一个)
-* 游戏下载平台面板修改(加快弹出速度,不再读取本地平台图片)
-* 接入bugly(tinker)
-
-### VER 3.1
-### VER 3.2
-### VER 3.3
-### VER 3.4
-### VER 3.5
-
-### Ver 3.6
-* 首页游戏增加预览骨架,游戏ITEM样式微调和开服标签
-* 首页问答增加关注页面
-* 重构游戏更新管理(游戏更新/插件化/已安装的游戏),具体细节参考PackageRepository & PackageViewModel
-* 重构APP更新管理(已VersionVode为更新基准,小版本更新改为光环后台控制)
-  - 删除TINKER_VERISON_NAME
-  - tinker打包方式变更(以小版本作为Base包,防止与数据后台小版本更新发生冲突)
-* 社区增加版主功能(版主可以对存在的相关内容进行修改/隐藏操作,内容包括问题/回答/回答评论)
-* 社区互动引导优化(问答推荐增加`推荐关注`,回答详情增加一些交互动效)
-
-### Ver 3.6.1
-* 可以后台控制关闭资讯功能
-* 版块、分类、专题详情、游戏详情、礼包详情增加预览骨架
-* 下载按钮状态可以通过接口屏蔽相应的包
-
-### Ver 3.6.2
-* 资讯/问答入口和插件功能线上控制(不可逆)
-* 首页不显示已安装的游戏
-* 插件求版本功能增加内部跳转
-* 下载面板增加公告和版本说明功能
-* 接入腾讯`广点通`(广告)
-
-### ver 3.6.3
-* 社区搜索修改
-  - 增加 `文章/用户` 模块
-  - 增加 `搜索置顶` 功能
-* 回答详情/社区文章详情修改
-  - 支持文案样式(加粗/斜体/删除线)和段落样式(引用/标题)
-  - 支持关闭评论功能
-  - 回答详情新增上下切换回答
-* 社区编辑框(回答/文章)修改
-  - 支持批量插入图片(使用知乎Matisse实现)
-  - 新增插入特殊样式,文案样式(加粗/斜体/删除线)和段落样式(引用/标题)
-* 编辑框部分 JS/CSS 使用远程文件
-
-### ver 3.6.4
-* 增加浏览记录(回答/文章/资讯/游戏)
-* 回答/社区文章 增加反对功能
-* 社区编辑框增加插入文章/回答/游戏
-  - 低版本兼容方案: 插入的样式默认隐藏,只有在3.6.4及以上才会显示
-* 游戏详情评分模块增加`小编评论`区域以及样式修改
-* 游戏评分增加回复功能
-
-### var 3.6.5
-* 以补丁方式向外推出，并没有增加需求，只是单纯的修BUG
-
-### var 3.6.6
-* 游戏详情:
-  - 支持修改评分
-  - 评分列表增加排序/过滤功能
-  - 增加弹出系统
-* 社区相关:
-  - 选择社区页面重做
-  - 首页社区推荐增加推荐入口
-  - 首页社区问题模块改版,名称改为全部,去除问题分类(统一为问题列表),增加社区文章列表
-* 游戏搜索默认页面改版
-* 权限系统更改,不授权也可以进去App,申请权限细分到功能(用到某个功能时才需要强制授予权限)
-* 增加隐私系统
-* 增加游戏预约功能
-* 增加标签详情模块
-* 进入今日头条广告SDK
-* 图片上传压缩机制优化
-  - 支持从后台修改上传配置(本该在早些版本实现,由于代码问题无法引用后台配置)
-  - 对压缩失败是进行catch(由于后台对宽高配置放宽,很容易发生OOM),失败后直接上传原图(这步可能会出现问题)
-* 游戏相关UI修改

Dockerfile

@@ -1,15 +0,0 @@
-FROM openjdk:11-jdk
-WORKDIR /project
-SHELL ["/bin/bash", "-c"]
-#配置SDK环境变量
-ENV ANDROID_SDK_ROOT /usr/lib/sdk
-ENV ANDROID_HOME /usr/lib/sdk
-ENV PATH $ANDROID_SDK_ROOT:$PATH
-ENV PATH=$PATH:${ANDROID_HOME}/cmdline-tools/cmdline-tools/bin/
-ENV GRADLE_USER_HOME /project/.gradle
-RUN source ~/.bashrc
-RUN sed -i "s@http://\(deb\|security\).debian.org@https://mirrors.aliyun.com@g" /etc/apt/sources.list \
-    && apt-get --quiet update --yes \
-    && apt-get --quiet install --yes lib32stdc++6 lib32z1 libncurses5 util-linux bash tzdata librdkafka-dev pkgconf \
-    && rm -rf /var/lib/apt/lists/*
-COPY .gradle /project/.gradle

README.md

@@ -1,47 +0,0 @@
-# 光环助手Android客户端
-
-### 概述
-
-光环助手Android客户端目前使用 Kotlin 作为主要开发语言，以 MVVM 作为参考架构模式进行开发
-
-### 约束
-
-为编写易读易维护且较健壮的代码，可参考以下约束
-
-1. 尽量将逻辑代码放置于 ViewModel 中，View 中只执行 UI 操作
-2. 尽量使 View 在被销毁之后仍能恢复状态，处理方式可参考 [保存界面状态](https://developer.android.com/topic/libraries/architecture/saving-states)
-3. 尽量参考原有文件结构及命名规范，即以 大模块 - 小模块 的形式生成包关系
-4. 遵循最小改动原则，在提交代码前务必先检查变动的代码，尽量以可控的变动规模来构成一个 commit ，以便日后追踪问题
-5. Commit message 提交规范可参考 [Conventional Commits](https://www.conventionalcommits.org/zh-hans/v1.0.0/)
-6. 代码规范可参考 [AOSP Java 风格](https://source.android.com/setup/contribute/code-style)
-7. 尽量使用 Kotlin 来写新文件
-8. 不要使用 DataBinding
-9. Commit 前请确保不带入非项目必须文件，可手动修改 [.gitignore](https://stackoverflow.com/questions/8527597/how-do-i-ignore-files-in-a-directory-in-git) 文件忽略
-10. 优先使用 ViewBinding 获取 View 对象
-11. No AsyncTask!
-
-### 公用部分
-
-本项目使用 LiveData 实现了一个简单通用的基础列表分页功能，具体可见 `ListFragment`, `ListViewModel` 等类，理想情况下只需少量代码即可新建一个简单分页列表
-
-### 首次拉取项目代码
-
-`git clone -b dev git@git.shanqu.cc:halo/android/assistant-android.git --recursive`
-
-### git 版本管理
-
-本项目使用简化版的 git flow 来管理分支，细节请看 [光环安卓简单 git 规范](https://git.shanqu.cc/halo/android/assistant-android/-/wikis/%E5%85%89%E7%8E%AF%E5%AE%89%E5%8D%93%E7%AE%80%E5%8D%95-git-%E8%A7%84%E8%8C%83)
-
-### 图片资源配置
-
-* 新增图片资源时，默认只添加最高规格的 xxxhdpi 文件
-* 新增图片资源时，需要将其转换为 .webp 格式 (包括含透明图层的图片，默认质量为90%) (转换后体积变大的文件除外)
-
-### 第三方appkey等配置
-
-* 修改 `gradle.properties` 文件将各种key填入其中，实现统一管理
-* 通过 gradle 文件内的 resValue/buildConfigField/manifestPlaceHolder 方式实现编译期间修改，具体情况请参考 ``./build.gradle`` 和 ``./app/build.gradle`` 配置
-
-### 混淆配置
-
-* 本项目默认使用 R8 作为混淆工具，往 proguard-rules.txt 添加 proguard 新配置项时请检查可用性(如语法等)

app/build.gradle

@@ -1,665 +1,127 @@
-// This comment exists for a reason, do not delete
 apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android' // kotlin
-apply plugin: 'kotlin-parcelize'
-apply plugin: 'kotlin-kapt'
-
-import groovy.xml.XmlUtil
 
 android {
-
-    String CONFIG_ID = ""
-    String FIRST_LAUNCH = ""
-    String SDK_VERSION = ""
-    String SDK_APP_ID = ""
-    String SDK_APP_NAME = ""
-    boolean USE_DEFAULT_CHANNEL_SDK = true
-    int ACTIVATE_REPORTING_RATIO = 100
-
-    buildFeatures {
-        viewBinding true
-        dataBinding true
-    }
-
-    compileOptions {
-        coreLibraryDesugaringEnabled true
-
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
-
-    dexOptions {
-//        jumboMode = true
-        javaMaxHeapSize "4g"
-        preDexLibraries true
-        maxProcessCount 8
-    }
-
-    aaptOptions {
-        additionalParameters "--no-version-vectors"
-    }
-
-    kapt {
-        useBuildCache = true
-        javacOptions {
-            // 增加注解处理器的最大错误次数,默认为 100
-            option("-Xmaxerrs", 500)
-        }
-    }
+    compileSdkVersion 21
+    buildToolsVersion "23.0.3"
 
     defaultConfig {
-        vectorDrawables.useSupportLibrary = true
-        multiDexEnabled true
+        applicationId "com.gh.gamecenter"
+        minSdkVersion 14
+        targetSdkVersion 21
+        versionCode 17
+        versionName "2.2"
 
-        ndk {
-            // x86 本来是为了模拟器用户使用 RenderScript 用的，但是其实用到 RenderScript 的人本来就不多 (一天不到 100)，用模拟器的人就更少了
-            // 加了 x86 反而会导致用户没法使用微博登录，因为微博没有提供 x86 的 SO ...
-            // 还会增大 APK 体积，所以还是去掉吧。数据可见 https://sentry.shanqu.cc/organizations/lightgame/issues/144232/?project=22
-            abiFilters "armeabi-v7a", "arm64-v8a"
-        }
-
-        renderscriptTargetApi 18
-        renderscriptSupportModeEnabled true
-
-        // 由于app只针对中文用户，所以仅保留zh资源，其他删掉
-        resConfigs "zh"
-
-        minSdkVersion rootProject.ext.minSdkVersion
-        targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode rootProject.ext.versionCode
-        versionName rootProject.ext.versionName
-        applicationId rootProject.ext.applicationId
-
-        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt', 'proguard-fresco.txt', rootProject.ext.va_proguard_rules
-
-        String CORE_EVENT_GAME_CATEGORY = ""
-
-        // 推广用的关键事件游戏类型
-        buildConfigField "String", "CORE_EVENT_GAME_CATEGORY", "\"${CORE_EVENT_GAME_CATEGORY}\""
-
-        // 推广用的配置 id
-        buildConfigField "String", "CONFIG_ID", "\"${CONFIG_ID}\""
-
-        // 推广用的 SDK 版本 （仅记录使用）
-        buildConfigField "String", "SDK_VERSION", "\"${SDK_VERSION}\""
-        buildConfigField "String", "SDK_APP_ID", "\"${SDK_APP_ID}\""
-        buildConfigField "String", "SDK_APP_NAME", "\"${SDK_APP_NAME}\""
-        buildConfigField "boolean", "USE_DEFAULT_CHANNEL_SDK", "${USE_DEFAULT_CHANNEL_SDK}"
-
-        // 首次启动的跳转配置
-        buildConfigField "String", "FIRST_LAUNCH", "\"${FIRST_LAUNCH}\""
-
-        buildConfigField "int", "ACTIVATE_REPORTING_RATIO", "${ACTIVATE_REPORTING_RATIO}"
-
-        // All third-party appid/appkey
-        buildConfigField "boolean", "IS_GAT_APP", "false"
-        buildConfigField "String", "API_HOST", "\"${API_HOST}\""
-        buildConfigField "String", "NEW_API_HOST", "\"${NEW_API_HOST}\""
-        buildConfigField "String", "LOG_HUB_PROJECT", "\"${LOG_HUB_PROJECT}\""
-        buildConfigField "String", "VAPI_HOST", "\"${VAPI_HOST}\""
-        buildConfigField "String", "WGAME_CPM_BUSIAPPID", "\"${WGAME_CPM_BUSIAPPID}\""
-        buildConfigField "String", "WGAME_CPM_API_HOST", "\"${WGAME_CPM_API_HOST}\""
-        buildConfigField "String", "WECHAT_APPID", "\"${WECHAT_APPID}\""
-        buildConfigField "String", "WECHAT_SECRET", "\"${WECHAT_SECRET}\""
-        buildConfigField "String", "TENCENT_APPID", "\"${TENCENT_APPID}\""
-        buildConfigField "String", "WEIBO_APPKEY", "\"${WEIBO_APPKEY}\""
-        // 一体包的32位畅玩游戏助手包名
-        buildConfigField "String", "EXT_PACKAGE_NAME", "\"${rootProject.ext.EXT_PACKAGE_NAME}\""
+        // 默认的渠道
+//        manifestPlaceholders = [CHANNEL_VALUE: "GH_TEST"]
     }
 
-    // gradle 2.2以上默认同时启用v1和v2（优先用于Android N）
+    /**
+     * 签名设置
+     */
     signingConfigs {
-        debug {
-            v1SigningEnabled true
-            v2SigningEnabled true
-        }
         release {
-            v1SigningEnabled true
-            v2SigningEnabled true
+            storeFile file("gh.keystore")
+            keyAlias "gh.keystore"
+            keyPassword "20150318"
+            storePassword "20150318"
         }
     }
 
-    kapt {
-        arguments {
-            arg("AROUTER_MODULE_NAME", project.name)
-        }
-    }
-
-    packagingOptions {
-        // exclude 部分冗余的文件
-        exclude 'META-INF/gradle/incremental.annotation.processors'
-        exclude 'darwin/x86_64/liblz4-java.dylib'
-
-        exclude 'assets/libwbsafeedit_x86'
-        exclude 'assets/libwbsafeedit_x86_64'
-
-        exclude 'lib/armeabi-v7a/libRSSupport.so'
-        exclude 'lib/arm64-v8a/libRSSupport.so'
-        exclude 'lib/armeabi-v7a/librsjni.so'
-        exclude 'lib/arm64-v8a/librsjni.so'
-
-        resources.excludes += "com/j256/*"
-        resources.excludes += "org/apache/commons/codec/language/bm/*"
-    }
-
     buildTypes {
         debug {
-            debuggable true
             minifyEnabled false
-            zipAlignEnabled false
-            signingConfig signingConfigs.debug
-
-            buildConfigField "String", "EXPOSURE_REPO", "\"test\""
-            buildConfigField "String", "EXPOSURE_VERSION", "\"E4\""
-
-            multiDexKeepProguard file("tinker_multidexkeep.pro")
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         release {
-            debuggable false
-            minifyEnabled true
-            zipAlignEnabled true
-            shrinkResources true
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             signingConfig signingConfigs.release
-
-            buildConfigField "String", "EXPOSURE_REPO", "\"exposure\""
-            buildConfigField "String", "EXPOSURE_VERSION", "\"E4\""
-
-            multiDexKeepProguard file("tinker_multidexkeep.pro")
-        }
-    }
-
-    // Ignore useless variant
-    variantFilter { variant ->
-        def names = variant.flavors*.name
-        def isDebugType = variant.buildType.name == "debug"
-        if ((names.contains("tea") || name.contains("kuaishou") || name.contains("gdt")) && isDebugType) {
-            setIgnore(true)
-        }
-    }
-
-    flavorDimensions("env", "region")
-
-    sourceSets {
-
-        debug {
-            assets.srcDirs += 'src/main/assets-debug'
-        }
-
-        release {
-            assets.srcDirs += 'src/main/assets-release'
-        }
-
-        publish {
-            java.srcDirs = ['src/main/java', "src/default/java"]
-        }
-        internal {
-            java.srcDirs = ['src/main/java', "src/default/java"]
-        }
-        tea {
-            java.srcDirs = ['src/main/java', 'src/tea/java']
-        }
-        kuaishou {
-            java.srcDirs = ['src/main/java', 'src/kuaishou/java']
-        }
-        gdt {
-            java.srcDirs = ['src/main/java', 'src/gdt/java']
-        }
-        gat {
-            java.srcDirs = ['src/main/java', 'src/gat/java']
-        }
-        cn {
-            java.srcDirs = ['src/main/java', 'src/cn/java']
-        }
-        sm {
-            java.srcDirs = ['src/main/java', 'src/sm/java']
         }
     }
 
+    /**
+     * 多渠道打包
+     */
     productFlavors {
-        // internal， 内部测试包使用的 flavor，接口包含包括测试和正式环境
-        internal {
-            dimension "env"
-            versionNameSuffix "-debug"
-
-            buildConfigField "String", "DEV_API_HOST", "\"${DEV_API_HOST}\""
-            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_DEV_API_HOST}\""
-            buildConfigField "String", "DEV_VAPI_HOST", "\"${DEV_VAPI_HOST}\""
-            buildConfigField "String", "QUICK_LOGIN_APPID", "\"${DEV_QUICK_LOGIN_APPID}\""
-            buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${DEV_QUICK_LOGIN_APPKEY}\""
-            buildConfigField "String", "DEV_CSJ_APPID", "\"${DEV_CSJ_APPID}\""
-            buildConfigField "String", "CSJ_APPID", "\"${CSJ_APPID}\""
-
-            buildConfigField "String", "VA_VERSION_NAME", "\"${rootProject.ext.VA_VERSION}-debug\""
-            manifestPlaceholders.put("VA_VERSION_NAME", "${rootProject.ext.VA_VERSION}-debug")
-        }
-
-        // publish， 发布时候使用的 flavor，接口仅包含正式环境
-        publish {
-            dimension "env"
-
-            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
-            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
-            buildConfigField "String", "DEV_VAPI_HOST", "\"${VAPI_HOST}\""
-            buildConfigField "String", "QUICK_LOGIN_APPID", "\"${QUICK_LOGIN_APPID}\""
-            buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${QUICK_LOGIN_APPKEY}\""
-            buildConfigField "String", "DEV_CSJ_APPID", "\"${CSJ_APPID}\""
-            buildConfigField "String", "CSJ_APPID", "\"${CSJ_APPID}\""
-
-            buildConfigField "String", "VA_VERSION_NAME", "\"${rootProject.ext.VA_VERSION}\""
-            manifestPlaceholders.put("VA_VERSION_NAME", "${rootProject.ext.VA_VERSION}")
-        }
-
-        tea {
-            dimension "env"
-
-            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
-            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
-            buildConfigField "String", "DEV_VAPI_HOST", "\"${VAPI_HOST}\""
-            buildConfigField "String", "QUICK_LOGIN_APPID", "\"${QUICK_LOGIN_APPID}\""
-            buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${QUICK_LOGIN_APPKEY}\""
-            buildConfigField "String", "DEV_CSJ_APPID", "\"${CSJ_APPID}\""
-            buildConfigField "String", "CSJ_APPID", "\"${CSJ_APPID}\""
-
-            buildConfigField "String", "VA_VERSION_NAME", "\"${rootProject.ext.VA_VERSION}\""
-
-            manifestPlaceholders.put("APPLOG_SCHEME", "rangersapplog.byAx6uYt".toLowerCase())
-            manifestPlaceholders.put("VA_VERSION_NAME", "${rootProject.ext.VA_VERSION}")
-        }
-
-        kuaishou {
-            dimension "env"
-
-            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
-            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
-            buildConfigField "String", "DEV_VAPI_HOST", "\"${VAPI_HOST}\""
-            buildConfigField "String", "QUICK_LOGIN_APPID", "\"${QUICK_LOGIN_APPID}\""
-            buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${QUICK_LOGIN_APPKEY}\""
-            buildConfigField "String", "DEV_CSJ_APPID", "\"${CSJ_APPID}\""
-            buildConfigField "String", "CSJ_APPID", "\"${CSJ_APPID}\""
-
-            buildConfigField "String", "VA_VERSION_NAME", "\"${rootProject.ext.VA_VERSION}\""
-            manifestPlaceholders.put("VA_VERSION_NAME", "${rootProject.ext.VA_VERSION}")
-        }
-
-        gdt {
-            dimension "env"
-
-            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
-            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
-            buildConfigField "String", "DEV_VAPI_HOST", "\"${VAPI_HOST}\""
-            buildConfigField "String", "QUICK_LOGIN_APPID", "\"${QUICK_LOGIN_APPID}\""
-            buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${QUICK_LOGIN_APPKEY}\""
-            buildConfigField "String", "DEV_CSJ_APPID", "\"${CSJ_APPID}\""
-            buildConfigField "String", "CSJ_APPID", "\"${CSJ_APPID}\""
-
-            buildConfigField "String", "VA_VERSION_NAME", "\"${rootProject.ext.VA_VERSION}\""
-            manifestPlaceholders.put("VA_VERSION_NAME", "${rootProject.ext.VA_VERSION}")
-        }
-
-        sm {
-            dimension "env"
-
-            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
-            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
-            buildConfigField "String", "DEV_VAPI_HOST", "\"${VAPI_HOST}\""
-            buildConfigField "String", "QUICK_LOGIN_APPID", "\"${QUICK_LOGIN_APPID}\""
-            buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${QUICK_LOGIN_APPKEY}\""
-            buildConfigField "String", "DEV_CSJ_APPID", "\"${CSJ_APPID}\""
-            buildConfigField "String", "CSJ_APPID", "\"${CSJ_APPID}\""
-
-            buildConfigField "String", "VA_VERSION_NAME", "\"${rootProject.ext.VA_VERSION}\""
-            manifestPlaceholders.put("VA_VERSION_NAME", "${rootProject.ext.VA_VERSION}")
-        }
-
-        // 港澳台
-        gat {
-            dimension "region"
-
-            applicationId rootProject.ext.applicationIdGat
-
-            // 支持繁体
-            resConfigs "zh", "zh-rTW"
-
-            buildConfigField "boolean", "IS_GAT_APP", "true"
-            buildConfigField "String", "LOG_HUB_PROJECT", "\"${LOG_HUB_PROJECT_GAT}\""
-            buildConfigField "String", "API_HOST", "\"${API_HOST_GAT}\""
-            buildConfigField "String", "NEW_API_HOST", "\"${NEW_API_HOST_GAT}\""
-        }
-
-        cn {
-            dimension "region"
-        }
+        GH_100 {}
+        GH_101 {}
+        GH_102 {}
+        GH_103 {}
+        GH_104 {}
+        GH_106 {}
+        GH_107 {}
+        GH_108 {}
+        GH_109 {}
+        GH_110 {}
+        GH_111 {}
+        GH_113 {}
+        GH_114 {}
+        GH_115 {}
+        GH_116 {}
+        GH_117 {}
+        GH_118 {}
+        GH_119 {}
+        GH_120 {}
+        GH_121 {}
+        GH_123 {}
+        GH_127 {}
+        GH_200 {}
+        GH_201 {}
+        GH_202 {}
+        GH_203 {}
+        GH_204 {}
+        GH_205 {}
+        GH_222 {}
+        GH_307 {}
+        GH_TEST {}
+    }
+    productFlavors.all { flavor ->
+        flavor.manifestPlaceholders = [CHANNEL_VALUE: name]//命令 gradlew assembleRelease
     }
 }
 
-repositories {
-    flatDir {
-        dirs 'libs', 'libs/aars'
-    }
-}
-
-// 删除不需要的 assets
-android.applicationVariants.configureEach { variant ->
-    variant.mergeAssets.doLast {
-        def assetDir = variant.mergeAssetsProvider.get().outputDir.get()
-        def unwantedAssets = ['2011394667', 'gdt_plugin/gdtadv2.jar']
-
-        unwantedAssets.each { assetPath ->
-            def file = new File([assetDir, assetPath].join(File.separator))
-            if (file.exists()) {
-                file.delete()
-            }
-        }
+//butterknife
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
     }
 }
+apply plugin: 'com.neenbedankt.android-apt'
 
 dependencies {
-
-    implementation fileTree(include: ['*.jar', '*.aar'], dir: 'libs')
-
-    teaImplementation fileTree(include: ['*.jar', '*.aar'], dir: 'src/tea/libs')
-    kuaishouImplementation fileTree(include: ['*.jar', '*.aar'], dir: 'src/kuaishou/libs')
-    gdtImplementation fileTree(include: ['*.jar', '*.aar'], dir: 'src/gdt/libs')
-    smImplementation fileTree(include: ['*.jar', '*.aar'], dir: 'src/sm/libs')
-
-    debugImplementation "com.squareup.leakcanary:leakcanary-android:${leakcanary}"
-    debugImplementation "com.squareup.leakcanary:leakcanary-android-process:${leakcanary}"
-
-//    debugImplementation "com.gu.android:toolargetool:${toolargetool}" // 需要使用调试时才启用
-    debugImplementation "com.github.nichbar:WhatTheStack:${whatTheStack}"
-
-    implementation "androidx.multidex:multidex:${multiDex}"
-    implementation "androidx.fragment:fragment-ktx:${fragment}"
-
-    implementation "androidx.annotation:annotation:${annotation}"
-
-    implementation "androidx.viewpager2:viewpager2:${viewpager2}"
-    kapt "androidx.room:room-compiler:${room}"
-
-    implementation "com.tencent.vasdolly:helper:${apkChannelPackage}"
-    implementation "com.tencent.vasdolly:writer:${apkChannelPackage}"
-
-    implementation "com.j256.ormlite:ormlite-android:${ormlite}"
-    implementation "com.j256.ormlite:ormlite-core:${ormlite}"
-
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:${kotlin_version}"
-
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-
-    implementation "com.contrarywind:Android-PickerView:${pickerView}"
-
-    implementation "net.cachapa.expandablelayout:expandablelayout:${expandableLayout}"
-
-    // 用于比较 versionName 是大于小于或等于
-    implementation "com.g00fy2:versioncompare:${versioncompare}"
-
-    // for video streaming
-    implementation("com.github.CarGuo.GSYVideoPlayer:gsyVideoPlayer-java:$gsyVideo", {
-        exclude module: "gsyvideoplayer-androidvideocache"
-        exclude group: "tv.danmaku.ijk.media"
-    })
-    implementation ("com.github.CarGuo.GSYVideoPlayer:gsyVideoPlayer-exo_player2:$gsyVideo") {
-        exclude group: 'com.google.android.exoplayer', module: 'extension-rtmp'
-    }
-
-    implementation "com.llew.huawei:verifier:${verifier}"
-
-    teaImplementation "com.bytedance.applog:RangersAppLog-Lite-cn:${bytedanceApplog}"
-    teaImplementation "com.bytedance.ads:AppConvert:${bytedanceAppConvert}"
-
-    implementation "net.lingala.zip4j:zip4j:${zip4j}"
-
-    implementation "com.github.hsiafan:apk-parser:${apkParser}"
-    implementation "org.nanohttpd:nanohttpd:${nanohttpd}"
-
-    implementation "com.lg:easyfloat:${easyFloat}"
-
-    implementation("com.lg:apksig:${apksig}") {
-        exclude group: 'com.google.protobuf'
-    }
-
-    implementation "com.lg:gid:${gid}"
-
-    implementation "com.lg:shortcut:${shortcut}"
-
-    coreLibraryDesugaring "com.android.tools:desugar_jdk_libs:${desugarJdkLibs}"
-
-    kapt "com.alibaba:arouter-compiler:$arouterVersion"
-
-    implementation project(':ndownload')
-    implementation project(':vspace-bridge:vspace')
-    implementation(project(':feature:xapk-installer'))
-
-    implementation(project(':module_common')) {
-        exclude group: 'androidx.swiperefreshlayout'
-    }
-
-    implementation(project(':module_login')) {
-        exclude group: 'androidx.swiperefreshlayout'
-    }
-
-    implementation(project(':module_core_feature')) {
-        exclude group: 'androidx.swiperefreshlayout'
-    }
-
-    implementation(project(':module_setting')) {
-        exclude group: 'androidx.swiperefreshlayout'
-    }
-
-    //    implementation(project(':module_setting_compose')) {
-    //        exclude group: 'androidx.swiperefreshlayout'
-    //    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enablePkg) {
-        implementation(project(':feature:pkg'))
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableFeedback) {
-        implementation(project(':feature:new_feedback')) {
-            exclude group: 'androidx.swiperefreshlayout'
-        }
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableMessage) {
-        implementation(project(':module_message')) {
-            exclude group: 'androidx.swiperefreshlayout'
-        }
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableOaid) {
-        implementation(project(':feature:oaid'))
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableFloatingWindow) {
-        implementation(project(':feature:floating-window'))
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableSensorData) {
-        implementation(project(':module_sensors_data')) {
-            exclude group: 'androidx.swiperefreshlayout'
-        }
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableCsjAd) {
-        implementation(project(':feature:csj_ad'))
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableQQGame) {
-        implementation(project(':feature:qq_game')) {
-            exclude group: 'androidx.swiperefreshlayout'
-        }
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enablePush) {
-        def pushProperty = findProperty('BUILD_PUSH_TYPE')
-        // 根据BUILD_PUSH_TYPE决定使用哪个推送SDK，目前默认使用极光推送
-        def pushProject = (pushProperty == null || pushProperty == 'jg')
-                ? project(':feature:jg_push') : project(':feature:acloud_push')
-
-        implementation(pushProject) {
-            exclude group: 'androidx.swiperefreshlayout'
-        }
-    }
-
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableSentry) {
-        implementation(project(':feature:sentry'))
-    }
-
-    implementation(project(':feature:media_select'))
-
-    implementation(project(":module_va_api"))
-    implementation(project(":va-archive-common"))
-    if (!gradle.ext.excludeOptionalModules || gradle.ext.enableVa) {
-        implementation(project(":module_va_impl"))
-    }
-    debugImplementation "com.bytedance.tools.codelocator:codelocator-core:2.0.3"
-    internalImplementation(project(':module_internal_test'))
-
-    debugImplementation 'com.bytedance.android:shadowhook:1.0.9'
-    debugImplementation 'io.github.shiqos:wytrace:1.0.1'
-}
-
-File propFile = file('sign.properties')
-if (propFile.exists()) {
-    Properties props = new Properties()
-    props.load(new FileInputStream(propFile))
-
-    if (props.containsKey('keyAlias') && props.containsKey('keyPassword') &&
-            props.containsKey('storeFile') && props.containsKey('storePassword')) {
-        android.signingConfigs {
-            // debug 不要使用正式签名，这样tinker才不会打补丁。
-            debug {
-                keyAlias props.get('keyAlias')
-                keyPassword props.get('keyPassword')
-                storeFile file(props.get('storeFile'))
-                storePassword props.get('storePassword')
-            }
-            release {
-                keyAlias props.get('keyAlias')
-                keyPassword props.get('keyPassword')
-                storeFile file(props.get('storeFile'))
-                storePassword props.get('storePassword')
-            }
-        }
-    } else {
-        android.buildTypes.release.signingConfig = null
-    }
-} else {
-    android.buildTypes.release.signingConfig = null
-}
-
-// 用于测试读取 META-INF 里的文件
-//task generateMetaJson {
-//    def resDir = new File(buildDir, 'generated/FILES_FOR_META_INF/')
-//    def destDir = new File(resDir, 'META-INF/')
-//    // Add resDir as a resource directory so that it is automatically included in the APK.
-//    android {
-//        sourceSets {
-//            main.resources {
-//                srcDir resDir
-//            }
-//        }
-//    }
-//
-//    doLast {
-//        if (!destDir.exists()) destDir.mkdirs()
-//        copy {
-//            into destDir
-//            from new File('generated/FILES_FOR_META_INF/META-INF/halo_skip.json')
-//        }
-//    }
-//}
-//// Specify when put_files_in_META_INF should run
-//project.afterEvaluate {
-//    tasks.findAll { task ->
-//        task.name.startsWith('merge') && task.name.endsWith('Resources')
-//    }.each { t -> t.dependsOn generateMetaJson }
-//}
-
-project.afterEvaluate {
-    def variants = null
-    try {
-        variants = android.applicationVariants
-    } catch (Throwable t) {
-        t.printStackTrace()
-        try {
-            variants = android.libraryVariants
-        } catch (Throwable tt) {
-            tt.printStackTrace()
-        }
-    }
-    if (variants != null) {
-        variants.all { variant ->
-            variant.outputs.each { output ->
-                def task = output.processManifestProvider.get()
-                if (task == null) {
-                    return
-                }
-
-                /**
-                 * 为 Manifest 的 Activity 的 configChanges 添加自己手动处理 configurationChanges 配置 [https://developer.android.com/guide/topics/resources/runtime-changes]
-                 * AGP 4.1.0 从 ProcessManifest task 里拿 manifest 的 API 变更调整可以参考这里 [https://github.com/Tencent/tinker/pull/1476/commits/d71645729b13d545ca4ba6826f93fbf558751434]
-                 * (搞半天还是不会抽离方法，有空再把 gradle 改成用 kotlin 实现吧)
-                 */
-                task.doLast {
-                    def manifestFile = new File(multiApkManifestOutputDirectory.get().asFile, "AndroidManifest.xml")
-                    if (manifestFile == null || !manifestFile.exists()) {
-                        return
-                    }
-
-                    String[] configChanges = [
-                            "density",
-                            "fontScale",
-                            "keyboard",
-                            "keyboardHidden",
-                            "layoutDirection",
-                            "locale",
-                            "mcc",
-                            "mnc",
-                            "navigation",
-                            "orientation",
-                            "screenLayout",
-                            "screenSize",
-                            "smallestScreenSize",
-                            "touchscreen",
-                            "uiMode"]
-
-                    def parser = new XmlSlurper(false, true)
-                    def manifest = parser.parse(manifestFile)
-                    def app = manifest.'application'[0]
-                    app.'activity'.each { act ->
-                        String value = act.attributes()['android:configChanges']
-                        if (value == null || value.isEmpty()) {
-                            if (value == null) value = ""
-                            configChanges.eachWithIndex { config, index ->
-                                if (index != configChanges.length - 1) {
-                                    value += config + "|"
-                                } else {
-                                    value += config
-                                }
-                            }
-                            act.attributes()['androidconfigChanges'] = value
-                        } else {
-                            String[] valueSplit = value.split("\\|")
-                            println configChanges
-                            configChanges.eachWithIndex { config, index ->
-                                if (!valueSplit.contains(config)) {
-                                    value += ("|" + config)
-                                }
-                            }
-                            act.attributes()['android:configChanges'] = value
-                        }
-                    }
-
-                    def tmpManifest = XmlUtil.serialize(manifest).replaceAll("androidconfigChanges", "android:configChanges")
-                    manifest = parser.parseText(tmpManifest)
-                    manifestFile.setText(XmlUtil.serialize(manifest), "utf-8")
-                }
-            }
-        }
-    }
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:21.0.0'
+    compile 'com.android.support:cardview-v7:21.0.0'
+    // fresco图片框架
+    compile 'com.facebook.fresco:fresco:0.12.0'
+    compile 'com.facebook.fresco:animated-gif:0.12.0'
+    // Retrofit2所需要的包
+    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'
+    // okhttp
+    compile 'com.squareup.okhttp3:okhttp:3.2.0'
+    // ConverterFactory的Gson依赖包
+    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
+    // ConverterFactory的String依赖包
+    compile 'com.squareup.retrofit2:converter-scalars:2.0.0-beta4'
+    // ConverterFactory的RxJava依赖包
+    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'
+    // gson
+    compile 'com.google.code.gson:gson:2.8.0'
+    // OrmLite数据库
+    compile 'com.j256.ormlite:ormlite-android:5.0'
+    compile 'com.j256.ormlite:ormlite-core:5.0'
+    // butterknife
+    compile 'com.jakewharton:butterknife:8.4.0'
+    apt 'com.jakewharton:butterknife-compiler:8.4.0'
+    // RxJava && RxAndroid
+    compile 'io.reactivex:rxandroid:1.1.0'
+    compile 'io.reactivex:rxjava:1.1.0'
+    // RxBinding
+    compile 'com.jakewharton.rxbinding:rxbinding:0.3.0'
+    //    compile 'com.jakewharton.rxbinding:rxbinding-appcompat-v7:0.3.0'
+    //    compile 'com.jakewharton.rxbinding:rxbinding-design:0.3.0'
 }

app/proguard-fresco.txt

@@ -1,21 +0,0 @@
-# Keep our interfaces so they can be used by other ProGuard rules.
-# See http://sourceforge.net/p/proguard/bugs/466/
--keep,allowobfuscation @interface com.facebook.common.internal.DoNotStrip
-
-# Do not strip any method/class that is annotated with @DoNotStrip
--keep @com.facebook.common.internal.DoNotStrip class *
--keepclassmembers class * {
-    @com.facebook.common.internal.DoNotStrip *;
-}
-
-# Keep native methods
--keepclassmembers class * {
-    native <methods>;
-}
-
--dontwarn okio.**
--dontwarn com.squareup.okhttp.**
--dontwarn okhttp3.**
--dontwarn javax.annotation.**
--dontwarn com.android.volley.toolbox.**
--dontwarn com.facebook.infer.**

app/proguard-rules.pro

@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in C:\Android\sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

app/proguard-rules.txt

@@ -1,98 +0,0 @@
-
-# inline getter method
--allowaccessmodification
-
-# TODO Dicard sourceFile in final release build but remain in internal build.
--renamesourcefileattribute SourceFile
-# Keep Attribute
--keepattributes *Annotation*,Signature,InnerClasses,EnclosingMethod,SourceFile,LineNumberTable
-
-# OrmLite
--keep class com.j256.*
--keepclassmembers class com.j256.* { *; }
--keep enum com.j256.*
--keepclassmembers enum com.j256.* { *; }
--keep interface com.j256.*
--keepclassmembers interface com.j256.* { *; }
--dontwarn com.j256.**
-
-### app models
--keep class com.gh.gamecenter.db.info.* {*;}
--keep class com.gh.gamecenter.entity.** {<fields>;}
--keep class com.gh.gamecenter.qa.entity.** {<fields>;}
--keep class com.gh.download.DownloadDataSimpleEntity {<fields>;}
--keep class com.gh.gamecenter.floatingwindow.FloatingWindowEntity {<fields>;}
--keep class com.gh.gamecenter.BR
--keep class com.gh.gamecenter.retrofit.* {*;}
--keep class com.gh.gamecenter.eventbus.* {*;}
--keep class com.gh.gamecenter.home.gamecollection.carousel.GameCollectionStackLayout {*;}
--keep class com.gh.gamecenter.home.gamecollection.carousel.GameCollectionStackAnimation {*;}
-
-# Prevent R8 from leaving Data object members always null
--keepclassmembers,allowobfuscation class * {
-  @com.google.gson.annotations.SerializedName <fields>;
-}
-
-# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
-# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
--keep class * extends com.google.gson.TypeAdapter
--keep class * implements com.google.gson.TypeAdapterFactory
--keep class * implements com.google.gson.JsonSerializer
--keep class * implements com.google.gson.JsonDeserializer
-
-# Retain generic signatures of TypeToken and its subclasses with R8 version 3.0 and higher.
--keep,allowobfuscation,allowshrinking class com.google.gson.reflect.TypeToken
--keep,allowobfuscation,allowshrinking class * extends com.google.gson.reflect.TypeToken
-
-# TODO What's this ?
--ignorewarnings
-
-### 视频相关
--keep class com.shuyu.gsyvideoplayer.video.* { *; }
--dontwarn com.shuyu.gsyvideoplayer.video.**
--keep class com.shuyu.gsyvideoplayer.video.base.* { *; }
--dontwarn com.shuyu.gsyvideoplayer.video.base.**
--keep class com.shuyu.gsyvideoplayer.utils.* { *; }
--dontwarn com.shuyu.gsyvideoplayer.utils.**
--keep class tv.danmaku.ijk.* { *; }
--dontwarn tv.danmaku.ijk.**
--keep public class * extends android.view.View {
-    *** get*();
-    void set*(***);
-    public <init>(android.content.Context);
-    public <init>(android.content.Context, android.util.AttributeSet);
-    public <init>(android.content.Context, android.util.AttributeSet, int);
-}
-
-### RecyclerView.jumpToPositionForSmoothScroller
--keep class androidx.recyclerview.widget.RecyclerView {
-  void jumpToPositionForSmoothScroller(int);
-}
-
-### ViewBinding 反射相关
--keep class * implements androidx.viewbinding.ViewBinding {
-    public static *** inflate(android.view.LayoutInflater, android.view.ViewGroup, boolean);
-}
-
-### TEA
--keep class com.gh.gamecenter.TeaHelper { *; }
-
-### EasyFloat
--keep class com.lzf.easyfloat.* {*;}
-
-### 广点通SDK
--dontwarn com.qq.gdt.action.**
--keep class com.qq.gdt.action.** {*;}
--keep public class com.tencent.turingfd.sdk.**
-
-### 神马 SDK
--dontwarn com.gism.**
-
--keepclasseswithmembers class * {
-native <methods>;
-}
-
--keepclassmembernames class com.contrarywind.view.WheelView {
-    private int itemsVisible;
-}
-

app/sign.properties

@@ -1,4 +0,0 @@
-storeFile=gh.keystore
-storePassword=20150318
-keyAlias=gh.keystore
-keyPassword=20150318

app/src/androidTest/java/com/gh/gamecenter/ApplicationTest.java

@@ -0,0 +1,13 @@
+package com.gh.gamecenter;
+
+import android.app.Application;
+import android.test.ApplicationTestCase;
+
+/**
+ * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
+ */
+public class ApplicationTest extends ApplicationTestCase<Application> {
+    public ApplicationTest() {
+        super(Application.class);
+    }
+}

app/src/default/java/com/gh/gamecenter/provider/FlavorProviderImp.kt

@@ -1,40 +0,0 @@
-package com.gh.gamecenter.provider
-
-import android.app.Activity
-import android.app.Application
-import android.text.TextUtils
-import com.gh.gamecenter.common.constant.Config
-import com.gh.gamecenter.common.constant.Constants
-import com.gh.gamecenter.common.utils.PackageFlavorHelper
-import com.gh.gamecenter.core.provider.IFlavorProvider
-import com.gh.gamecenter.core.utils.SPUtils
-import com.tencent.vasdolly.helper.ChannelReaderUtil
-
-class FlavorProviderImp : IFlavorProvider {
-    override fun getChannelStr(application: Application): String {
-        var channel = ChannelReaderUtil.getChannel(application)
-        if (channel == null || TextUtils.isEmpty(channel.trim())) {
-            channel = if (PackageFlavorHelper.IS_TEST_FLAVOR) {
-                Config.DEFAULT_CHANNEL
-            } else {
-                Config.DEFAULT_CHANNEL_FOR_RELEASE
-            }
-        }
-        if (PackageFlavorHelper.IS_TEST_FLAVOR) {
-            channel = SPUtils.getString(Constants.SP_TEST_FLAVOR_CHANNEL, channel)
-        }
-        return channel
-    }
-
-    override fun init(application: Application, activity: Activity, activateRatio: Int) {
-        // do nothing
-    }
-
-    override fun logEvent(content: String) {
-        // do nothing
-    }
-
-    override fun logCoreEvent() {
-        // do nothing
-    }
-}

app/src/gdt/java/com/gh/gamecenter/GdtHelper.kt

@@ -1,47 +0,0 @@
-package com.gh.gamecenter
-
-import android.app.Application
-import com.lightgame.utils.Utils
-import com.qq.gdt.action.ActionParam
-import com.qq.gdt.action.ActionType
-import com.qq.gdt.action.GDTAction
-import com.qq.gdt.action.PrivateController
-import org.json.JSONObject
-
-object GdtHelper {
-    private const val USER_ACTION_SET_ID = "1201041887"
-    private const val APP_SECRET_ID = "c29cc5c48cf540c43b4b97363bb09216"
-
-    private const val KS_USER_ACTION_SET_ID = "1201032128"
-    private const val KS_APP_SECRET_ID = "9bdbbb81d4e0bd333a2a581f9ee36986"
-
-    @JvmStatic
-    fun init(application: Application, channel: String) {
-        GDTAction.setPrivateController(object : PrivateController() {
-            override fun isCanUsePhoneState(): Boolean {
-                return false
-            }
-        })
-
-        if (channel == "KS_GDT_GHZS_MC01") {
-            GDTAction.init(application, KS_USER_ACTION_SET_ID, KS_APP_SECRET_ID, channel)
-        } else {
-            GDTAction.init(application, USER_ACTION_SET_ID, APP_SECRET_ID, channel)
-        }
-
-        GDTAction.start()
-
-        Utils.log("init GdtHelper")
-    }
-
-    @JvmStatic
-    fun logAction(type: String) {
-        when (type) {
-            "EVENT_ACTIVE" -> GDTAction.logAction(ActionType.START_APP)
-            "active_register" -> GDTAction.logAction(ActionType.REGISTER)
-            "EVENT_NEXTDAY_STAY" -> GDTAction.logAction(ActionType.START_APP, JSONObject().apply {
-                put(ActionParam.Key.LENGTH_OF_STAY, 1)
-            })
-        }
-    }
-}

app/src/gdt/java/com/gh/gamecenter/provider/FlavorProviderImp.kt

@@ -1,52 +0,0 @@
-package com.gh.gamecenter.provider
-
-import android.app.Activity
-import android.app.Application
-import android.text.TextUtils
-import com.gh.gamecenter.GdtHelper
-import com.gh.gamecenter.core.provider.IFlavorProvider
-import com.gh.gamecenter.core.utils.SPUtils
-import com.gh.gamecenter.core.utils.TimeUtils
-import com.halo.assistant.HaloApp
-import com.tencent.vasdolly.helper.ChannelReaderUtil
-
-class FlavorProviderImp : IFlavorProvider {
-
-    override fun init(application: Application, activity: Activity, activateRatio: Int) {
-        GdtHelper.init(application, getChannelStr(application))
-
-        if (HaloApp.getInstance().isBrandNewInstall) {
-            logEvent("EVENT_ACTIVE")
-            SPUtils.setLong("TIME_OF_BRAND_NEW_INSTALL", System.currentTimeMillis() / 1000)
-        } else {
-            val shouldSendRetentionLogEvent =
-                SPUtils.getBoolean("SHOULD_SEND_RETENTION_EVENT", true)
-            val installTimeNotToday =
-                !TimeUtils.isToday(SPUtils.getLong("TIME_OF_BRAND_NEW_INSTALL", System.currentTimeMillis() / 1000))
-            if (shouldSendRetentionLogEvent && installTimeNotToday) {
-                logEvent("EVENT_NEXTDAY_STAY")
-                SPUtils.setBoolean("SHOULD_SEND_RETENTION_EVENT", false)
-            }
-        }
-    }
-
-    override fun getChannelStr(application: Application): String {
-        var channel = ChannelReaderUtil.getChannel(application)
-        if (channel == null || TextUtils.isEmpty(channel.trim())) {
-            channel = GDT_DEFAULT_CHANNEL
-        }
-        return channel
-    }
-
-    override fun logEvent(content: String) {
-        GdtHelper.logAction(content)
-    }
-
-    override fun logCoreEvent() {
-        // do nothing
-    }
-
-    companion object {
-        private const val GDT_DEFAULT_CHANNEL = "GDT_GHZS_01"
-    }
-}

app/src/internal/java/com/gh/vspace/ExternalGameUsage.kt

@@ -1,42 +0,0 @@
-package com.gh.vspace
-
-import android.content.Intent
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import androidx.annotation.Keep
-import com.gh.gamecenter.R
-import com.gh.gamecenter.core.utils.ToastUtils
-import com.gh.gamecenter.databinding.LayoutPersonalOtherItemBinding
-import com.gh.vspace.installexternalgames.InstallExternalGameActivity
-import com.lightgame.utils.Utils
-import java.io.File
-
-@Keep
-class ExternalGameUsage : ITestCase {
-
-    private fun buttonTemplate(viewParent: ViewGroup, id: Int, fn: (LayoutPersonalOtherItemBinding) -> Unit) {
-        val context = viewParent.context
-        viewParent.findViewById<View>(id) ?: run {
-            val binding = LayoutPersonalOtherItemBinding.inflate(LayoutInflater.from(context)).apply {
-                root.id = id
-                fn(this)
-            }
-            viewParent.addView(binding.root, 0)
-        }
-    }
-
-    override fun addInstallExternalGameButton(viewParent: ViewGroup) {
-        val context = viewParent.context
-        buttonTemplate(viewParent, R.id.install_game_from_external) {
-            it.titleTv.text = context.getString(R.string.title_install_external_game)
-            it.iconIv.setImageResource(R.drawable.ic_personal_my_game)
-            it.root.setOnClickListener {
-                context.startActivity(
-                    InstallExternalGameActivity.getIntent(context)
-                        .apply { flags = flags or Intent.FLAG_ACTIVITY_NEW_TASK })
-            }
-        }
-    }
-
-}

app/src/internal/java/com/gh/vspace/installexternalgames/Constants.java

@@ -1,5 +0,0 @@
-package com.gh.vspace.installexternalgames;
-
-public class Constants {
-    public static final String TAG = "从SD卡安装";
-}

app/src/internal/java/com/gh/vspace/installexternalgames/ExternalGameAdapter.kt

@@ -1,52 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
-import com.gh.gamecenter.common.utils.goneIf
-import com.gh.gamecenter.common.utils.toBinding
-
-class ExternalGameAdapter(private val games: List<ExternalGameUiState>, private val onItemClickListener: OnItemClickListener) :
-    RecyclerView.Adapter<ExternalGameViewHolder>() {
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ExternalGameViewHolder {
-        return ExternalGameViewHolder(parent.toBinding())
-    }
-
-    override fun getItemCount(): Int {
-        return games.size
-    }
-
-    override fun onBindViewHolder(holder: ExternalGameViewHolder, position: Int) {
-        val item = games[position]
-        holder.apkInfo.text = item.externalGameEntity.let { item ->
-            """
-            应用程序名：${item.appName}
-            版本号：${item.apkVersion}
-            包名: ${item.apkPackageName}
-            路径:${item.apkPath}
-            """.trimIndent()
-        }
-
-        holder.update.setOnClickListener {
-            onItemClickListener.onItemClick(item, OnItemClickListener.ClickType.CLICK_INSTALL)
-        }
-
-        holder.install.goneIf(item.isInstalled) {
-            holder.install.setOnClickListener {
-                onItemClickListener.onItemClick(item, OnItemClickListener.ClickType.CLICK_INSTALL)
-            }
-        }
-        holder.uninstall.goneIf(!item.isInstalled) {
-            holder.uninstall.setOnClickListener {
-                onItemClickListener.onItemClick(
-                    item,
-                    OnItemClickListener.ClickType.CLICK_UNINSTALL
-                )
-            }
-        }
-        holder.start.goneIf(!item.isInstalled) {
-            holder.start.setOnClickListener {
-                onItemClickListener.onItemClick(item, OnItemClickListener.ClickType.CLICK_START)
-            }
-        }
-    }
-}

app/src/internal/java/com/gh/vspace/installexternalgames/ExternalGameEntity.kt

@@ -1,11 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-data class ExternalGameEntity(
-    val cpuAbi: Set<String>,
-    val apkPath: String,
-    val apkFileName: String,
-    val appName: String,
-    val apkVersion: String,
-    val apkPackageName: String,
-    val lastModified: Long,
-)

app/src/internal/java/com/gh/vspace/installexternalgames/ExternalGameUiState.kt

@@ -1,6 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-data class ExternalGameUiState(
-    val externalGameEntity: ExternalGameEntity,
-    val isInstalled: Boolean
-)

app/src/internal/java/com/gh/vspace/installexternalgames/ExternalGameViewHolder.kt

@@ -1,12 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-import androidx.recyclerview.widget.RecyclerView
-import com.gh.gamecenter.databinding.LayoutExternalGameItemBinding
-
-class ExternalGameViewHolder(binding: LayoutExternalGameItemBinding) : RecyclerView.ViewHolder(binding.root) {
-    val apkInfo = binding.apkFileInfo
-    val install = binding.btnInstall
-    val uninstall = binding.btnUninstall
-    val start = binding.btnStart
-    val update = binding.btnUpdate
-}

app/src/internal/java/com/gh/vspace/installexternalgames/InstallExternalGameActivity.kt

@@ -1,14 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-import android.content.Context
-import android.content.Intent
-import android.os.Bundle
-import com.gh.gamecenter.common.base.activity.ToolBarActivity
-
-class InstallExternalGameActivity : ToolBarActivity() {
-    companion object {
-        fun getIntent(context: Context): Intent {
-            return getTargetIntent(context, InstallExternalGameActivity::class.java, InstallExternalGameFragment::class.java, Bundle())
-        }
-    }
-}

app/src/internal/java/com/gh/vspace/installexternalgames/InstallExternalGameFragment.kt

@@ -1,200 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-import android.Manifest
-import android.app.Dialog
-import android.content.ComponentName
-import android.content.pm.PackageManager
-import android.os.Bundle
-import androidx.activity.result.contract.ActivityResultContracts
-import androidx.core.content.ContextCompat
-import androidx.recyclerview.widget.LinearLayoutManager
-import com.gh.common.util.DialogUtils
-import com.gh.gamecenter.common.base.fragment.ToolbarFragment
-import com.gh.gamecenter.common.exposure.meta.MetaUtil
-import com.gh.gamecenter.common.utils.dip2px
-import com.gh.gamecenter.common.utils.toColor
-import com.gh.gamecenter.common.utils.viewModelProvider
-import com.gh.gamecenter.common.view.divider.HorizontalDividerItemDecoration
-import com.gh.gamecenter.core.AppExecutor
-import com.gh.gamecenter.databinding.FragmentInstallExternalGamesBinding
-import com.gh.vspace.VHelper
-import com.halo.assistant.HaloApp
-import com.lg.vspace.VirtualAppManager
-import com.lightgame.download.DownloadEntity
-import io.reactivex.Single
-import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.disposables.Disposable
-import io.reactivex.schedulers.Schedulers
-
-class InstallExternalGameFragment : ToolbarFragment(), OnItemClickListener {
-
-    private val mViewModel: InstallExternalGameViewModel by lazy { viewModelProvider() }
-
-    private lateinit var mBinding: FragmentInstallExternalGamesBinding
-
-    private val games = mutableListOf<ExternalGameUiState>()
-    private var adapter = ExternalGameAdapter(games, this)
-
-    private var uninstallDisposable: Disposable? = null
-
-    override fun getLayoutId() = 0
-
-    override fun getInflatedLayout() =
-        FragmentInstallExternalGamesBinding.inflate(layoutInflater).apply { mBinding = this }.root
-
-    private lateinit var dialog: Dialog
-
-
-    private val requestPermissionLauncher = registerForActivityResult<String, Boolean>(
-        ActivityResultContracts.RequestPermission()
-    ) { result ->
-        if (result == true) {
-            // grant
-            mViewModel.scanPaths()
-        } else {
-            // not grant
-        }
-    }
-
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setNavigationTitle(getString(com.gh.gamecenter.R.string.title_install_external_game))
-        initView()
-        mViewModel.gamesList.observe(this) {
-            if (dialog.isShowing) {
-                dialog.dismiss()
-            }
-            games.clear()
-            games.addAll(
-                it.map {
-                    ExternalGameUiState(it, VHelper.isInstalled(it.apkPackageName))
-                }
-            )
-            adapter.notifyDataSetChanged()
-        }
-
-        requestStoragePermission()
-    }
-
-    private fun requestStoragePermission() {
-        when {
-            ContextCompat.checkSelfPermission(
-                requireContext(),
-                Manifest.permission.READ_EXTERNAL_STORAGE
-            ) == PackageManager.PERMISSION_GRANTED -> {
-                mViewModel.scanPaths()
-            }
-
-            shouldShowRequestPermissionRationale(Manifest.permission.READ_EXTERNAL_STORAGE) -> {
-                requestPermissionLauncher.launch(Manifest.permission.READ_EXTERNAL_STORAGE)
-            }
-
-            else -> {
-                requestPermissionLauncher.launch(Manifest.permission.READ_EXTERNAL_STORAGE)
-            }
-        }
-    }
-
-
-    private fun initView() {
-        dialog = DialogUtils.showWaitDialog(requireContext(), "")
-        mBinding.externalGamesList.let {
-            it.adapter = adapter
-            it.layoutManager = LinearLayoutManager(requireContext())
-            val itemDecoration = HorizontalDividerItemDecoration.Builder(requireContext())
-                .size(2F.dip2px())
-                .color(com.gh.gamecenter.common.R.color.ui_divider.toColor(requireContext()))
-                .build()
-            if (it.itemDecorationCount != 0) {
-                it.removeItemDecorationAt(0)
-            }
-            it.addItemDecoration(itemDecoration)
-
-        }
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        if (dialog.isShowing) {
-            dialog.dismiss()
-        }
-        if (uninstallDisposable?.isDisposed != true) {
-            uninstallDisposable?.dispose()
-        }
-    }
-
-
-    override fun onItemClick(externalGameUiState: ExternalGameUiState, clickType: OnItemClickListener.ClickType) {
-        when (clickType) {
-            OnItemClickListener.ClickType.CLICK_INSTALL -> {
-                install(externalGameUiState)
-            }
-
-            OnItemClickListener.ClickType.CLICK_UNINSTALL -> {
-                uninstall(externalGameUiState)
-            }
-
-            OnItemClickListener.ClickType.CLICK_START -> {
-                start(externalGameUiState)
-            }
-        }
-    }
-
-    private fun install(externalGameUiState: ExternalGameUiState) {
-
-        VHelper.disableLaunchGameAfterInstallation()
-        VHelper.install(requireContext(), DownloadEntity().apply {
-            externalGameUiState.externalGameEntity.apply {
-                packageName = apkPackageName
-                path = apkPath
-            }
-        }, true)
-
-        VHelper.newCwValidateVspaceBeforeAction(
-            requireContext(),null,
-        ) {
-            dialog.show()
-        }
-
-    }
-
-    private fun uninstall(externalGameUiState: ExternalGameUiState) {
-        dialog.show()
-        uninstallDisposable = Single.create<Void> {
-            VHelper.uninstall(externalGameUiState.externalGameEntity.apkPackageName)
-        }.subscribeOn(Schedulers.from(AppExecutor.lightWeightIoExecutor)).observeOn(AndroidSchedulers.mainThread())
-            .subscribe { t1, t2 ->
-                if (dialog.isShowing) {
-                    dialog.dismiss()
-                }
-            }
-    }
-
-
-    private fun start(externalGameUiState: ExternalGameUiState) {
-        val intent = VirtualAppManager.get().getStartGameIntent(
-            externalGameUiState.externalGameEntity.apkPackageName,
-            "",
-            externalGameUiState.externalGameEntity.appName,
-            "",
-            MetaUtil.getBase64EncodedAndroidId(),
-            HaloApp.getInstance().gid,
-            com.gh.gamecenter.BuildConfig.VERSION_NAME,
-            HaloApp.getInstance().channel,
-            "",
-            "",
-            com.gh.gamecenter.BuildConfig.VA_VERSION_NAME,
-            HaloApp.getInstance().oaid
-        )
-        intent.setComponent(
-            ComponentName(
-                com.gh.gamecenter.BuildConfig.APPLICATION_ID,
-                VirtualAppManager.AIDL_SERVER_REMOTE_GUIDE_ACTIVITY
-            )
-        )
-        requireActivity().startActivity(intent)
-    }
-
-
-}

app/src/internal/java/com/gh/vspace/installexternalgames/InstallExternalGameViewModel.kt

@@ -1,64 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-import android.app.Application
-import android.content.pm.PackageManager
-import android.os.Environment
-import androidx.lifecycle.AndroidViewModel
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
-import com.gh.gamecenter.core.runOnIoThread
-import com.gh.vspace.VHelper
-import com.lg.vspace.helper.compat.NativeLibraryHelperCompat
-import com.lightgame.utils.Utils
-import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.disposables.Disposable
-
-class InstallExternalGameViewModel(application: Application) : AndroidViewModel(application) {
-    private val _gamesList = MutableLiveData<List<ExternalGameEntity>>(listOf())
-    val gamesList: LiveData<List<ExternalGameEntity>> = _gamesList
-    private val pkgManger = getApplication<Application>().packageManager
-    private var disposable: Disposable = VHelper.callSite.observeOn(AndroidSchedulers.mainThread()).subscribe {
-        scanPaths()
-    }
-
-    fun scanPaths() {
-        runOnIoThread {
-            _gamesList.postValue(Environment.getExternalStorageDirectory().walk().maxDepth(1)
-                .filter { it.isHidden.not() }
-                .filter { it.isFile }
-                .onEach {
-                    Utils.log(Constants.TAG, "获得文件: ${it.name}")
-                }
-                .filter { it.extension == "apk" }
-                .map {
-                    val packageInfo = pkgManger.getPackageArchiveInfo(
-                        it.absolutePath,
-                        PackageManager.GET_META_DATA or PackageManager.GET_ACTIVITIES
-                    )
-                    packageInfo?.let { packageInfo ->
-                        val applicationInfo = packageInfo.applicationInfo
-                        applicationInfo.publicSourceDir = it.absolutePath
-                        applicationInfo.sourceDir = it.absolutePath
-                        ExternalGameEntity(
-                            cpuAbi = NativeLibraryHelperCompat.getPackageAbiList(it.absolutePath),
-                            apkPath = it.absolutePath,
-                            apkFileName = it.name,
-                            apkPackageName = packageInfo.packageName,
-                            apkVersion = packageInfo.versionName,
-                            appName = pkgManger.getApplicationLabel(applicationInfo).toString(),
-                            lastModified = it.lastModified()
-                        )
-                    }
-                }.filterNotNull()
-                .toList().sortedByDescending { it.lastModified }
-            )
-        }
-    }
-
-
-    override fun onCleared() {
-        super.onCleared()
-        disposable.dispose()
-    }
-
-}

app/src/internal/java/com/gh/vspace/installexternalgames/OnItemClickListener.kt

@@ -1,11 +0,0 @@
-package com.gh.vspace.installexternalgames
-
-interface OnItemClickListener {
-
-    enum class ClickType {
-        CLICK_INSTALL, CLICK_UNINSTALL, CLICK_START
-    }
-
-    fun onItemClick(externalGameUiState: ExternalGameUiState, clickType: ClickType)
-
-}

app/src/internal/res/layout/fragment_install_external_games.xml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
-
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/external_games_list"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>

app/src/internal/res/layout/layout_external_game_item.xml

@@ -1,51 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:orientation="vertical">
-
-    <TextView
-        android:id="@+id/apk_file_info"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:textSize="20sp"
-        tools:text="文件名：\n路径：" />
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
-        <Button
-            android:id="@+id/btn_install"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="@string/text_install"
-            android:visibility="gone"
-            tools:visibility="visible" />
-
-        <Button
-            android:id="@+id/btn_update"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="@string/text_update"
-            android:visibility="visible"
-            tools:visibility="visible" />
-
-        <Button
-            android:id="@+id/btn_uninstall"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="@string/text_uninstall"
-            android:visibility="gone"
-            tools:visibility="visible" />
-
-        <Button
-            android:id="@+id/btn_start"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="@string/text_start"
-            android:visibility="gone"
-            tools:visibility="visible" />
-    </LinearLayout>
-</LinearLayout>

app/src/internal/res/values-zh-rTW/strings.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string name="title_install_external_game">從SD卡安裝</string>
-    <string name="text_install">安裝</string>
-    <string name="text_update">更新</string>
-    <string name="text_uninstall">卸載</string>
-    <string name="text_start">啟動</string>
-</resources>

app/src/internal/res/values/ids.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <item name="install_game_from_external" type="id" />
-</resources>

app/src/internal/res/values/strings.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string name="title_install_external_game">从SD卡安装</string>
-    <string name="text_install">安装</string>
-    <string name="text_update">更新</string>
-    <string name="text_uninstall">卸载</string>
-    <string name="text_start">启动</string>
-</resources>

app/src/internal/res/xml/network_security_config.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<network-security-config>
-    <base-config cleartextTrafficPermitted="true">
-        <trust-anchors>
-            <!-- Trust user added CAs while debuggable only -->
-            <certificates src="user" />
-            <certificates src="system" />
-        </trust-anchors>
-    </base-config>
-</network-security-config>

app/src/kuaishou/java/com/gh/gamecenter/KuaishouHelper.kt

@@ -1,30 +0,0 @@
-package com.gh.gamecenter
-
-import android.content.Context
-import com.kwai.monitor.log.TurboAgent
-import com.kwai.monitor.log.TurboConfig
-
-object KuaishouHelper {
-    private val mAppId by lazy { BuildConfig.SDK_APP_ID.ifEmpty { "81537" } }
-    private val mAppName by lazy { BuildConfig.SDK_APP_NAME.ifEmpty { "guanghuanzhushou_1" } }
-
-    @JvmStatic
-    fun init(context: Context, channel: String) {
-        TurboAgent.init(
-            TurboConfig.TurboConfigBuilder.create(context)
-                .setAppId(mAppId)
-                .setAppName(mAppName)
-                .setAppChannel(channel)
-                .build()
-        )
-    }
-
-    @JvmStatic
-    fun onEvent(type: String) {
-        when (type) {
-            "EVENT_ACTIVE" -> TurboAgent.onAppActive()
-            "active_register" -> TurboAgent.onRegister()
-            "EVENT_NEXTDAY_STAY" -> TurboAgent.onNextDayStay()
-        }
-    }
-}

app/src/kuaishou/java/com/gh/gamecenter/provider/FlavorProviderImp.kt

@@ -1,65 +0,0 @@
-package com.gh.gamecenter.provider
-
-import android.app.Activity
-import android.app.Application
-import android.text.TextUtils
-import com.gh.gamecenter.BuildConfig
-import com.gh.gamecenter.KuaishouHelper
-import com.gh.gamecenter.core.AppExecutor
-import com.gh.gamecenter.core.provider.IFlavorProvider
-import com.gh.gamecenter.core.utils.SPUtils
-import com.gh.gamecenter.core.utils.TimeUtils
-import com.gh.gamecenter.core.utils.ToastUtils
-import com.halo.assistant.HaloApp
-import com.kwai.monitor.payload.TurboHelper
-import com.tencent.vasdolly.helper.ChannelReaderUtil
-
-class FlavorProviderImp : IFlavorProvider {
-
-    override fun init(application: Application, activity: Activity, activateRatio: Int) {
-        KuaishouHelper.init(application, getChannelStr(application))
-
-        if (HaloApp.getInstance().isBrandNewInstall) {
-            logEvent("EVENT_ACTIVE")
-            SPUtils.setLong("TIME_OF_BRAND_NEW_INSTALL", System.currentTimeMillis() / 1000)
-        } else {
-            val shouldSendRetentionLogEvent =
-                SPUtils.getBoolean("SHOULD_SEND_RETENTION_EVENT", true)
-            val installTimeNotToday =
-                !TimeUtils.isToday(SPUtils.getLong("TIME_OF_BRAND_NEW_INSTALL", System.currentTimeMillis() / 1000))
-            if (shouldSendRetentionLogEvent && installTimeNotToday) {
-                logEvent("EVENT_NEXTDAY_STAY")
-                SPUtils.setBoolean("SHOULD_SEND_RETENTION_EVENT", false)
-            }
-        }
-    }
-
-    override fun getChannelStr(application: Application): String {
-        var channel = if (BuildConfig.USE_DEFAULT_CHANNEL_SDK) {
-            ChannelReaderUtil.getChannel(application)
-        } else {
-            TurboHelper.getChannel(application)
-        }
-        if (channel == null || TextUtils.isEmpty(channel.trim())) {
-            channel = KUAISHOU_CHANNEL
-        }
-        return channel
-    }
-
-    override fun logEvent(content: String) {
-        KuaishouHelper.onEvent(content)
-    }
-
-    override fun logCoreEvent() {
-        logEvent("EVENT_KEY_PATH_OPTIMIZATION")
-        if (BuildConfig.ACTIVATE_REPORTING_RATIO == 1) {
-            AppExecutor.uiExecutor.executeWithDelay({
-                ToastUtils.toast("关键行为 EVENT_KEY_PATH_OPTIMIZATION")
-            }, 500)
-        }
-    }
-
-    companion object {
-        private const val KUAISHOU_CHANNEL = "KS-GHZS-01"
-    }
-}

app/src/main/assets/content.js

@@ -1,163 +0,0 @@
-function requestContentFocus() {
-  $("#editor").focus();
-}
-
-function setupWhenContentEditable() {
-  var editor = $("#editor");
-  if (!editor[0].hasAttribute("contenteditable")) {
-    return;
-  }
-
-  // paste
-  editor.on("paste", function(e) {
-    e.preventDefault();
-    var text = (e.originalEvent || e).clipboardData.getData("text/plain");
-    text = text.replace(/\n/g, "<br>");
-    if ("" != text) {
-      document.execCommand("insertHTML", false, text);
-    } else {
-      window.onPasteListener.onPaste();
-    }
-  });
-
-  requestContentFocus();
-}
-
-function getStyle(dom, name) {
-  return window.getComputedStyle(dom)[name];
-}
-
-function customLinkgo(self) {
-  var datas = self.dataset.datas;
-  console.log(datas)
-  window.OnLinkClickListener.onClick(datas);
-}
-
-var typeClassList = [
-  "community_article-container",
-  "answer-container",
-  "game-container"
-];
-
-function removeDomByParent(curDom) {
-  if (curDom.parentElement) {
-    curDom.parentElement.removeChild(curDom);
-  }
-}
-
-window.addEventListener("load", function() {
-  var EditorDom = document.querySelector("#editor");
-  setupWhenContentEditable();
-
-  document.addEventListener("keydown", function(e) {
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app/src/main/assets/easygo.json

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app/src/main/assets/editor.html

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app/src/main/assets/lottie/downloadtips_dark.json

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app/src/main/assets/lottie/downloadtips_light.json

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app/src/main/assets/lottie/icon_fab_change.json

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app/src/main/assets/lottie/tab_mine.json

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app/src/main/assets/normalize.css

@@ -1,413 +0,0 @@
-/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
-
-/**
- * 1. Set default font family to sans-serif.
- * 2. Prevent iOS text size adjust after orientation change, without disabling
- *    user zoom.
- */
-
-html {
-  font-family: sans-serif; /* 1 */
-  -webkit-text-size-adjust: 100%; /* 2 */
-}
-
-/**
- * Remove default margin.
- */
-
-body {
-  margin: 0;
-}
-
-/* HTML5 display definitions
-   ========================================================================== */
-
-/**
- * Correct `block` display not defined for any HTML5 element in IE 8/9.
- * Correct `block` display not defined for `details` or `summary` in IE 10/11
- * and Firefox.
- * Correct `block` display not defined for `main` in IE 11.
- */
-
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-hgroup,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block;
-}
-
-/**
- * 1. Correct `inline-block` display not defined in IE 8/9.
- * 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
- */
-
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; /* 1 */
-  vertical-align: baseline; /* 2 */
-}
-
-/**
- * Prevent modern browsers from displaying `audio` without controls.
- * Remove excess height in iOS 5 devices.
- */
-
-audio:not([controls]) {
-  display: none;
-  height: 0;
-}
-
-/**
- * Address `[hidden]` styling not present in IE 8/9/10.
- * Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
- */
-
-[hidden],
-template {
-  display: none;
-}
-
-/* Links
-   ========================================================================== */
-
-/**
- * Remove the gray background color from active links in IE 10.
- */
-
-a {
-  background-color: transparent;
-}
-
-/**
- * Improve readability when focused and also mouse hovered in all browsers.
- */
-
-a:active,
-a:hover {
-  outline: 0;
-}
-
-/* Text-level semantics
-   ========================================================================== */
-
-/**
- * Address styling not present in IE 8/9/10/11, Safari, and Chrome.
- */
-
-abbr[title] {
-  border-bottom: 1px dotted;
-}
-
-/**
- * Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
- */
-
-b,
-strong {
-  font-weight: bold;
-}
-
-/**
- * Address styling not present in Safari and Chrome.
- */
-
-dfn {
-  font-style: italic;
-}
-
-/**
- * Address variable `h1` font-size and margin within `section` and `article`
- * contexts in Firefox 4+, Safari, and Chrome.
- */
-
-h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
-}
-
-/**
- * Address styling not present in IE 8/9.
- */
-
-mark {
-  background: #ff0;
-  color: #000;
-}
-
-/**
- * Address inconsistent and variable font size in all browsers.
- */
-
-small {
-  font-size: 80%;
-}
-
-/**
- * Prevent `sub` and `sup` affecting `line-height` in all browsers.
- */
-
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline;
-}
-
-sup {
-  top: -0.5em;
-}
-
-sub {
-  bottom: -0.25em;
-}
-
-/* Embedded content
-   ========================================================================== */
-
-/**
- * Remove border when inside `a` element in IE 8/9/10.
- */
-
-img {
-  border: 0;
-}
-
-/**
- * Correct overflow not hidden in IE 9/10/11.
- */
-
-svg:not(:root) {
-  overflow: hidden;
-}
-
-/* Grouping content
-   ========================================================================== */
-
-/**
- * Address margin not present in IE 8/9 and Safari.
- */
-
-figure {
-  margin: 1em 40px;
-}
-
-/**
- * Address differences between Firefox and other browsers.
- */
-
-hr {
-  box-sizing: content-box;
-  height: 0;
-}
-
-/**
- * Contain overflow in all browsers.
- */
-
-pre {
-  overflow: auto;
-}
-
-/**
- * Address odd `em`-unit font size rendering in all browsers.
- */
-
-code,
-kbd,
-pre,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em;
-}
-
-/* Forms
-   ========================================================================== */
-
-/**
- * Known limitation: by default, Chrome and Safari on OS X allow very limited
- * styling of `select`, unless a `border` property is set.
- */
-
-/**
- * 1. Correct color not being inherited.
- *    Known issue: affects color of disabled elements.
- * 2. Correct font properties not being inherited.
- * 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
- */
-
-button,
-input,
-optgroup,
-select,
-textarea {
-  color: inherit; /* 1 */
-  font: inherit; /* 2 */
-  margin: 0; /* 3 */
-}
-
-/**
- * Address `overflow` set to `hidden` in IE 8/9/10/11.
- */
-
-button {
-  overflow: visible;
-}
-
-/**
- * Address inconsistent `text-transform` inheritance for `button` and `select`.
- * All other form control elements do not inherit `text-transform` values.
- * Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
- * Correct `select` style inheritance in Firefox.
- */
-
-button,
-select {
-  text-transform: none;
-}
-
-/**
- * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
- *    and `video` controls.
- * 2. Correct inability to style clickable `input` types in iOS.
- * 3. Improve usability and consistency of cursor style between image-type
- *    `input` and others.
- */
-
-button,
-html input[type="button"], /* 1 */
-input[type="reset"],
-input[type="submit"] {
-  -webkit-appearance: button; /* 2 */
-  cursor: pointer; /* 3 */
-}
-
-/**
- * Re-set default cursor for disabled elements.
- */
-
-button[disabled],
-html input[disabled] {
-  cursor: default;
-}
-
-/**
- * Address Firefox 4+ setting `line-height` on `input` using `!important` in
- * the UA stylesheet.
- */
-
-input {
-  line-height: normal;
-}
-
-/**
- * It's recommended that you don't attempt to style these elements.
- * Firefox's implementation doesn't respect box-sizing, padding, or width.
- *
- * 1. Address box sizing set to `content-box` in IE 8/9/10.
- * 2. Remove excess padding in IE 8/9/10.
- */
-
-input[type="checkbox"],
-input[type="radio"] {
-  box-sizing: border-box; /* 1 */
-  padding: 0; /* 2 */
-}
-
-/**
- * Fix the cursor style for Chrome's increment/decrement buttons. For certain
- * `font-size` values of the `input`, it causes the cursor style of the
- * decrement button to change from `default` to `text`.
- */
-
-input[type="number"]::-webkit-inner-spin-button,
-input[type="number"]::-webkit-outer-spin-button {
-  height: auto;
-}
-
-/**
- * 1. Address `appearance` set to `searchfield` in Safari and Chrome.
- * 2. Address `box-sizing` set to `border-box` in Safari and Chrome
- */
-
-input[type="search"] {
-  -webkit-appearance: textfield; /* 1 */
-  -webkit-box-sizing: content-box; /* 2 */
-  box-sizing: content-box;
-}
-
-/**
- * Remove inner padding and search cancel button in Safari and Chrome on OS X.
- * Safari (but not Chrome) clips the cancel button when the search input has
- * padding (and `textfield` appearance).
- */
-
-input[type="search"]::-webkit-search-cancel-button,
-input[type="search"]::-webkit-search-decoration {
-  -webkit-appearance: none;
-}
-
-/**
- * Define consistent border, margin, and padding.
- */
-
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em;
-}
-
-/**
- * 1. Correct `color` not being inherited in IE 8/9/10/11.
- * 2. Remove padding so people aren't caught out if they zero out fieldsets.
- */
-
-legend {
-  border: 0; /* 1 */
-  padding: 0; /* 2 */
-}
-
-/**
- * Remove default vertical scrollbar in IE 8/9/10/11.
- */
-
-textarea {
-  overflow: auto;
-}
-
-/**
- * Don't inherit the `font-weight` (applied by a rule above).
- * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
- */
-
-optgroup {
-  font-weight: bold;
-}
-
-/* Tables
-   ========================================================================== */
-
-/**
- * Remove most spacing between table cells.
- */
-
-table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-
-td,
-th {
-  padding: 0;
-}

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app/src/main/assets/rich_editor.js

@@ -1,652 +0,0 @@
-/**
- * Copyright (C) 2017 Wasabeef
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// alert("")
-
-var RE = {};
-
-RE.currentSelection = {
-    "startContainer": 0,
-    "startOffset": 0,
-    "endContainer": 0,
-    "endOffset": 0};
-
-var isDebug = false;
-try {
-    isDebug = window.NativeCallBack.isNativeBuildDebug()
-} catch(error) {
-}
-
-// 引用远端的JS 和 CSS
-var script = document.createElement("script")
-document.body.appendChild(script)
-if (isDebug) {
-    script.src = "https://dev-and-static.ghzs66.com/web/js/halo.js" + "?timestamp=" + Math.round(new Date().getTime() / 1000)
-} else {
-    script.src = "https://and-static.ghzs66.com/web/js/halo.js" + "?timestamp=" + Math.round(new Date().getTime() / 1000 / 1000)
-}
-
-var style = document.createElement("link")
-style.rel = "stylesheet"
-style.type = "text/css"
-if (isDebug) {
-    style.href = "https://dev-and-static.ghzs66.com/web/css/halo.css" + "?timestamp=" + Math.round(new Date().getTime() / 1000)
-} else {
-    style.href = "https://and-static.ghzs66.com/web/css/halo.css" + "?timestamp=" + Math.round(new Date().getTime() / 1000 / 1000)
-}
-
-document.head.appendChild(style)
-
-RE.editor = document.getElementById('editor');
-
-document.addEventListener("selectionchange", function() { RE.backuprange(); });
-
-// Initializations
-RE.callback = function() {
-    window.location.href = "re-callback://" + encodeURIComponent(RE.getHtml());
-}
-
-RE.setHtml = function(contents) {
-    RE.editor.innerHTML = decodeURIComponent(contents.replace(/\+/g, '%20'));
-}
-
-// 后续初始化html代码,都用该方法
-RE.setHtmlByVideoStatus = function(contents) {
-    RE.editor.innerHTML = decodeURIComponent(contents.replace(/\+/g, '%20'));
-}
-
-// Deprecated
-RE.getHtml = function() {
-    return RE.editor.innerHTML;
-}
-
-RE.getText = function() {
-    return RE.editor.innerText;
-}
-
-RE.setBaseTextColor = function(color) {
-    RE.editor.style.color  = color;
-}
-
-RE.setBaseFontSize = function(size) {
-    RE.editor.style.fontSize = size;
-}
-
-RE.setPadding = function(left, top, right, bottom) {
-  RE.editor.style.paddingLeft = left;
-  RE.editor.style.paddingTop = top;
-  RE.editor.style.paddingRight = right;
-  RE.editor.style.paddingBottom = bottom;
-}
-
-RE.setBackgroundColor = function(color) {
-    document.body.style.backgroundColor = color;
-}
-
-RE.setBackgroundImage = function(image) {
-    RE.editor.style.backgroundImage = image;
-}
-
-RE.setWidth = function(size) {
-    RE.editor.style.minWidth = size;
-}
-
-RE.setHeight = function(size) {
-    RE.editor.style.height = size;
-}
-
-RE.setTextAlign = function(align) {
-    RE.editor.style.textAlign = align;
-}
-
-RE.setVerticalAlign = function(align) {
-    RE.editor.style.verticalAlign = align;
-}
-
-RE.setPlaceholder = function(placeholder) {
-    RE.editor.setAttribute("placeholder", placeholder);
-}
-
-RE.setEditorFocus = function() {
-    RE.editor.focus();
-}
-
-RE.setInputEnabled = function(inputEnabled) {
-    RE.editor.contentEditable = String(inputEnabled);
-}
-
-RE.formatBlock = function() {
-    document.execCommand('formatBlock', false, 'p');
-}
-
-RE.undo = function() {
-    document.execCommand('undo', false, null);
-}
-
-RE.redo = function() {
-    document.execCommand('redo', false, null);
-}
-
-RE.setBold = function() {
-    document.execCommand('bold', false, null);
-}
-
-RE.setItalic = function() {
-    document.execCommand('italic', false, null);
-}
-
-RE.setSubscript = function() {
-    document.execCommand('subscript', false, null);
-}
-
-RE.setSuperscript = function() {
-    document.execCommand('superscript', false, null);
-}
-
-RE.setStrikeThrough = function() {
-    document.execCommand('strikeThrough', false, null);
-}
-
-RE.setUnderline = function() {
-    document.execCommand('underline', false, null);
-}
-
-RE.setBullets = function() {
-    document.execCommand('insertUnorderedList', false, null);
-}
-
-RE.setNumbers = function() {
-    document.execCommand('insertOrderedList', false, null);
-}
-
-RE.setTextColor = function(color) {
-    RE.restorerange();
-    document.execCommand("styleWithCSS", null, true);
-    document.execCommand('foreColor', false, color);
-    document.execCommand("styleWithCSS", null, false);
-}
-
-RE.setTextBackgroundColor = function(color) {
-    RE.restorerange();
-    document.execCommand("styleWithCSS", null, true);
-    document.execCommand('hiliteColor', false, color);
-    document.execCommand("styleWithCSS", null, false);
-}
-
-RE.setFontSize = function(fontSize){
-    document.execCommand("fontSize", false, fontSize);
-}
-
-RE.setHeading = function(heading) {
-    document.execCommand('formatBlock', false, '<h'+heading+'>');
-    RE.sendElementNameToNative()
-}
-
-RE.setIndent = function() {
-    document.execCommand('indent', false, null);
-}
-
-RE.setOutdent = function() {
-    document.execCommand('outdent', false, null);
-}
-
-RE.setJustifyLeft = function() {
-    document.execCommand('justifyLeft', false, null);
-    RE.enabledEditingItems()
-}
-
-RE.setJustifyCenter = function() {
-    document.execCommand('justifyCenter', false, null);
-    RE.enabledEditingItems()
-}
-
-RE.setJustifyRight = function() {
-    document.execCommand('justifyRight', false, null);
-    RE.enabledEditingItems()
-}
-
-RE.setBlockquote = function() {
-    document.execCommand('formatBlock', false, '<blockquote>');
-//    var blockId = window.getSelection().focusNode.parentNode;
-//    $(blockId).addClass("haloBlock")
-    RE.sendElementNameToNative()
-}
-
-RE.insertImage = function(url) {
-    var html = "<div><img src =\"" + url + "\" style=\" max-width: 100%; display:block; margin:15px auto; height: auto;\"></div><br>"
-    RE.insertHTML(html);
-}
-
-// 设置分割线
-RE.insertHorizontalRule = function() {
-    document.execCommand('insertHorizontalRule', false, null);
-}
-
-// 设置编辑器默认换行符
-RE.setDefaultParagraphSeparator = function(separator) {
-    document.execCommand('defaultParagraphSeparator', false, separator);
-}
-
-// 替换成缩略图
-RE.replaceTbImage = function(imgRuleFlag, gifRuleFlag) {
-    var imgs = document.getElementsByTagName("img");
-    var index = 0
-    for (var i = 0; i < imgs.length; i++) {
-         var img = imgs[i];
-         var imageClassName = img.className;
-//         console.log(imageClassName)
-         if (imageClassName == "image-link" || img.className == "poster") continue;
-         if(img.src.indexOf("?") > 0) continue;
-//         console.log(i)
-         var tbImg
-         if(img.src.indexOf(".gif") > 0) {
-           tbImg = img.src + gifRuleFlag
-         } else {
-           tbImg = img.src + imgRuleFlag
-         }
-
-         img.style.cssText = "max-width: 60%; display:block; margin:15px auto; height: auto;"
-         img.src = tbImg;
-
-         if (index == 0) {
-             var bigImg = document.createElement('img');
-             bigImg.src = "file:///android_asset/web_load_dfimg_icon.png";
-             bigImg.style.cssText = "max-width: 20%; margin:15px 0 0 0; height: auto;"
-             img.parentNode.insertBefore(bigImg, img.parentNode.childNodes[0]);
-             i++;
-
-             if(img.parentNode != null) {
-                 img.parentNode.style.cssText += "text-align: left;"
-             }
-
-             if(img.parentNode != null && img.parentNode.parentNode != null) {
-                 img.parentNode.parentNode.style.cssText += "text-align: left;"
-             }
-
-         }
-         index ++;
-    }
-}
-
-// 替换成默认图
-RE.replaceAllDfImage = function(imgRuleFlag, gifRuleFlag) {
-    var imgs = document.getElementsByTagName("img");
-    for (var i = 0; i < imgs.length; i++) {
-         var img = imgs[i];
-         var imageClassName = img.className;
-         if (imageClassName == "image-link" || img.className == "poster") continue;
-         if(img.src.indexOf("web_load_dfimg_icon") > 0) {
-            img.parentNode.removeChild(img.parentNode.childNodes[0]);
-            i--;
-         } else {
-           if(img.src.indexOf(".gif") > 0) {
-              img.src = img.src.split("?")[0] + gifRuleFlag
-           } else {
-             img.src = img.src.split("?")[0] + imgRuleFlag
-           }
-         }
-    }
-
-}
-
-// 去除显示大图
-RE.hideShowBigPic = function() {
-    var imgs = document.getElementsByTagName("img");
-    var j = 0;
-    for (var i = 0; i < imgs.length; i++) {
-         var img = imgs[i];
-         var imageClassName = img.className;
-         if (imageClassName == "image-link" || img.className == "poster") continue;
-         if (img.src.indexOf(".gif") == -1) {
-            j++;
-         }
-    }
-    // 去除显示大图
-    if (j == 0) {
-       var imgs = document.getElementsByTagName("img");
-       for (var i = 0; i < imgs.length; i++) {
-           var img = imgs[i];
-           var imageClassName = img.className;
-           if (imageClassName == "image-link" || img.className == "poster") continue;
-           if(img.src.indexOf("web_load_dfimg_icon") > 0) {
-             img.parentNode.removeChild(img.parentNode.childNodes[0]);
-             break;
-           }
-       }
-    }
-}
-
-RE.replaceDfImageByUrl = function(imgUrl, imgRuleFlag, gifRuleFlag) {
-    var imgs = document.getElementsByTagName("img");
-    for (var i = 0; i < imgs.length; i++) {
-         var img = imgs[i];
-         var imageClassName = img.className;
-         if (imageClassName == "image-link" || img.className == "poster") continue;
-         if (img.src.indexOf(imgUrl) != -1) {
-             if(img.src.indexOf(".gif") > 0) {
-               img.src = img.src.split("?")[0] + gifRuleFlag
-             } else {
-               img.src = img.src.split("?")[0] + imgRuleFlag
-             }
-         }
-    }
-    RE.hideShowBigPic();
-}
-
-RE.ImageClickListener = function() {
-    var imgs = document.getElementsByTagName("img");
-    for (var i = 0; i < imgs.length; i++) {
-         var img = imgs[i];
-         var imageClassName = img.className;
-         if (imageClassName == "image-link"|| img.className == "poster") continue;
-         window.imagelistener.imageArr(img.src);
-         img.onclick = function() {
-             window.imagelistener.imageClick(this.src);
-         }
-    }
-}
-
-RE.insertHTML = function(html) {
-    RE.restorerange();
-    document.execCommand('insertHTML', false, html);
-}
-
-RE.insertLink = function(url, title) {
-    RE.restorerange();
-    var sel = document.getSelection();
-    if (sel.toString().length == 0) {
-        document.execCommand("insertHTML",false,"<a href='"+url+"'>"+title+"</a>");
-    } else if (sel.rangeCount) {
-       var el = document.createElement("a");
-       el.setAttribute("href", url);
-       el.setAttribute("title", title);
-
-       var range = sel.getRangeAt(0).cloneRange();
-       range.surroundContents(el);
-       sel.removeAllRanges();
-       sel.addRange(range);
-   }
-    RE.callback();
-}
-
-RE.setTodo = function(text) {
-    var html = '<input type="checkbox" name="'+ text +'" value="'+ text +'"/> &nbsp;';
-    document.execCommand('insertHTML', false, html);
-}
-
-RE.prepareInsert = function() {
-    RE.backuprange();
-}
-
-RE.backuprange = function(){
-    var selection = window.getSelection();
-    if (selection.rangeCount > 0) {
-      var range = selection.getRangeAt(0);
-      RE.currentSelection = {
-          "startContainer": range.startContainer,
-          "startOffset": range.startOffset,
-          "endContainer": range.endContainer,
-          "endOffset": range.endOffset};
-    }
-}
-
-RE.restorerange = function(){
-    try {
-        var selection = window.getSelection();
-        selection.removeAllRanges();
-        var range = document.createRange();
-        range.setStart(RE.currentSelection.startContainer, RE.currentSelection.startOffset);
-        range.setEnd(RE.currentSelection.endContainer, RE.currentSelection.endOffset);
-        selection.addRange(range);
-    } catch(error) {
-
-    }
-}
-
-RE.enabledEditingItems = function(e) {
-    var items = [];
-    if (document.queryCommandState('bold')) {
-        items.push('bold');
-    }
-    if (document.queryCommandState('italic')) {
-        items.push('italic');
-    }
-    if (document.queryCommandState('subscript')) {
-        items.push('subscript');
-    }
-    if (document.queryCommandState('superscript')) {
-        items.push('superscript');
-    }
-    if (document.queryCommandState('strikeThrough')) {
-        items.push('strikeThrough');
-    }
-    if (document.queryCommandState('underline')) {
-        items.push('underline');
-    }
-    if (document.queryCommandState('insertOrderedList')) {
-        items.push('orderedList');
-    }
-    if (document.queryCommandState('insertUnorderedList')) {
-        items.push('unorderedList');
-    }
-    if (document.queryCommandState('justifyCenter')) {
-        items.push('justifyCenter');
-    }
-    if (document.queryCommandState('justifyFull')) {
-        items.push('justifyFull');
-    }
-    if (document.queryCommandState('justifyLeft')) {
-        items.push('justifyLeft');
-    }
-    if (document.queryCommandState('justifyRight')) {
-        items.push('justifyRight');
-    }
-    if (document.queryCommandState('insertHorizontalRule')) {
-        items.push('horizontalRule');
-    }
-    var formatBlock = document.queryCommandValue('formatBlock');
-    if (formatBlock.length > 0) {
-        items.push(formatBlock);
-    }
-
-    window.location.href = "re-state://" + encodeURI(items.join(','));
-}
-
-RE.focus = function() {
-    var range = document.createRange();
-    range.selectNodeContents(RE.editor);
-    range.collapse(false);
-    var selection = window.getSelection();
-    selection.removeAllRanges();
-    selection.addRange(range);
-    RE.editor.focus();
-}
-
-RE.blurFocus = function() {
-    RE.editor.blur();
-}
-
-RE.removeFormat = function() {
-    document.execCommand('removeFormat', false, null);
-}
-
-RE.insertCustomStyleLink = function(data) {
-  var entity = JSON.parse(data)
-  var html =  "<br/><div class='"+ entity.type +"-container'>\n" +
-              "     <a class='"+ entity.type +"' href=\"javascript:void(0);\" contenteditable=\"false\" onclick=\"customLinkgo(this)\" data-datas='"+ data +"'>\n" +
-              "        <div class='flex-container'>\n" +
-              "        <div class='gh-internal-content img-left'>\n" +
-              "            <img class = \"image-link\" src='"+ entity.icon +"' />\n" +
-              "        </div>\n" +
-              "        <div class='gh-internal-content content-right'>\n" +
-              "            <p class='content-title'>"+ entity.title +"</p>\n" +
-              "            <p class='contents'>"+ entity.brief +"</p>\n" +
-              "        </div>\n" +
-              "        </div>\n" +
-              "        </a>\n" +
-              "    </div><br/>"
-  var tags = "", gameHtml = ""
-  if (entity.tags != null) {
-    for (var i = 0; i < entity.tags.length; i++) {
-        tags += "<label>"+ entity.tags[i]+"</label>"
-    }
-
-    gameHtml = "<br/><div class='"+ entity.type +"-container'>\n" +
-               "        <a class='"+ entity.type +"' href=\"javascript:void(0);\" contenteditable=\"false\" onclick=\"customLinkgo(this)\" data-datas='"+ data +"'>\n" +
-               "        <div class='flex-container'>\n" +
-               "            <div class='gh-internal-content img-left'>\n" +
-               "                <img class='image-link' src='"+ entity.icon +"' />\n" +
-               "            </div>\n" +
-               "            <div class='gh-internal-content content-right'>\n" +
-               "                <p class='content-title'>"+ entity.title +"</p>\n" +
-               "                <p class='tags'>"+ tags +"</p>\n" +
-               "            </div>\n" +
-               "        </div>\n" +
-               "        </a></div><br/>"
-  }
-
-  switch(entity.type) {
-    case "answer":
-      document.execCommand("insertHTML",false, html);
-      break
-    case "community_article":
-      document.execCommand("insertHTML",false, html);
-      break
-    case "game":
-      document.execCommand("insertHTML",false, gameHtml);
-      break
-  }
-  RE.callback();
-}
-
-RE.showLinkStyle = function() {
-  var answerElement = document.getElementsByClassName("answer-container");
-  for (var i=0;i<answerElement.length;i+=1){
-    answerElement[i].style.display = 'inline';
-  }
-  var articleElement = document.getElementsByClassName("community_article-container");
-  for (var i=0;i<articleElement.length;i+=1){
-    articleElement[i].style.display = 'inline';
-  }
-  var gameElement = document.getElementsByClassName("game-container");
-  for (var i=0;i<gameElement.length;i+=1){
-    gameElement[i].style.display = 'inline';
-  }
-}
-
-RE.hideLinkStyle = function() {
-  var answerElement = document.getElementsByClassName("answer-container");
-  for (var i=0;i<answerElement.length;i+=1){
-    answerElement[i].style.display = 'none';
-  }
-  var articleElement = document.getElementsByClassName("community_article-container");
-  for (var i=0;i<articleElement.length;i+=1){
-    articleElement[i].style.display = 'none';
-  }
-  var gameElement = document.getElementsByClassName("game-container");
-  for (var i=0;i<gameElement.length;i+=1){
-    gameElement[i].style.display = 'none';
-  }
-}
-
-// Event Listeners
-RE.editor.addEventListener("input", RE.callback);
-
-RE.editor.addEventListener("keyup", function(e) {
-    var KEY_LEFT = 37, KEY_RIGHT = 39;
-    if (e.which == KEY_LEFT || e.which == KEY_RIGHT) {
-        RE.enabledEditingItems(e);
-    }
-    RE.sendElementNameToNative()
-});
-
-RE.editor.addEventListener("click", function(e) {
-    RE.enabledEditingItems
-    RE.sendElementNameToNative()
-    var s = document.getSelection()
-    var isNeedRemoveR = RE.recursion(e.target)
-    if (isNeedRemoveR && s.rangeCount) {
-       s.removeAllRanges()
-    }
-});
-
-document.addEventListener("selectionchange", function(e) {
-   RE.sendElementNameToNative()
-});
-
-document.addEventListener("selectionchange", function(e) {
-   setTimeout(() => RE.enabledEditingItems(e), 10)
-});
-
-RE.recursion = function(dom) {
-    var parenDom = dom.parentElement
-    if (parenDom && parenDom instanceof Element &&
-    typeClassList.indexOf(parenDom.className) > -1) {
-      return parenDom
-    } else if(parenDom && parenDom instanceof Element &&
-    typeClassList.indexOf(parenDom.className) === -1 && parenDom.nodeName !== 'BODY') {
-      return RE.recursion(parenDom)
-    } else {
-      return null
-    }
-}
-
-// 返回组件标签 多个标签以"空格"划分
-RE.sendElementNameToNative = function() {
-    if (window.getSelection) {
-        var selection = window.getSelection()
-        if (selection.rangeCount > 0) {
-            var range = selection.getRangeAt(0);
-            var container = range.startContainer;
-            var elements = " " + container.localName + " ";
-            var parentElement;
-            while(true) {
-                if(parentElement != null) {
-                    parentElement = parentElement.parentElement
-                } else {
-                    parentElement = container.parentElement
-                }
-                if (parentElement == null || parentElement.localName == null) {
-                    break;
-                }
-                elements = elements + " " + parentElement.localName + " "
-            }
-//            console.log(elements)
-            window.OnCursorChangeListener.onElements(elements);
-        }
-    }
-}
-
-// android function to open link
-function customLinkgo(self) {
-  var datas = self.dataset.datas
-  window.OnLinkClickListener.onClick(datas)
-}
-
-// 在web页面播放视频
-//RE.initArticleVideo = function(){
-//    initArticleVideo()
-//}
-
-function showNativeDialog(title, message, positive, negative, callback) {
-    var jsCallbackCode = "(" + function (v) {
-        window.onNativeDialogCallback(v);
-        delete window.onNativeDialogCallback;
-    }.toString() + ")";
-
-    window.onNativeDialogCallback = callback;
-    window.NativeCallBack.showDialog(title, message, positive, negative, jsCallbackCode);
-}

app/src/main/assets/style.css

@@ -1,42 +0,0 @@
-/**
- * Copyright (C) 2017 Wasabeef
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-@charset "UTF-8";
-
-
-html {
-  height: 100%;
-}
-
-body {
-  overflow: scroll;
-  display: table;
-  table-layout: fixed;
-  width: 100%;
-  min-height:100%;
-}
-
-#editor {
-  outline: 0px solid transparent;
-  background-repeat: no-repeat;
-  background-position: center;
-  background-size: cover;
-}
-
-#editor[placeholder]:empty:not(:focus):before {
-  content: attr(placeholder);
-  opacity: .5;
-}}

app/src/main/java/android/support/v7/widget/AdapterHelper.java

@@ -0,0 +1,699 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+
+import android.support.v4.util.Pools;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import static android.support.v7.widget.RecyclerView.ViewHolder;
+
+/**
+ * Helper class that can enqueue and process adapter update operations.
+ * <p>
+ * To support animations, RecyclerView presents an older version the Adapter to best represent
+ * previous state of the layout. Sometimes, this is not trivial when items are removed that were
+ * not laid out, in which case, RecyclerView has no way of providing that item's view for
+ * animations.
+ * <p>
+ * AdapterHelper creates an UpdateOp for each adapter data change then pre-processes them. During
+ * pre processing, AdapterHelper finds out which UpdateOps can be deferred to second layout pass
+ * and which cannot. For the UpdateOps that cannot be deferred, AdapterHelper will change them
+ * according to previously deferred operation and dispatch them before the first layout pass. It
+ * also takes care of updating deferred UpdateOps since order of operations is changed by this
+ * process.
+ * <p>
+ * Although operations may be forwarded to LayoutManager in different orders, resulting data set
+ * is guaranteed to be the consistent.
+ */
+class AdapterHelper implements OpReorderer.Callback {
+
+    final static int POSITION_TYPE_INVISIBLE = 0;
+
+    final static int POSITION_TYPE_NEW_OR_LAID_OUT = 1;
+
+    private static final boolean DEBUG = false;
+
+    private static final String TAG = "AHT";
+
+    private Pools.Pool<UpdateOp> mUpdateOpPool = new Pools.SimplePool<UpdateOp>(UpdateOp.POOL_SIZE);
+
+    final ArrayList<UpdateOp> mPendingUpdates = new ArrayList<UpdateOp>();
+
+    final ArrayList<UpdateOp> mPostponedList = new ArrayList<UpdateOp>();
+
+    final Callback mCallback;
+
+    Runnable mOnItemProcessedCallback;
+
+    final boolean mDisableRecycler;
+
+    final OpReorderer mOpReorderer;
+
+    AdapterHelper(Callback callback) {
+        this(callback, false);
+    }
+
+    AdapterHelper(Callback callback, boolean disableRecycler) {
+        mCallback = callback;
+        mDisableRecycler = disableRecycler;
+        mOpReorderer = new OpReorderer(this);
+    }
+
+    AdapterHelper addUpdateOp(UpdateOp... ops) {
+        Collections.addAll(mPendingUpdates, ops);
+        return this;
+    }
+
+    void reset() {
+        recycleUpdateOpsAndClearList(mPendingUpdates);
+        recycleUpdateOpsAndClearList(mPostponedList);
+    }
+
+    void preProcess() {
+        mOpReorderer.reorderOps(mPendingUpdates);
+        final int count = mPendingUpdates.size();
+        for (int i = 0; i < count; i++) {
+            UpdateOp op = mPendingUpdates.get(i);
+            switch (op.cmd) {
+                case UpdateOp.ADD:
+                    applyAdd(op);
+                    break;
+                case UpdateOp.REMOVE:
+                    applyRemove(op);
+                    break;
+                case UpdateOp.UPDATE:
+                    applyUpdate(op);
+                    break;
+                case UpdateOp.MOVE:
+                    applyMove(op);
+                    break;
+            }
+            if (mOnItemProcessedCallback != null) {
+                mOnItemProcessedCallback.run();
+            }
+        }
+        mPendingUpdates.clear();
+    }
+
+    void consumePostponedUpdates() {
+        final int count = mPostponedList.size();
+        for (int i = 0; i < count; i++) {
+            mCallback.onDispatchSecondPass(mPostponedList.get(i));
+        }
+        recycleUpdateOpsAndClearList(mPostponedList);
+    }
+
+    private void applyMove(UpdateOp op) {
+        // MOVE ops are pre-processed so at this point, we know that item is still in the adapter.
+        // otherwise, it would be converted into a REMOVE operation
+        postponeAndUpdateViewHolders(op);
+    }
+
+    private void applyRemove(UpdateOp op) {
+        int tmpStart = op.positionStart;
+        int tmpCount = 0;
+        int tmpEnd = op.positionStart + op.itemCount;
+        int type = -1;
+        for (int position = op.positionStart; position < tmpEnd; position++) {
+            boolean typeChanged = false;
+            ViewHolder vh = mCallback.findViewHolder(position);
+            if (vh != null || canFindInPreLayout(position)) {
+                // If a ViewHolder exists or this is a newly added item, we can defer this update
+                // to post layout stage.
+                // * For existing ViewHolders, we'll fake its existence in the pre-layout phase.
+                // * For items that are added and removed in the same process cycle, they won't
+                // have any effect in pre-layout since their add ops are already deferred to
+                // post-layout pass.
+                if (type == POSITION_TYPE_INVISIBLE) {
+                    // Looks like we have other updates that we cannot merge with this one.
+                    // Create an UpdateOp and dispatch it to LayoutManager.
+                    UpdateOp newOp = obtainUpdateOp(UpdateOp.REMOVE, tmpStart, tmpCount);
+                    dispatchAndUpdateViewHolders(newOp);
+                    typeChanged = true;
+                }
+                type = POSITION_TYPE_NEW_OR_LAID_OUT;
+            } else {
+                // This update cannot be recovered because we don't have a ViewHolder representing
+                // this position. Instead, post it to LayoutManager immediately
+                if (type == POSITION_TYPE_NEW_OR_LAID_OUT) {
+                    // Looks like we have other updates that we cannot merge with this one.
+                    // Create UpdateOp op and dispatch it to LayoutManager.
+                    UpdateOp newOp = obtainUpdateOp(UpdateOp.REMOVE, tmpStart, tmpCount);
+                    postponeAndUpdateViewHolders(newOp);
+                    typeChanged = true;
+                }
+                type = POSITION_TYPE_INVISIBLE;
+            }
+            if (typeChanged) {
+                position -= tmpCount; // also equal to tmpStart
+                tmpEnd -= tmpCount;
+                tmpCount = 1;
+            } else {
+                tmpCount++;
+            }
+        }
+        if (tmpCount != op.itemCount) { // all 1 effect
+            recycleUpdateOp(op);
+            op = obtainUpdateOp(UpdateOp.REMOVE, tmpStart, tmpCount);
+        }
+        if (type == POSITION_TYPE_INVISIBLE) {
+            dispatchAndUpdateViewHolders(op);
+        } else {
+            postponeAndUpdateViewHolders(op);
+        }
+    }
+
+    private void applyUpdate(UpdateOp op) {
+        int tmpStart = op.positionStart;
+        int tmpCount = 0;
+        int tmpEnd = op.positionStart + op.itemCount;
+        int type = -1;
+        for (int position = op.positionStart; position < tmpEnd; position++) {
+            ViewHolder vh = mCallback.findViewHolder(position);
+            if (vh != null || canFindInPreLayout(position)) { // deferred
+                if (type == POSITION_TYPE_INVISIBLE) {
+                    UpdateOp newOp = obtainUpdateOp(UpdateOp.UPDATE, tmpStart, tmpCount);
+                    dispatchAndUpdateViewHolders(newOp);
+                    tmpCount = 0;
+                    tmpStart = position;
+                }
+                type = POSITION_TYPE_NEW_OR_LAID_OUT;
+            } else { // applied
+                if (type == POSITION_TYPE_NEW_OR_LAID_OUT) {
+                    UpdateOp newOp = obtainUpdateOp(UpdateOp.UPDATE, tmpStart, tmpCount);
+                    postponeAndUpdateViewHolders(newOp);
+                    tmpCount = 0;
+                    tmpStart = position;
+                }
+                type = POSITION_TYPE_INVISIBLE;
+            }
+            tmpCount++;
+        }
+        if (tmpCount != op.itemCount) { // all 1 effect
+            recycleUpdateOp(op);
+            op = obtainUpdateOp(UpdateOp.UPDATE, tmpStart, tmpCount);
+        }
+        if (type == POSITION_TYPE_INVISIBLE) {
+            dispatchAndUpdateViewHolders(op);
+        } else {
+            postponeAndUpdateViewHolders(op);
+        }
+    }
+
+    private void dispatchAndUpdateViewHolders(UpdateOp op) {
+        // tricky part.
+        // traverse all postpones and revert their changes on this op if necessary, apply updated
+        // dispatch to them since now they are after this op.
+        if (op.cmd == UpdateOp.ADD || op.cmd == UpdateOp.MOVE) {
+            throw new IllegalArgumentException("should not dispatch add or move for pre layout");
+        }
+        if (DEBUG) {
+            Log.d(TAG, "dispatch (pre)" + op);
+            Log.d(TAG, "postponed state before:");
+            for (UpdateOp updateOp : mPostponedList) {
+                Log.d(TAG, updateOp.toString());
+            }
+            Log.d(TAG, "----");
+        }
+
+        // handle each pos 1 by 1 to ensure continuity. If it breaks, dispatch partial
+        // TODO Since move ops are pushed to end, we should not need this anymore
+        int tmpStart = updatePositionWithPostponed(op.positionStart, op.cmd);
+        if (DEBUG) {
+            Log.d(TAG, "pos:" + op.positionStart + ",updatedPos:" + tmpStart);
+        }
+        int tmpCnt = 1;
+        int offsetPositionForPartial = op.positionStart;
+        final int positionMultiplier;
+        switch (op.cmd) {
+            case UpdateOp.UPDATE:
+                positionMultiplier = 1;
+                break;
+            case UpdateOp.REMOVE:
+                positionMultiplier = 0;
+                break;
+            default:
+                throw new IllegalArgumentException("op should be remove or update." + op);
+        }
+        for (int p = 1; p < op.itemCount; p++) {
+            final int pos = op.positionStart + (positionMultiplier * p);
+            int updatedPos = updatePositionWithPostponed(pos, op.cmd);
+            if (DEBUG) {
+                Log.d(TAG, "pos:" + pos + ",updatedPos:" + updatedPos);
+            }
+            boolean continuous = false;
+            switch (op.cmd) {
+                case UpdateOp.UPDATE:
+                    continuous = updatedPos == tmpStart + 1;
+                    break;
+                case UpdateOp.REMOVE:
+                    continuous = updatedPos == tmpStart;
+                    break;
+            }
+            if (continuous) {
+                tmpCnt++;
+            } else {
+                // need to dispatch this separately
+                UpdateOp tmp = obtainUpdateOp(op.cmd, tmpStart, tmpCnt);
+                if (DEBUG) {
+                    Log.d(TAG, "need to dispatch separately " + tmp);
+                }
+                dispatchFirstPassAndUpdateViewHolders(tmp, offsetPositionForPartial);
+                recycleUpdateOp(tmp);
+                if (op.cmd == UpdateOp.UPDATE) {
+                    offsetPositionForPartial += tmpCnt;
+                }
+                tmpStart = updatedPos;// need to remove previously dispatched
+                tmpCnt = 1;
+            }
+        }
+        recycleUpdateOp(op);
+        if (tmpCnt > 0) {
+            UpdateOp tmp = obtainUpdateOp(op.cmd, tmpStart, tmpCnt);
+            if (DEBUG) {
+                Log.d(TAG, "dispatching:" + tmp);
+            }
+            dispatchFirstPassAndUpdateViewHolders(tmp, offsetPositionForPartial);
+            recycleUpdateOp(tmp);
+        }
+        if (DEBUG) {
+            Log.d(TAG, "post dispatch");
+            Log.d(TAG, "postponed state after:");
+            for (UpdateOp updateOp : mPostponedList) {
+                Log.d(TAG, updateOp.toString());
+            }
+            Log.d(TAG, "----");
+        }
+    }
+
+    void dispatchFirstPassAndUpdateViewHolders(UpdateOp op, int offsetStart) {
+        mCallback.onDispatchFirstPass(op);
+        switch (op.cmd) {
+            case UpdateOp.REMOVE:
+                mCallback.offsetPositionsForRemovingInvisible(offsetStart, op.itemCount);
+                break;
+            case UpdateOp.UPDATE:
+                mCallback.markViewHoldersUpdated(offsetStart, op.itemCount);
+                break;
+            default:
+                throw new IllegalArgumentException("only remove and update ops can be dispatched"
+                        + " in first pass");
+        }
+    }
+
+    private int updatePositionWithPostponed(int pos, int cmd) {
+        final int count = mPostponedList.size();
+        for (int i = count - 1; i >= 0; i--) {
+            UpdateOp postponed = mPostponedList.get(i);
+            if (postponed.cmd == UpdateOp.MOVE) {
+                int start, end;
+                if (postponed.positionStart < postponed.itemCount) {
+                    start = postponed.positionStart;
+                    end = postponed.itemCount;
+                } else {
+                    start = postponed.itemCount;
+                    end = postponed.positionStart;
+                }
+                if (pos >= start && pos <= end) {
+                    //i'm affected
+                    if (start == postponed.positionStart) {
+                        if (cmd == UpdateOp.ADD) {
+                            postponed.itemCount++;
+                        } else if (cmd == UpdateOp.REMOVE) {
+                            postponed.itemCount--;
+                        }
+                        // op moved to left, move it right to revert
+                        pos++;
+                    } else {
+                        if (cmd == UpdateOp.ADD) {
+                            postponed.positionStart++;
+                        } else if (cmd == UpdateOp.REMOVE) {
+                            postponed.positionStart--;
+                        }
+                        // op was moved right, move left to revert
+                        pos--;
+                    }
+                } else if (pos < postponed.positionStart) {
+                    // postponed MV is outside the dispatched OP. if it is before, offset
+                    if (cmd == UpdateOp.ADD) {
+                        postponed.positionStart++;
+                        postponed.itemCount++;
+                    } else if (cmd == UpdateOp.REMOVE) {
+                        postponed.positionStart--;
+                        postponed.itemCount--;
+                    }
+                }
+            } else {
+                if (postponed.positionStart <= pos) {
+                    if (postponed.cmd == UpdateOp.ADD) {
+                        pos -= postponed.itemCount;
+                    } else if (postponed.cmd == UpdateOp.REMOVE) {
+                        pos += postponed.itemCount;
+                    }
+                } else {
+                    if (cmd == UpdateOp.ADD) {
+                        postponed.positionStart++;
+                    } else if (cmd == UpdateOp.REMOVE) {
+                        postponed.positionStart--;
+                    }
+                }
+            }
+            if (DEBUG) {
+                Log.d(TAG, "dispath (step" + i + ")");
+                Log.d(TAG, "postponed state:" + i + ", pos:" + pos);
+                for (UpdateOp updateOp : mPostponedList) {
+                    Log.d(TAG, updateOp.toString());
+                }
+                Log.d(TAG, "----");
+            }
+        }
+        for (int i = mPostponedList.size() - 1; i >= 0; i--) {
+            UpdateOp op = mPostponedList.get(i);
+            if (op.cmd == UpdateOp.MOVE) {
+                if (op.itemCount == op.positionStart || op.itemCount < 0) {
+                    mPostponedList.remove(i);
+                    recycleUpdateOp(op);
+                }
+            } else if (op.itemCount <= 0) {
+                mPostponedList.remove(i);
+                recycleUpdateOp(op);
+            }
+        }
+        return pos;
+    }
+
+    private boolean canFindInPreLayout(int position) {
+        final int count = mPostponedList.size();
+        for (int i = 0; i < count; i++) {
+            UpdateOp op = mPostponedList.get(i);
+            if (op.cmd == UpdateOp.MOVE) {
+                if (findPositionOffset(op.itemCount, i + 1) == position) {
+                    return true;
+                }
+            } else if (op.cmd == UpdateOp.ADD) {
+                // TODO optimize.
+                final int end = op.positionStart + op.itemCount;
+                for (int pos = op.positionStart; pos < end; pos++) {
+                    if (findPositionOffset(pos, i + 1) == position) {
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    private void applyAdd(UpdateOp op) {
+        postponeAndUpdateViewHolders(op);
+    }
+
+    private void postponeAndUpdateViewHolders(UpdateOp op) {
+        if (DEBUG) {
+            Log.d(TAG, "postponing " + op);
+        }
+//        Utils.log("add UpdateOp to PostponedList");
+        mPostponedList.add(op);
+//        Utils.log("op" + op.positionStart + "=" + op.itemCount);
+        switch (op.cmd) {
+            case UpdateOp.ADD:
+                mCallback.offsetPositionsForAdd(op.positionStart, op.itemCount);
+                break;
+            case UpdateOp.MOVE:
+                mCallback.offsetPositionsForMove(op.positionStart, op.itemCount);
+                break;
+            case UpdateOp.REMOVE:
+                mCallback.offsetPositionsForRemovingLaidOutOrNewView(op.positionStart,
+                        op.itemCount);
+                break;
+            case UpdateOp.UPDATE:
+                mCallback.markViewHoldersUpdated(op.positionStart, op.itemCount);
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown update op type for " + op);
+        }
+    }
+
+    boolean hasPendingUpdates() {
+        return mPendingUpdates.size() > 0;
+    }
+
+    int findPositionOffset(int position) {
+        return findPositionOffset(position, 0);
+    }
+
+    int findPositionOffset(int position, int firstPostponedItem) {
+        int count = mPostponedList.size();
+        for (int i = firstPostponedItem; i < count; ++i) {
+            UpdateOp op = mPostponedList.get(i);
+            if (op.cmd == UpdateOp.MOVE) {
+                if (op.positionStart == position) {
+                    position = op.itemCount;
+                } else {
+                    if (op.positionStart < position) {
+                        position--; // like a remove
+                    }
+                    if (op.itemCount <= position) {
+                        position++; // like an add
+                    }
+                }
+            } else if (op.positionStart <= position) {
+                if (op.cmd == UpdateOp.REMOVE) {
+                    if (position < op.positionStart + op.itemCount) {
+                        return -1;
+                    }
+                    position -= op.itemCount;
+                } else if (op.cmd == UpdateOp.ADD) {
+                    position += op.itemCount;
+                }
+            }
+        }
+        return position;
+    }
+
+    /**
+     * @return True if updates should be processed.
+     */
+    boolean onItemRangeChanged(int positionStart, int itemCount) {
+        mPendingUpdates.add(obtainUpdateOp(UpdateOp.UPDATE, positionStart, itemCount));
+        return mPendingUpdates.size() == 1;
+    }
+
+    /**
+     * @return True if updates should be processed.
+     */
+    boolean onItemRangeInserted(int positionStart, int itemCount) {
+        mPendingUpdates.add(obtainUpdateOp(UpdateOp.ADD, positionStart, itemCount));
+        return mPendingUpdates.size() == 1;
+    }
+
+    /**
+     * @return True if updates should be processed.
+     */
+    boolean onItemRangeRemoved(int positionStart, int itemCount) {
+        mPendingUpdates.add(obtainUpdateOp(UpdateOp.REMOVE, positionStart, itemCount));
+        return mPendingUpdates.size() == 1;
+    }
+
+    /**
+     * @return True if updates should be processed.
+     */
+    boolean onItemRangeMoved(int from, int to, int itemCount) {
+        if (from == to) {
+            return false;//no-op
+        }
+        if (itemCount != 1) {
+            throw new IllegalArgumentException("Moving more than 1 item is not supported yet");
+        }
+        mPendingUpdates.add(obtainUpdateOp(UpdateOp.MOVE, from, to));
+        return mPendingUpdates.size() == 1;
+    }
+
+    /**
+     * Skips pre-processing and applies all updates in one pass.
+     */
+    void consumeUpdatesInOnePass() {
+        // we still consume postponed updates (if there is) in case there was a pre-process call
+        // w/o a matching consumePostponedUpdates.
+        consumePostponedUpdates();
+        final int count = mPendingUpdates.size();
+        for (int i = 0; i < count; i++) {
+            UpdateOp op = mPendingUpdates.get(i);
+            switch (op.cmd) {
+                case UpdateOp.ADD:
+                    mCallback.onDispatchSecondPass(op);
+                    mCallback.offsetPositionsForAdd(op.positionStart, op.itemCount);
+                    break;
+                case UpdateOp.REMOVE:
+                    mCallback.onDispatchSecondPass(op);
+                    mCallback.offsetPositionsForRemovingInvisible(op.positionStart, op.itemCount);
+                    break;
+                case UpdateOp.UPDATE:
+                    mCallback.onDispatchSecondPass(op);
+                    mCallback.markViewHoldersUpdated(op.positionStart, op.itemCount);
+                    break;
+                case UpdateOp.MOVE:
+                    mCallback.onDispatchSecondPass(op);
+                    mCallback.offsetPositionsForMove(op.positionStart, op.itemCount);
+                    break;
+            }
+            if (mOnItemProcessedCallback != null) {
+                mOnItemProcessedCallback.run();
+            }
+        }
+        recycleUpdateOpsAndClearList(mPendingUpdates);
+    }
+
+    /**
+     * Queued operation to happen when child views are updated.
+     */
+    static class UpdateOp {
+
+        static final int ADD = 0;
+
+        static final int REMOVE = 1;
+
+        static final int UPDATE = 2;
+
+        static final int MOVE = 3;
+
+        static final int POOL_SIZE = 30;
+
+        int cmd;
+
+        int positionStart;
+
+        // holds the target position if this is a MOVE
+        int itemCount;
+
+        UpdateOp(int cmd, int positionStart, int itemCount) {
+            this.cmd = cmd;
+            this.positionStart = positionStart;
+            this.itemCount = itemCount;
+        }
+
+        String cmdToString() {
+            switch (cmd) {
+                case ADD:
+                    return "add";
+                case REMOVE:
+                    return "rm";
+                case UPDATE:
+                    return "up";
+                case MOVE:
+                    return "mv";
+            }
+            return "??";
+        }
+
+        @Override
+        public String toString() {
+            return "[" + cmdToString() + ",s:" + positionStart + "c:" + itemCount + "]";
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+
+            UpdateOp op = (UpdateOp) o;
+
+            if (cmd != op.cmd) {
+                return false;
+            }
+            if (cmd == MOVE && Math.abs(itemCount - positionStart) == 1) {
+                // reverse of this is also true
+                if (itemCount == op.positionStart && positionStart == op.itemCount) {
+                    return true;
+                }
+            }
+            if (itemCount != op.itemCount) {
+                return false;
+            }
+            if (positionStart != op.positionStart) {
+                return false;
+            }
+
+            return true;
+        }
+
+        @Override
+        public int hashCode() {
+            int result = cmd;
+            result = 31 * result + positionStart;
+            result = 31 * result + itemCount;
+            return result;
+        }
+    }
+
+    @Override
+    public UpdateOp obtainUpdateOp(int cmd, int positionStart, int itemCount) {
+        UpdateOp op = mUpdateOpPool.acquire();
+        if (op == null) {
+            op = new UpdateOp(cmd, positionStart, itemCount);
+        } else {
+            op.cmd = cmd;
+            op.positionStart = positionStart;
+            op.itemCount = itemCount;
+        }
+        return op;
+    }
+
+    @Override
+    public void recycleUpdateOp(UpdateOp op) {
+        if (!mDisableRecycler) {
+            mUpdateOpPool.release(op);
+        }
+    }
+
+    void recycleUpdateOpsAndClearList(List<UpdateOp> ops) {
+        final int count = ops.size();
+        for (int i = 0; i < count; i++) {
+            recycleUpdateOp(ops.get(i));
+        }
+        ops.clear();
+    }
+
+    /**
+     * Contract between AdapterHelper and RecyclerView.
+     */
+    static interface Callback {
+
+        ViewHolder findViewHolder(int position);
+
+        void offsetPositionsForRemovingInvisible(int positionStart, int itemCount);
+
+        void offsetPositionsForRemovingLaidOutOrNewView(int positionStart, int itemCount);
+
+        void markViewHoldersUpdated(int positionStart, int itemCount);
+
+        void onDispatchFirstPass(UpdateOp updateOp);
+
+        void onDispatchSecondPass(UpdateOp updateOp);
+
+        void offsetPositionsForAdd(int positionStart, int itemCount);
+
+        void offsetPositionsForMove(int from, int to);
+    }
+}

app/src/main/java/android/support/v7/widget/ChildHelper.java

@@ -0,0 +1,484 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Helper class to manage children.
+ * <p>
+ * It wraps a RecyclerView and adds ability to hide some children. There are two sets of methods
+ * provided by this class. <b>Regular</b> methods are the ones that replicate ViewGroup methods
+ * like getChildAt, getChildCount etc. These methods ignore hidden children.
+ * <p>
+ * When RecyclerView needs direct access to the view group children, it can call unfiltered
+ * methods like get getUnfilteredChildCount or getUnfilteredChildAt.
+ */
+class ChildHelper {
+
+    private static final boolean DEBUG = false;
+
+    private static final String TAG = "ChildrenHelper";
+
+    final Callback mCallback;
+
+    final Bucket mBucket;
+
+    final List<View> mHiddenViews;
+
+    ChildHelper(Callback callback) {
+        mCallback = callback;
+        mBucket = new Bucket();
+        mHiddenViews = new ArrayList<View>();
+    }
+
+    /**
+     * Adds a view to the ViewGroup
+     *
+     * @param child  View to add.
+     * @param hidden If set to true, this item will be invisible from regular methods.
+     */
+    void addView(View child, boolean hidden) {
+        addView(child, -1, hidden);
+    }
+
+    /**
+     * Add a view to the ViewGroup at an index
+     *
+     * @param child  View to add.
+     * @param index  Index of the child from the regular perspective (excluding hidden views).
+     *               ChildHelper offsets this index to actual ViewGroup index.
+     * @param hidden If set to true, this item will be invisible from regular methods.
+     */
+    void addView(View child, int index, boolean hidden) {
+        final int offset;
+        if (index < 0) {
+            offset = mCallback.getChildCount();
+        } else {
+            offset = getOffset(index);
+        }
+        mCallback.addView(child, offset);
+        mBucket.insert(offset, hidden);
+        if (hidden) {
+            mHiddenViews.add(child);
+        }
+        if (DEBUG) {
+            Log.d(TAG, "addViewAt " + index + ",h:" + hidden + ", " + this);
+        }
+    }
+
+    private int getOffset(int index) {
+        if (index < 0) {
+            return -1; //anything below 0 won't work as diff will be undefined.
+        }
+        final int limit = mCallback.getChildCount();
+        int offset = index;
+        while (offset < limit) {
+            final int removedBefore = mBucket.countOnesBefore(offset);
+            final int diff = index - (offset - removedBefore);
+            if (diff == 0) {
+                while (mBucket.get(offset)) { // ensure this offset is not hidden
+                    offset ++;
+                }
+                return offset;
+            } else {
+                offset += diff;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Removes the provided View from underlying RecyclerView.
+     *
+     * @param view The view to remove.
+     */
+    void removeView(View view) {
+        int index = mCallback.indexOfChild(view);
+        if (index < 0) {
+            return;
+        }
+        mCallback.removeViewAt(index);
+        if (mBucket.remove(index)) {
+            mHiddenViews.remove(view);
+        }
+        if (DEBUG) {
+            Log.d(TAG, "remove View off:" + index + "," + this);
+        }
+    }
+
+    /**
+     * Removes the view at the provided index from RecyclerView.
+     *
+     * @param index Index of the child from the regular perspective (excluding hidden views).
+     *              ChildHelper offsets this index to actual ViewGroup index.
+     */
+    void removeViewAt(int index) {
+        final int offset = getOffset(index);
+        final View view = mCallback.getChildAt(offset);
+        if (view == null) {
+            return;
+        }
+        mCallback.removeViewAt(offset);
+        if (mBucket.remove(offset)) {
+            mHiddenViews.remove(view);
+        }
+        if (DEBUG) {
+            Log.d(TAG, "removeViewAt " + index + ", off:" + offset + ", " + this);
+        }
+    }
+
+    /**
+     * Returns the child at provided index.
+     *
+     * @param index Index of the child to return in regular perspective.
+     */
+    View getChildAt(int index) {
+        final int offset = getOffset(index);
+        return mCallback.getChildAt(offset);
+    }
+
+    /**
+     * Removes all views from the ViewGroup including the hidden ones.
+     */
+    void removeAllViewsUnfiltered() {
+        mCallback.removeAllViews();
+        mBucket.reset();
+        mHiddenViews.clear();
+        if (DEBUG) {
+            Log.d(TAG, "removeAllViewsUnfiltered");
+        }
+    }
+
+    /**
+     * This can be used to find a disappearing view by position.
+     *
+     * @param position The adapter position of the item.
+     * @param type     View type, can be {@link RecyclerView#INVALID_TYPE}.
+     * @return         A hidden view with a valid ViewHolder that matches the position and type.
+     */
+    View findHiddenNonRemovedView(int position, int type) {
+        final int count = mHiddenViews.size();
+        for (int i = 0; i < count; i++) {
+            final View view = mHiddenViews.get(i);
+            RecyclerView.ViewHolder holder = mCallback.getChildViewHolder(view);
+            if (holder.getPosition() == position && !holder.isInvalid() &&
+                    (type == RecyclerView.INVALID_TYPE || holder.getItemViewType() == type)) {
+                return view;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Attaches the provided view to the underlying ViewGroup.
+     *
+     * @param child        Child to attach.
+     * @param index        Index of the child to attach in regular perspective.
+     * @param layoutParams LayoutParams for the child.
+     * @param hidden       If set to true, this item will be invisible to the regular methods.
+     */
+    void attachViewToParent(View child, int index, ViewGroup.LayoutParams layoutParams,
+            boolean hidden) {
+        final int offset;
+        if (index < 0) {
+            offset = mCallback.getChildCount();
+        } else {
+            offset = getOffset(index);
+        }
+        mCallback.attachViewToParent(child, offset, layoutParams);
+        mBucket.insert(offset, hidden);
+        if (DEBUG) {
+            Log.d(TAG, "attach view to parent index:" + index + ",off:" + offset + "," +
+                    "h:" + hidden + ", " + this);
+        }
+    }
+
+    /**
+     * Returns the number of children that are not hidden.
+     *
+     * @return Number of children that are not hidden.
+     * @see #getChildAt(int)
+     */
+    int getChildCount() {
+        return mCallback.getChildCount() - mHiddenViews.size();
+    }
+
+    /**
+     * Returns the total number of children.
+     *
+     * @return The total number of children including the hidden views.
+     * @see #getUnfilteredChildAt(int)
+     */
+    int getUnfilteredChildCount() {
+        return mCallback.getChildCount();
+    }
+
+    /**
+     * Returns a child by ViewGroup offset. ChildHelper won't offset this index.
+     *
+     * @param index ViewGroup index of the child to return.
+     * @return The view in the provided index.
+     */
+    View getUnfilteredChildAt(int index) {
+        return mCallback.getChildAt(index);
+    }
+
+    /**
+     * Detaches the view at the provided index.
+     *
+     * @param index Index of the child to return in regular perspective.
+     */
+    void detachViewFromParent(int index) {
+        final int offset = getOffset(index);
+        mCallback.detachViewFromParent(offset);
+        mBucket.remove(offset);
+        if (DEBUG) {
+            Log.d(TAG, "detach view from parent " + index + ", off:" + offset);
+        }
+    }
+
+    /**
+     * Returns the index of the child in regular perspective.
+     *
+     * @param child The child whose index will be returned.
+     * @return The regular perspective index of the child or -1 if it does not exists.
+     */
+    int indexOfChild(View child) {
+        final int index = mCallback.indexOfChild(child);
+        if (index == -1) {
+            return -1;
+        }
+        if (mBucket.get(index)) {
+            if (DEBUG) {
+                throw new IllegalArgumentException("cannot get index of a hidden child");
+            } else {
+                return -1;
+            }
+        }
+        // reverse the index
+        return index - mBucket.countOnesBefore(index);
+    }
+
+    /**
+     * Returns whether a View is visible to LayoutManager or not.
+     *
+     * @param view The child view to check. Should be a child of the Callback.
+     * @return True if the View is not visible to LayoutManager
+     */
+    boolean isHidden(View view) {
+        return mHiddenViews.contains(view);
+    }
+
+    /**
+     * Marks a child view as hidden.
+     *
+     * @param view The view to hide.
+     */
+    void hide(View view) {
+        final int offset = mCallback.indexOfChild(view);
+        if (offset < 0) {
+            throw new IllegalArgumentException("view is not a child, cannot hide " + view);
+        }
+        if (DEBUG && mBucket.get(offset)) {
+            throw new RuntimeException("trying to hide same view twice, how come ? " + view);
+        }
+        mBucket.set(offset);
+        mHiddenViews.add(view);
+        if (DEBUG) {
+            Log.d(TAG, "hiding child " + view + " at offset " + offset+ ", " + this);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return mBucket.toString();
+    }
+
+    /**
+     * Removes a view from the ViewGroup if it is hidden.
+     *
+     * @param view The view to remove.
+     * @return True if the View is found and it is hidden. False otherwise.
+     */
+    boolean removeViewIfHidden(View view) {
+        final int index = mCallback.indexOfChild(view);
+        if (index == -1) {
+            if (mHiddenViews.remove(view) && DEBUG) {
+                throw new IllegalStateException("view is in hidden list but not in view group");
+            }
+            return true;
+        }
+        if (mBucket.get(index)) {
+            mBucket.remove(index);
+            mCallback.removeViewAt(index);
+            if (!mHiddenViews.remove(view) && DEBUG) {
+                throw new IllegalStateException(
+                        "removed a hidden view but it is not in hidden views list");
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Bitset implementation that provides methods to offset indices.
+     */
+    static class Bucket {
+
+        final static int BITS_PER_WORD = Long.SIZE;
+
+        final static long LAST_BIT = 1L << (Long.SIZE - 1);
+
+        long mData = 0;
+
+        Bucket next;
+
+        void set(int index) {
+            if (index >= BITS_PER_WORD) {
+                ensureNext();
+                next.set(index - BITS_PER_WORD);
+            } else {
+                mData |= 1L << index;
+            }
+        }
+
+        private void ensureNext() {
+            if (next == null) {
+                next = new Bucket();
+            }
+        }
+
+        void clear(int index) {
+            if (index >= BITS_PER_WORD) {
+                if (next != null) {
+                    next.clear(index - BITS_PER_WORD);
+                }
+            } else {
+                mData &= ~(1L << index);
+            }
+
+        }
+
+        boolean get(int index) {
+            if (index >= BITS_PER_WORD) {
+                ensureNext();
+                return next.get(index - BITS_PER_WORD);
+            } else {
+                return (mData & (1L << index)) != 0;
+            }
+        }
+
+        void reset() {
+            mData = 0;
+            if (next != null) {
+                next.reset();
+            }
+        }
+
+        void insert(int index, boolean value) {
+            if (index >= BITS_PER_WORD) {
+                ensureNext();
+                next.insert(index - BITS_PER_WORD, value);
+            } else {
+                final boolean lastBit = (mData & LAST_BIT) != 0;
+                long mask = (1L << index) - 1;
+                final long before = mData & mask;
+                final long after = ((mData & ~mask)) << 1;
+                mData = before | after;
+                if (value) {
+                    set(index);
+                } else {
+                    clear(index);
+                }
+                if (lastBit || next != null) {
+                    ensureNext();
+                    next.insert(0, lastBit);
+                }
+            }
+        }
+
+        boolean remove(int index) {
+            if (index >= BITS_PER_WORD) {
+                ensureNext();
+                return next.remove(index - BITS_PER_WORD);
+            } else {
+                long mask = (1L << index);
+                final boolean value = (mData & mask) != 0;
+                mData &= ~mask;
+                mask = mask - 1;
+                final long before = mData & mask;
+                // cannot use >> because it adds one.
+                final long after = Long.rotateRight(mData & ~mask, 1);
+                mData = before | after;
+                if (next != null) {
+                    if (next.get(0)) {
+                        set(BITS_PER_WORD - 1);
+                    }
+                    next.remove(0);
+                }
+                return value;
+            }
+        }
+
+        int countOnesBefore(int index) {
+            if (next == null) {
+                if (index >= BITS_PER_WORD) {
+                    return Long.bitCount(mData);
+                }
+                return Long.bitCount(mData & ((1L << index) - 1));
+            }
+            if (index < BITS_PER_WORD) {
+                return Long.bitCount(mData & ((1L << index) - 1));
+            } else {
+                return next.countOnesBefore(index - BITS_PER_WORD) + Long.bitCount(mData);
+            }
+        }
+
+        @Override
+        public String toString() {
+            return next == null ? Long.toBinaryString(mData)
+                    : next.toString() + "xx" + Long.toBinaryString(mData);
+        }
+    }
+
+    static interface Callback {
+
+        int getChildCount();
+
+        void addView(View child, int index);
+
+        int indexOfChild(View view);
+
+        void removeViewAt(int index);
+
+        View getChildAt(int offset);
+
+        void removeAllViews();
+
+        RecyclerView.ViewHolder getChildViewHolder(View view);
+
+        void attachViewToParent(View child, int index, ViewGroup.LayoutParams layoutParams);
+
+        void detachViewFromParent(int offset);
+    }
+}

app/src/main/java/android/support/v7/widget/DefaultItemAnimator.java

@@ -0,0 +1,628 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.support.v7.widget;
+
+import android.support.v4.view.ViewCompat;
+import android.support.v4.view.ViewPropertyAnimatorCompat;
+import android.support.v4.view.ViewPropertyAnimatorListener;
+import android.support.v7.widget.RecyclerView.ViewHolder;
+import android.view.View;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This implementation of {@link RecyclerView.ItemAnimator} provides basic
+ * animations on remove, add, and move events that happen to the items in
+ * a RecyclerView. RecyclerView uses a DefaultItemAnimator by default.
+ *
+ * @see RecyclerView#setItemAnimator(RecyclerView.ItemAnimator)
+ */
+public class DefaultItemAnimator extends RecyclerView.ItemAnimator {
+    private static final boolean DEBUG = false;
+
+    private ArrayList<ViewHolder> mPendingRemovals = new ArrayList<ViewHolder>();
+    private ArrayList<ViewHolder> mPendingAdditions = new ArrayList<ViewHolder>();
+    private ArrayList<MoveInfo> mPendingMoves = new ArrayList<MoveInfo>();
+    private ArrayList<ChangeInfo> mPendingChanges = new ArrayList<ChangeInfo>();
+
+    private ArrayList<ArrayList<ViewHolder>> mAdditionsList =
+            new ArrayList<ArrayList<ViewHolder>>();
+    private ArrayList<ArrayList<MoveInfo>> mMovesList = new ArrayList<ArrayList<MoveInfo>>();
+    private ArrayList<ArrayList<ChangeInfo>> mChangesList = new ArrayList<ArrayList<ChangeInfo>>();
+
+    private ArrayList<ViewHolder> mAddAnimations = new ArrayList<ViewHolder>();
+    private ArrayList<ViewHolder> mMoveAnimations = new ArrayList<ViewHolder>();
+    private ArrayList<ViewHolder> mRemoveAnimations = new ArrayList<ViewHolder>();
+    private ArrayList<ViewHolder> mChangeAnimations = new ArrayList<ViewHolder>();
+
+    private static class MoveInfo {
+        public ViewHolder holder;
+        public int fromX, fromY, toX, toY;
+
+        private MoveInfo(ViewHolder holder, int fromX, int fromY, int toX, int toY) {
+            this.holder = holder;
+            this.fromX = fromX;
+            this.fromY = fromY;
+            this.toX = toX;
+            this.toY = toY;
+        }
+    }
+
+    private static class ChangeInfo {
+        public ViewHolder oldHolder, newHolder;
+        public int fromX, fromY, toX, toY;
+        private ChangeInfo(ViewHolder oldHolder, ViewHolder newHolder) {
+            this.oldHolder = oldHolder;
+            this.newHolder = newHolder;
+        }
+
+        private ChangeInfo(ViewHolder oldHolder, ViewHolder newHolder,
+                int fromX, int fromY, int toX, int toY) {
+            this(oldHolder, newHolder);
+            this.fromX = fromX;
+            this.fromY = fromY;
+            this.toX = toX;
+            this.toY = toY;
+        }
+
+        @Override
+        public String toString() {
+            return "ChangeInfo{" +
+                    "oldHolder=" + oldHolder +
+                    ", newHolder=" + newHolder +
+                    ", fromX=" + fromX +
+                    ", fromY=" + fromY +
+                    ", toX=" + toX +
+                    ", toY=" + toY +
+                    '}';
+        }
+    }
+
+    @Override
+    public void runPendingAnimations() {
+        boolean removalsPending = !mPendingRemovals.isEmpty();
+        boolean movesPending = !mPendingMoves.isEmpty();
+        boolean changesPending = !mPendingChanges.isEmpty();
+        boolean additionsPending = !mPendingAdditions.isEmpty();
+        if (!removalsPending && !movesPending && !additionsPending && !changesPending) {
+            // nothing to animate
+            return;
+        }
+        // First, remove stuff
+        for (ViewHolder holder : mPendingRemovals) {
+            animateRemoveImpl(holder);
+        }
+        mPendingRemovals.clear();
+        // Next, move stuff
+        if (movesPending) {
+            final ArrayList<MoveInfo> moves = new ArrayList<MoveInfo>();
+            moves.addAll(mPendingMoves);
+            mMovesList.add(moves);
+            mPendingMoves.clear();
+            Runnable mover = new Runnable() {
+                @Override
+                public void run() {
+                    for (MoveInfo moveInfo : moves) {
+                        animateMoveImpl(moveInfo.holder, moveInfo.fromX, moveInfo.fromY,
+                                moveInfo.toX, moveInfo.toY);
+                    }
+                    moves.clear();
+                    mMovesList.remove(moves);
+                }
+            };
+            if (removalsPending) {
+                View view = moves.get(0).holder.itemView;
+                ViewCompat.postOnAnimationDelayed(view, mover, getRemoveDuration());
+            } else {
+                mover.run();
+            }
+        }
+        // Next, change stuff, to run in parallel with move animations
+        if (changesPending) {
+            final ArrayList<ChangeInfo> changes = new ArrayList<ChangeInfo>();
+            changes.addAll(mPendingChanges);
+            mChangesList.add(changes);
+            mPendingChanges.clear();
+            Runnable changer = new Runnable() {
+                @Override
+                public void run() {
+                    for (ChangeInfo change : changes) {
+                        animateChangeImpl(change);
+                    }
+                    changes.clear();
+                    mChangesList.remove(changes);
+                }
+            };
+            if (removalsPending) {
+                ViewHolder holder = changes.get(0).oldHolder;
+                ViewCompat.postOnAnimationDelayed(holder.itemView, changer, getRemoveDuration());
+            } else {
+                changer.run();
+            }
+        }
+        // Next, add stuff
+        if (additionsPending) {
+            final ArrayList<ViewHolder> additions = new ArrayList<ViewHolder>();
+            additions.addAll(mPendingAdditions);
+            mAdditionsList.add(additions);
+            mPendingAdditions.clear();
+            Runnable adder = new Runnable() {
+                public void run() {
+                    for (ViewHolder holder : additions) {
+                        animateAddImpl(holder);
+                    }
+                    additions.clear();
+                    mAdditionsList.remove(additions);
+                }
+            };
+            if (removalsPending || movesPending || changesPending) {
+                long removeDuration = removalsPending ? getRemoveDuration() : 0;
+                long moveDuration = movesPending ? getMoveDuration() : 0;
+                long changeDuration = changesPending ? getChangeDuration() : 0;
+                long totalDelay = removeDuration + Math.max(moveDuration, changeDuration);
+                View view = additions.get(0).itemView;
+                ViewCompat.postOnAnimationDelayed(view, adder, totalDelay);
+            } else {
+                adder.run();
+            }
+        }
+    }
+
+    @Override
+    public boolean animateRemove(final ViewHolder holder) {
+        endAnimation(holder);
+        mPendingRemovals.add(holder);
+        return true;
+    }
+
+    private void animateRemoveImpl(final ViewHolder holder) {
+        final View view = holder.itemView;
+        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
+        animation.setDuration(getRemoveDuration())
+                .alpha(0).setListener(new VpaListenerAdapter() {
+            @Override
+            public void onAnimationStart(View view) {
+                dispatchRemoveStarting(holder);
+            }
+            @Override
+            public void onAnimationEnd(View view) {
+                animation.setListener(null);
+                ViewCompat.setAlpha(view, 1);
+                dispatchRemoveFinished(holder);
+                mRemoveAnimations.remove(holder);
+                dispatchFinishedWhenDone();
+            }
+        }).start();
+        mRemoveAnimations.add(holder);
+    }
+
+    @Override
+    public boolean animateAdd(final ViewHolder holder) {
+        endAnimation(holder);
+        ViewCompat.setAlpha(holder.itemView, 0);
+        mPendingAdditions.add(holder);
+        return true;
+    }
+
+    private void animateAddImpl(final ViewHolder holder) {
+        final View view = holder.itemView;
+        mAddAnimations.add(holder);
+        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
+        animation.alpha(1).setDuration(getAddDuration()).
+                setListener(new VpaListenerAdapter() {
+                    @Override
+                    public void onAnimationStart(View view) {
+                        dispatchAddStarting(holder);
+                    }
+                    @Override
+                    public void onAnimationCancel(View view) {
+                        ViewCompat.setAlpha(view, 1);
+                    }
+
+                    @Override
+                    public void onAnimationEnd(View view) {
+                        animation.setListener(null);
+                        dispatchAddFinished(holder);
+                        mAddAnimations.remove(holder);
+                        dispatchFinishedWhenDone();
+                    }
+                }).start();
+    }
+
+    @Override
+    public boolean animateMove(final ViewHolder holder, int fromX, int fromY,
+            int toX, int toY) {
+        final View view = holder.itemView;
+        fromX += ViewCompat.getTranslationX(holder.itemView);
+        fromY += ViewCompat.getTranslationY(holder.itemView);
+        endAnimation(holder);
+        int deltaX = toX - fromX;
+        int deltaY = toY - fromY;
+        if (deltaX == 0 && deltaY == 0) {
+            dispatchMoveFinished(holder);
+            return false;
+        }
+        if (deltaX != 0) {
+            ViewCompat.setTranslationX(view, -deltaX);
+        }
+        if (deltaY != 0) {
+            ViewCompat.setTranslationY(view, -deltaY);
+        }
+        mPendingMoves.add(new MoveInfo(holder, fromX, fromY, toX, toY));
+        return true;
+    }
+
+    private void animateMoveImpl(final ViewHolder holder, int fromX, int fromY, int toX, int toY) {
+        final View view = holder.itemView;
+        final int deltaX = toX - fromX;
+        final int deltaY = toY - fromY;
+        if (deltaX != 0) {
+            ViewCompat.animate(view).translationX(0);
+        }
+        if (deltaY != 0) {
+            ViewCompat.animate(view).translationY(0);
+        }
+        // TODO: make EndActions end listeners instead, since end actions aren't called when
+        // vpas are canceled (and can't end them. why?)
+        // need listener functionality in VPACompat for this. Ick.
+        mMoveAnimations.add(holder);
+        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
+        animation.setDuration(getMoveDuration()).setListener(new VpaListenerAdapter() {
+            @Override
+            public void onAnimationStart(View view) {
+                dispatchMoveStarting(holder);
+            }
+            @Override
+            public void onAnimationCancel(View view) {
+                if (deltaX != 0) {
+                    ViewCompat.setTranslationX(view, 0);
+                }
+                if (deltaY != 0) {
+                    ViewCompat.setTranslationY(view, 0);
+                }
+            }
+            @Override
+            public void onAnimationEnd(View view) {
+                animation.setListener(null);
+                dispatchMoveFinished(holder);
+                mMoveAnimations.remove(holder);
+                dispatchFinishedWhenDone();
+            }
+        }).start();
+    }
+
+    @Override
+    public boolean animateChange(ViewHolder oldHolder, ViewHolder newHolder,
+            int fromX, int fromY, int toX, int toY) {
+        final float prevTranslationX = ViewCompat.getTranslationX(oldHolder.itemView);
+        final float prevTranslationY = ViewCompat.getTranslationY(oldHolder.itemView);
+        final float prevAlpha = ViewCompat.getAlpha(oldHolder.itemView);
+        endAnimation(oldHolder);
+        int deltaX = (int) (toX - fromX - prevTranslationX);
+        int deltaY = (int) (toY - fromY - prevTranslationY);
+        // recover prev translation state after ending animation
+        ViewCompat.setTranslationX(oldHolder.itemView, prevTranslationX);
+        ViewCompat.setTranslationY(oldHolder.itemView, prevTranslationY);
+        ViewCompat.setAlpha(oldHolder.itemView, prevAlpha);
+        if (newHolder != null && newHolder.itemView != null) {
+            // carry over translation values
+            endAnimation(newHolder);
+            ViewCompat.setTranslationX(newHolder.itemView, -deltaX);
+            ViewCompat.setTranslationY(newHolder.itemView, -deltaY);
+            ViewCompat.setAlpha(newHolder.itemView, 0);
+        }
+        mPendingChanges.add(new ChangeInfo(oldHolder, newHolder, fromX, fromY, toX, toY));
+        return true;
+    }
+
+    private void animateChangeImpl(final ChangeInfo changeInfo) {
+        final ViewHolder holder = changeInfo.oldHolder;
+        final View view = holder.itemView;
+        final ViewHolder newHolder = changeInfo.newHolder;
+        final View newView = newHolder != null ? newHolder.itemView : null;
+        mChangeAnimations.add(changeInfo.oldHolder);
+
+        final ViewPropertyAnimatorCompat oldViewAnim = ViewCompat.animate(view).setDuration(
+                getChangeDuration());
+        oldViewAnim.translationX(changeInfo.toX - changeInfo.fromX);
+        oldViewAnim.translationY(changeInfo.toY - changeInfo.fromY);
+        oldViewAnim.alpha(0).setListener(new VpaListenerAdapter() {
+            @Override
+            public void onAnimationStart(View view) {
+                dispatchChangeStarting(changeInfo.oldHolder, true);
+            }
+            @Override
+            public void onAnimationEnd(View view) {
+                oldViewAnim.setListener(null);
+                ViewCompat.setAlpha(view, 1);
+                ViewCompat.setTranslationX(view, 0);
+                ViewCompat.setTranslationY(view, 0);
+                dispatchChangeFinished(changeInfo.oldHolder, true);
+                mChangeAnimations.remove(changeInfo.oldHolder);
+                dispatchFinishedWhenDone();
+            }
+        }).start();
+        if (newView != null) {
+            mChangeAnimations.add(changeInfo.newHolder);
+            final ViewPropertyAnimatorCompat newViewAnimation = ViewCompat.animate(newView);
+            newViewAnimation.translationX(0).translationY(0).setDuration(getChangeDuration()).
+                    alpha(1).setListener(new VpaListenerAdapter() {
+                @Override
+                public void onAnimationStart(View view) {
+                    dispatchChangeStarting(changeInfo.newHolder, false);
+                }
+                @Override
+                public void onAnimationEnd(View view) {
+                    newViewAnimation.setListener(null);
+                    ViewCompat.setAlpha(newView, 1);
+                    ViewCompat.setTranslationX(newView, 0);
+                    ViewCompat.setTranslationY(newView, 0);
+                    dispatchChangeFinished(changeInfo.newHolder, false);
+                    mChangeAnimations.remove(changeInfo.newHolder);
+                    dispatchFinishedWhenDone();
+                }
+            }).start();
+        }
+    }
+
+    private void endChangeAnimation(List<ChangeInfo> infoList, ViewHolder item) {
+        for (int i = infoList.size() - 1; i >= 0; i--) {
+            ChangeInfo changeInfo = infoList.get(i);
+            if (endChangeAnimationIfNecessary(changeInfo, item)) {
+                if (changeInfo.oldHolder == null && changeInfo.newHolder == null) {
+                    infoList.remove(changeInfo);
+                }
+            }
+        }
+    }
+
+    private void endChangeAnimationIfNecessary(ChangeInfo changeInfo) {
+        if (changeInfo.oldHolder != null) {
+            endChangeAnimationIfNecessary(changeInfo, changeInfo.oldHolder);
+        }
+        if (changeInfo.newHolder != null) {
+            endChangeAnimationIfNecessary(changeInfo, changeInfo.newHolder);
+        }
+    }
+    private boolean endChangeAnimationIfNecessary(ChangeInfo changeInfo, ViewHolder item) {
+        boolean oldItem = false;
+        if (changeInfo.newHolder == item) {
+            changeInfo.newHolder = null;
+        } else if (changeInfo.oldHolder == item) {
+            changeInfo.oldHolder = null;
+            oldItem = true;
+        } else {
+            return false;
+        }
+        ViewCompat.setAlpha(item.itemView, 1);
+        ViewCompat.setTranslationX(item.itemView, 0);
+        ViewCompat.setTranslationY(item.itemView, 0);
+        dispatchChangeFinished(item, oldItem);
+        return true;
+    }
+
+    @Override
+    public void endAnimation(ViewHolder item) {
+        final View view = item.itemView;
+        // this will trigger end callback which should set properties to their target values.
+        ViewCompat.animate(view).cancel();
+        // TODO if some other animations are chained to end, how do we cancel them as well?
+        for (int i = mPendingMoves.size() - 1; i >= 0; i--) {
+            MoveInfo moveInfo = mPendingMoves.get(i);
+            if (moveInfo.holder == item) {
+                ViewCompat.setTranslationY(view, 0);
+                ViewCompat.setTranslationX(view, 0);
+                dispatchMoveFinished(item);
+                mPendingMoves.remove(item);
+            }
+        }
+        endChangeAnimation(mPendingChanges, item);
+        if (mPendingRemovals.remove(item)) {
+            ViewCompat.setAlpha(view, 1);
+            dispatchRemoveFinished(item);
+        }
+        if (mPendingAdditions.remove(item)) {
+            ViewCompat.setAlpha(view, 1);
+            dispatchAddFinished(item);
+        }
+
+        for (int i = mChangesList.size() - 1; i >= 0; i--) {
+            ArrayList<ChangeInfo> changes = mChangesList.get(i);
+            endChangeAnimation(changes, item);
+            if (changes.isEmpty()) {
+                mChangesList.remove(changes);
+            }
+        }
+        for (int i = mMovesList.size() - 1; i >= 0; i--) {
+            ArrayList<MoveInfo> moves = mMovesList.get(i);
+            for (int j = moves.size() - 1; j >= 0; j--) {
+                MoveInfo moveInfo = moves.get(j);
+                if (moveInfo.holder == item) {
+                    ViewCompat.setTranslationY(view, 0);
+                    ViewCompat.setTranslationX(view, 0);
+                    dispatchMoveFinished(item);
+                    moves.remove(j);
+                    if (moves.isEmpty()) {
+                        mMovesList.remove(moves);
+                    }
+                    break;
+                }
+            }
+        }
+        for (int i = mAdditionsList.size() - 1; i >= 0; i--) {
+            ArrayList<ViewHolder> additions = mAdditionsList.get(i);
+            if (additions.remove(item)) {
+                ViewCompat.setAlpha(view, 1);
+                dispatchAddFinished(item);
+                if (additions.isEmpty()) {
+                    mAdditionsList.remove(additions);
+                }
+            }
+        }
+
+        // animations should be ended by the cancel above.
+        if (mRemoveAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mRemoveAnimations list");
+        }
+
+        if (mAddAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mAddAnimations list");
+        }
+
+        if (mChangeAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mChangeAnimations list");
+        }
+
+        if (mMoveAnimations.remove(item) && DEBUG) {
+            throw new IllegalStateException("after animation is cancelled, item should not be in "
+                    + "mMoveAnimations list");
+        }
+        dispatchFinishedWhenDone();
+    }
+
+    @Override
+    public boolean isRunning() {
+        return (!mPendingAdditions.isEmpty() ||
+                !mPendingChanges.isEmpty() ||
+                !mPendingMoves.isEmpty() ||
+                !mPendingRemovals.isEmpty() ||
+                !mMoveAnimations.isEmpty() ||
+                !mRemoveAnimations.isEmpty() ||
+                !mAddAnimations.isEmpty() ||
+                !mChangeAnimations.isEmpty() ||
+                !mMovesList.isEmpty() ||
+                !mAdditionsList.isEmpty() ||
+                !mChangesList.isEmpty());
+    }
+
+    /**
+     * Check the state of currently pending and running animations. If there are none
+     * pending/running, call {@link #dispatchAnimationsFinished()} to notify any
+     * listeners.
+     */
+    private void dispatchFinishedWhenDone() {
+        if (!isRunning()) {
+            dispatchAnimationsFinished();
+        }
+    }
+
+    @Override
+    public void endAnimations() {
+        int count = mPendingMoves.size();
+        for (int i = count - 1; i >= 0; i--) {
+            MoveInfo item = mPendingMoves.get(i);
+            View view = item.holder.itemView;
+            ViewCompat.setTranslationY(view, 0);
+            ViewCompat.setTranslationX(view, 0);
+            dispatchMoveFinished(item.holder);
+            mPendingMoves.remove(i);
+        }
+        count = mPendingRemovals.size();
+        for (int i = count - 1; i >= 0; i--) {
+            ViewHolder item = mPendingRemovals.get(i);
+            dispatchRemoveFinished(item);
+            mPendingRemovals.remove(i);
+        }
+        count = mPendingAdditions.size();
+        for (int i = count - 1; i >= 0; i--) {
+            ViewHolder item = mPendingAdditions.get(i);
+            View view = item.itemView;
+            ViewCompat.setAlpha(view, 1);
+            dispatchAddFinished(item);
+            mPendingAdditions.remove(i);
+        }
+        count = mPendingChanges.size();
+        for (int i = count - 1; i >= 0; i--) {
+            endChangeAnimationIfNecessary(mPendingChanges.get(i));
+        }
+        mPendingChanges.clear();
+        if (!isRunning()) {
+            return;
+        }
+
+        int listCount = mMovesList.size();
+        for (int i = listCount - 1; i >= 0; i--) {
+            ArrayList<MoveInfo> moves = mMovesList.get(i);
+            count = moves.size();
+            for (int j = count - 1; j >= 0; j--) {
+                MoveInfo moveInfo = moves.get(j);
+                ViewHolder item = moveInfo.holder;
+                View view = item.itemView;
+                ViewCompat.setTranslationY(view, 0);
+                ViewCompat.setTranslationX(view, 0);
+                dispatchMoveFinished(moveInfo.holder);
+                moves.remove(j);
+                if (moves.isEmpty()) {
+                    mMovesList.remove(moves);
+                }
+            }
+        }
+        listCount = mAdditionsList.size();
+        for (int i = listCount - 1; i >= 0; i--) {
+            ArrayList<ViewHolder> additions = mAdditionsList.get(i);
+            count = additions.size();
+            for (int j = count - 1; j >= 0; j--) {
+                ViewHolder item = additions.get(j);
+                View view = item.itemView;
+                ViewCompat.setAlpha(view, 1);
+                dispatchAddFinished(item);
+                additions.remove(j);
+                if (additions.isEmpty()) {
+                    mAdditionsList.remove(additions);
+                }
+            }
+        }
+        listCount = mChangesList.size();
+        for (int i = listCount - 1; i >= 0; i--) {
+            ArrayList<ChangeInfo> changes = mChangesList.get(i);
+            count = changes.size();
+            for (int j = count - 1; j >= 0; j--) {
+                endChangeAnimationIfNecessary(changes.get(j));
+                if (changes.isEmpty()) {
+                    mChangesList.remove(changes);
+                }
+            }
+        }
+
+        cancelAll(mRemoveAnimations);
+        cancelAll(mMoveAnimations);
+        cancelAll(mAddAnimations);
+        cancelAll(mChangeAnimations);
+
+        dispatchAnimationsFinished();
+    }
+
+    void cancelAll(List<ViewHolder> viewHolders) {
+        for (int i = viewHolders.size() - 1; i >= 0; i--) {
+            ViewCompat.animate(viewHolders.get(i).itemView).cancel();
+        }
+    }
+
+    private static class VpaListenerAdapter implements ViewPropertyAnimatorListener {
+        @Override
+        public void onAnimationStart(View view) {}
+
+        @Override
+        public void onAnimationEnd(View view) {}
+
+        @Override
+        public void onAnimationCancel(View view) {}
+    };
+}

app/src/main/java/android/support/v7/widget/GridLayoutManager.java

@@ -0,0 +1,816 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific languag`e governing permissions and
+ * limitations under the License.
+ */
+package android.support.v7.widget;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.util.SparseIntArray;
+import android.view.View;
+import android.view.ViewGroup;
+
+import java.util.Arrays;
+
+/**
+ * A {@link RecyclerView.LayoutManager} implementations that lays out items in a grid.
+ * <p>
+ * By default, each item occupies 1 span. You can change it by providing a custom
+ * {@link SpanSizeLookup} instance via {@link #setSpanSizeLookup(SpanSizeLookup)}.
+ */
+public class GridLayoutManager extends LinearLayoutManager {
+
+    private static final boolean DEBUG = false;
+    private static final String TAG = "GridLayoutManager";
+    public static final int DEFAULT_SPAN_COUNT = -1;
+    /**
+     * The measure spec for the scroll direction.
+     */
+    static final int MAIN_DIR_SPEC =
+            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
+
+    int mSpanCount = DEFAULT_SPAN_COUNT;
+    /**
+     * The size of each span
+     */
+    int mSizePerSpan;
+    /**
+     * Temporary array to keep views in layoutChunk method
+     */
+    View[] mSet;
+    final SparseIntArray mPreLayoutSpanSizeCache = new SparseIntArray();
+    final SparseIntArray mPreLayoutSpanIndexCache = new SparseIntArray();
+    SpanSizeLookup mSpanSizeLookup = new DefaultSpanSizeLookup();
+    // re-used variable to acquire decor insets from RecyclerView
+    final Rect mDecorInsets = new Rect();
+
+    /**
+     * Creates a vertical GridLayoutManager
+     *
+     * @param context Current context, will be used to access resources.
+     * @param spanCount The number of columns in the grid
+     */
+    public GridLayoutManager(Context context, int spanCount) {
+        super(context);
+        setSpanCount(spanCount);
+    }
+
+    /**
+     * @param context Current context, will be used to access resources.
+     * @param spanCount The number of columns or rows in the grid
+     * @param orientation Layout orientation. Should be {@link #HORIZONTAL} or {@link
+     *                      #VERTICAL}.
+     * @param reverseLayout When set to true, layouts from end to start.
+     */
+    public GridLayoutManager(Context context, int spanCount, int orientation,
+            boolean reverseLayout) {
+        super(context, orientation, reverseLayout);
+        setSpanCount(spanCount);
+    }
+
+    /**
+     * stackFromEnd is not supported by GridLayoutManager. Consider using
+     * {@link #setReverseLayout(boolean)}.
+     */
+    @Override
+    public void setStackFromEnd(boolean stackFromEnd) {
+        if (stackFromEnd) {
+            throw new UnsupportedOperationException(
+                    "GridLayoutManager does not support stack from end."
+                            + " Consider using reverse layout");
+        }
+        super.setStackFromEnd(false);
+    }
+
+    @Override
+    public int getRowCountForAccessibility(RecyclerView.Recycler recycler,
+            RecyclerView.State state) {
+        if (mOrientation == HORIZONTAL) {
+            return mSpanCount;
+        }
+        if (state.getItemCount() < 1) {
+            return 0;
+        }
+        return getSpanGroupIndex(recycler, state, state.getItemCount() - 1);
+    }
+
+    @Override
+    public int getColumnCountForAccessibility(RecyclerView.Recycler recycler,
+            RecyclerView.State state) {
+        if (mOrientation == VERTICAL) {
+            return mSpanCount;
+        }
+        if (state.getItemCount() < 1) {
+            return 0;
+        }
+        return getSpanGroupIndex(recycler, state, state.getItemCount() - 1);
+    }
+
+    @Override
+    public void onInitializeAccessibilityNodeInfoForItem(RecyclerView.Recycler recycler,
+            RecyclerView.State state, View host, AccessibilityNodeInfoCompat info) {
+        ViewGroup.LayoutParams lp = host.getLayoutParams();
+        if (!(lp instanceof LayoutParams)) {
+            super.onInitializeAccessibilityNodeInfoForItem(host, info);
+            return;
+        }
+        LayoutParams glp = (LayoutParams) lp;
+        int spanGroupIndex = getSpanGroupIndex(recycler, state, glp.getViewPosition());
+        if (mOrientation == HORIZONTAL) {
+            info.setCollectionItemInfo(AccessibilityNodeInfoCompat.CollectionItemInfoCompat.obtain(
+                    glp.getSpanIndex(), glp.getSpanSize(),
+                    spanGroupIndex, 1,
+                    mSpanCount > 1 && glp.getSpanSize() == mSpanCount, false));
+        } else { // VERTICAL
+            info.setCollectionItemInfo(AccessibilityNodeInfoCompat.CollectionItemInfoCompat.obtain(
+                    spanGroupIndex , 1,
+                    glp.getSpanIndex(), glp.getSpanSize(),
+                    mSpanCount > 1 && glp.getSpanSize() == mSpanCount, false));
+        }
+    }
+
+    @Override
+    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
+        if (state.isPreLayout()) {
+            cachePreLayoutSpanMapping();
+        }
+        super.onLayoutChildren(recycler, state);
+        if (DEBUG) {
+            validateChildOrder();
+        }
+        clearPreLayoutSpanMappingCache();
+    }
+
+    private void clearPreLayoutSpanMappingCache() {
+        mPreLayoutSpanSizeCache.clear();
+        mPreLayoutSpanIndexCache.clear();
+    }
+
+    private void cachePreLayoutSpanMapping() {
+        final int childCount = getChildCount();
+        for (int i = 0; i < childCount; i++) {
+            final LayoutParams lp = (LayoutParams) getChildAt(i).getLayoutParams();
+            final int viewPosition = lp.getViewPosition();
+            mPreLayoutSpanSizeCache.put(viewPosition, lp.getSpanSize());
+            mPreLayoutSpanIndexCache.put(viewPosition, lp.getSpanIndex());
+        }
+    }
+
+    @Override
+    public void onItemsAdded(RecyclerView recyclerView, int positionStart, int itemCount) {
+        mSpanSizeLookup.invalidateSpanIndexCache();
+    }
+
+    @Override
+    public void onItemsChanged(RecyclerView recyclerView) {
+        mSpanSizeLookup.invalidateSpanIndexCache();
+    }
+
+    @Override
+    public void onItemsRemoved(RecyclerView recyclerView, int positionStart, int itemCount) {
+        mSpanSizeLookup.invalidateSpanIndexCache();
+    }
+
+    @Override
+    public void onItemsUpdated(RecyclerView recyclerView, int positionStart, int itemCount) {
+        mSpanSizeLookup.invalidateSpanIndexCache();
+    }
+
+    @Override
+    public void onItemsMoved(RecyclerView recyclerView, int from, int to, int itemCount) {
+        mSpanSizeLookup.invalidateSpanIndexCache();
+    }
+
+    @Override
+    public RecyclerView.LayoutParams generateDefaultLayoutParams() {
+        return new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
+                ViewGroup.LayoutParams.WRAP_CONTENT);
+    }
+
+    @Override
+    public RecyclerView.LayoutParams generateLayoutParams(Context c, AttributeSet attrs) {
+        return new LayoutParams(c, attrs);
+    }
+
+    @Override
+    public RecyclerView.LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) {
+        if (lp instanceof ViewGroup.MarginLayoutParams) {
+            return new LayoutParams((ViewGroup.MarginLayoutParams) lp);
+        } else {
+            return new LayoutParams(lp);
+        }
+    }
+
+    @Override
+    public boolean checkLayoutParams(RecyclerView.LayoutParams lp) {
+        return lp instanceof LayoutParams;
+    }
+
+    /**
+     * Sets the source to get the number of spans occupied by each item in the adapter.
+     *
+     * @param spanSizeLookup {@link SpanSizeLookup} instance to be used to query number of spans
+     *                       occupied by each item
+     */
+    public void setSpanSizeLookup(SpanSizeLookup spanSizeLookup) {
+        mSpanSizeLookup = spanSizeLookup;
+    }
+
+    /**
+     * Returns the current {@link SpanSizeLookup} used by the GridLayoutManager.
+     *
+     * @return The current {@link SpanSizeLookup} used by the GridLayoutManager.
+     */
+    public SpanSizeLookup getSpanSizeLookup() {
+        return mSpanSizeLookup;
+    }
+
+    private void updateMeasurements() {
+        int totalSpace;
+        if (getOrientation() == VERTICAL) {
+            totalSpace = getWidth() - getPaddingRight() - getPaddingLeft();
+        } else {
+            totalSpace = getHeight() - getPaddingBottom() - getPaddingTop();
+        }
+        mSizePerSpan = totalSpace / mSpanCount;
+    }
+
+    @Override
+    void onAnchorReady(RecyclerView.State state, AnchorInfo anchorInfo) {
+        super.onAnchorReady(state, anchorInfo);
+        updateMeasurements();
+        if (state.getItemCount() > 0 && !state.isPreLayout()) {
+            ensureAnchorIsInFirstSpan(anchorInfo);
+        }
+        if (mSet == null || mSet.length != mSpanCount) {
+            mSet = new View[mSpanCount];
+        }
+    }
+
+    private void ensureAnchorIsInFirstSpan(AnchorInfo anchorInfo) {
+        int span = mSpanSizeLookup.getCachedSpanIndex(anchorInfo.mPosition, mSpanCount);
+        while (span > 0 && anchorInfo.mPosition > 0) {
+            anchorInfo.mPosition--;
+            span = mSpanSizeLookup.getCachedSpanIndex(anchorInfo.mPosition, mSpanCount);
+        }
+    }
+
+    private int getSpanGroupIndex(RecyclerView.Recycler recycler, RecyclerView.State state,
+            int viewPosition) {
+        if (!state.isPreLayout()) {
+            return mSpanSizeLookup.getSpanGroupIndex(viewPosition, mSpanCount);
+        }
+        final int adapterPosition = recycler.convertPreLayoutPositionToPostLayout(viewPosition);
+        if (adapterPosition == -1) {
+            if (DEBUG) {
+                throw new RuntimeException("Cannot find span group index for position "
+                        + viewPosition);
+            }
+            Log.w(TAG, "Cannot find span size for pre layout position. " + viewPosition);
+            return 0;
+        }
+        return mSpanSizeLookup.getSpanGroupIndex(adapterPosition, mSpanCount);
+    }
+
+    private int getSpanIndex(RecyclerView.Recycler recycler, RecyclerView.State state, int pos) {
+        if (!state.isPreLayout()) {
+            return mSpanSizeLookup.getCachedSpanIndex(pos, mSpanCount);
+        }
+        final int cached = mPreLayoutSpanIndexCache.get(pos, -1);
+        if (cached != -1) {
+            return cached;
+        }
+        final int adapterPosition = recycler.convertPreLayoutPositionToPostLayout(pos);
+        if (adapterPosition == -1) {
+            if (DEBUG) {
+                throw new RuntimeException("Cannot find span index for pre layout position. It is"
+                        + " not cached, not in the adapter. Pos:" + pos);
+            }
+            Log.w(TAG, "Cannot find span size for pre layout position. It is"
+                    + " not cached, not in the adapter. Pos:" + pos);
+            return 0;
+        }
+        return mSpanSizeLookup.getCachedSpanIndex(adapterPosition, mSpanCount);
+    }
+
+    private int getSpanSize(RecyclerView.Recycler recycler, RecyclerView.State state, int pos) {
+        if (!state.isPreLayout()) {
+            return mSpanSizeLookup.getSpanSize(pos);
+        }
+        final int cached = mPreLayoutSpanSizeCache.get(pos, -1);
+        if (cached != -1) {
+            return cached;
+        }
+        final int adapterPosition = recycler.convertPreLayoutPositionToPostLayout(pos);
+        if (adapterPosition == -1) {
+            if (DEBUG) {
+                throw new RuntimeException("Cannot find span size for pre layout position. It is"
+                        + " not cached, not in the adapter. Pos:" + pos);
+            }
+            Log.w(TAG, "Cannot find span size for pre layout position. It is"
+                    + " not cached, not in the adapter. Pos:" + pos);
+            return 1;
+        }
+        return mSpanSizeLookup.getSpanSize(adapterPosition);
+    }
+
+    @Override
+    void layoutChunk(RecyclerView.Recycler recycler, RecyclerView.State state,
+            LayoutState layoutState, LayoutChunkResult result) {
+        final boolean layingOutInPrimaryDirection =
+                layoutState.mItemDirection == LayoutState.ITEM_DIRECTION_TAIL;
+        int count = 0;
+        int consumedSpanCount = 0;
+        int remainingSpan = mSpanCount;
+        if (!layingOutInPrimaryDirection) {
+            int itemSpanIndex = getSpanIndex(recycler, state, layoutState.mCurrentPosition);
+            int itemSpanSize = getSpanSize(recycler, state, layoutState.mCurrentPosition);
+            remainingSpan = itemSpanIndex + itemSpanSize;
+        }
+        while (count < mSpanCount && layoutState.hasMore(state) && remainingSpan > 0) {
+            int pos = layoutState.mCurrentPosition;
+            final int spanSize = getSpanSize(recycler, state, pos);
+            if (spanSize > mSpanCount) {
+                throw new IllegalArgumentException("Item at position " + pos + " requires " +
+                        spanSize + " spans but GridLayoutManager has only " + mSpanCount
+                        + " spans.");
+            }
+            remainingSpan -= spanSize;
+            if (remainingSpan < 0) {
+                break; // item did not fit into this row or column
+            }
+            View view = layoutState.next(recycler);
+            if (view == null) {
+                break;
+            }
+            consumedSpanCount += spanSize;
+            mSet[count] = view;
+            count++;
+        }
+
+        if (count == 0) {
+            result.mFinished = true;
+            return;
+        }
+
+        int maxSize = 0;
+
+        // we should assign spans before item decor offsets are calculated
+        assignSpans(recycler, state, count, consumedSpanCount, layingOutInPrimaryDirection);
+        for (int i = 0; i < count; i++) {
+            View view = mSet[i];
+            if (layoutState.mScrapList == null) {
+                if (layingOutInPrimaryDirection) {
+                    addView(view);
+                } else {
+                    addView(view, 0);
+                }
+            } else {
+                if (layingOutInPrimaryDirection) {
+                    addDisappearingView(view);
+                } else {
+                    addDisappearingView(view, 0);
+                }
+            }
+
+            int spanSize = getSpanSize(recycler, state, getPosition(view));
+            final int spec = View.MeasureSpec.makeMeasureSpec(mSizePerSpan * spanSize,
+                    View.MeasureSpec.EXACTLY);
+            final LayoutParams lp = (LayoutParams) view.getLayoutParams();
+            if (mOrientation == VERTICAL) {
+                measureChildWithDecorationsAndMargin(view, spec, getMainDirSpec(lp.height));
+            } else {
+                measureChildWithDecorationsAndMargin(view, getMainDirSpec(lp.width), spec);
+            }
+            final int size = mOrientationHelper.getDecoratedMeasurement(view);
+            if (size > maxSize) {
+                maxSize = size;
+            }
+        }
+
+        // views that did not measure the maxSize has to be re-measured
+        final int maxMeasureSpec = getMainDirSpec(maxSize);
+        for (int i = 0; i < count; i ++) {
+            final View view = mSet[i];
+            if (mOrientationHelper.getDecoratedMeasurement(view) != maxSize) {
+                int spanSize = getSpanSize(recycler, state, getPosition(view));
+                final int spec = View.MeasureSpec.makeMeasureSpec(mSizePerSpan * spanSize,
+                        View.MeasureSpec.EXACTLY);
+                if (mOrientation == VERTICAL) {
+                    measureChildWithDecorationsAndMargin(view, spec, maxMeasureSpec);
+                } else {
+                    measureChildWithDecorationsAndMargin(view, maxMeasureSpec, spec);
+                }
+            }
+        }
+
+        result.mConsumed = maxSize;
+
+        int left = 0, right = 0, top = 0, bottom = 0;
+        if (mOrientation == VERTICAL) {
+            if (layoutState.mLayoutDirection == LayoutState.LAYOUT_START) {
+                bottom = layoutState.mOffset;
+                top = bottom - maxSize;
+            } else {
+                top = layoutState.mOffset;
+                bottom = top + maxSize;
+            }
+        } else {
+            if (layoutState.mLayoutDirection == LayoutState.LAYOUT_START) {
+                right = layoutState.mOffset;
+                left = right - maxSize;
+            } else {
+                left = layoutState.mOffset;
+                right = left + maxSize;
+            }
+        }
+        for (int i = 0; i < count; i++) {
+            View view = mSet[i];
+            LayoutParams params = (LayoutParams) view.getLayoutParams();
+            if (mOrientation == VERTICAL) {
+                left = getPaddingLeft() + mSizePerSpan * params.mSpanIndex;
+                right = left + mOrientationHelper.getDecoratedMeasurementInOther(view);
+            } else {
+                top = getPaddingTop() + mSizePerSpan * params.mSpanIndex;
+                bottom = top + mOrientationHelper.getDecoratedMeasurementInOther(view);
+            }
+            // We calculate everything with View's bounding box (which includes decor and margins)
+            // To calculate correct layout position, we subtract margins.
+            layoutDecorated(view, left + params.leftMargin, top + params.topMargin,
+                    right - params.rightMargin, bottom - params.bottomMargin);
+            if (DEBUG) {
+                Log.d(TAG, "laid out child at position " + getPosition(view) + ", with l:"
+                        + (left + params.leftMargin) + ", t:" + (top + params.topMargin) + ", r:"
+                        + (right - params.rightMargin) + ", b:" + (bottom - params.bottomMargin)
+                        + ", span:" + params.mSpanIndex + ", spanSize:" + params.mSpanSize);
+            }
+            // Consume the available space if the view is not removed OR changed
+            if (params.isItemRemoved() || params.isItemChanged()) {
+                result.mIgnoreConsumed = true;
+            }
+            result.mFocusable |= view.isFocusable();
+        }
+        Arrays.fill(mSet, null);
+    }
+
+    private int getMainDirSpec(int dim) {
+        if (dim < 0) {
+            return MAIN_DIR_SPEC;
+        } else {
+            return View.MeasureSpec.makeMeasureSpec(dim, View.MeasureSpec.EXACTLY);
+        }
+    }
+
+    private void measureChildWithDecorationsAndMargin(View child, int widthSpec, int heightSpec) {
+        calculateItemDecorationsForChild(child, mDecorInsets);
+        RecyclerView.LayoutParams lp = (RecyclerView.LayoutParams) child.getLayoutParams();
+        widthSpec = updateSpecWithExtra(widthSpec, lp.leftMargin + mDecorInsets.left,
+                lp.rightMargin + mDecorInsets.right);
+        heightSpec = updateSpecWithExtra(heightSpec, lp.topMargin + mDecorInsets.top,
+                lp.bottomMargin + mDecorInsets.bottom);
+        child.measure(widthSpec, heightSpec);
+    }
+
+    private int updateSpecWithExtra(int spec, int startInset, int endInset) {
+        if (startInset == 0 && endInset == 0) {
+            return spec;
+        }
+        final int mode = View.MeasureSpec.getMode(spec);
+        if (mode == View.MeasureSpec.AT_MOST || mode == View.MeasureSpec.EXACTLY) {
+            return View.MeasureSpec.makeMeasureSpec(
+                    View.MeasureSpec.getSize(spec) - startInset - endInset, mode);
+        }
+        return spec;
+    }
+
+    private void assignSpans(RecyclerView.Recycler recycler, RecyclerView.State state, int count,
+            int consumedSpanCount, boolean layingOutInPrimaryDirection) {
+        int span, spanDiff, start, end, diff;
+        // make sure we traverse from min position to max position
+        if (layingOutInPrimaryDirection) {
+            start = 0;
+            end = count;
+            diff = 1;
+        } else {
+            start = count - 1;
+            end = -1;
+            diff = -1;
+        }
+        if (mOrientation == VERTICAL && isLayoutRTL()) { // start from last span
+            span = consumedSpanCount - 1;
+            spanDiff = -1;
+        } else {
+            span = 0;
+            spanDiff = 1;
+        }
+        for (int i = start; i != end; i += diff) {
+            View view = mSet[i];
+            LayoutParams params = (LayoutParams) view.getLayoutParams();
+            params.mSpanSize = getSpanSize(recycler, state, getPosition(view));
+            if (spanDiff == -1 && params.mSpanSize > 1) {
+                params.mSpanIndex = span - (params.mSpanSize - 1);
+            } else {
+                params.mSpanIndex = span;
+            }
+            span += spanDiff * params.mSpanSize;
+        }
+    }
+
+    /**
+     * Returns the number of spans laid out by this grid.
+     *
+     * @return The number of spans
+     * @see #setSpanCount(int)
+     */
+    public int getSpanCount() {
+        return mSpanCount;
+    }
+
+    /**
+     * Sets the number of spans to be laid out.
+     * <p>
+     * If {@link #getOrientation()} is {@link #VERTICAL}, this is the number of columns.
+     * If {@link #getOrientation()} is {@link #HORIZONTAL}, this is the number of rows.
+     *
+     * @param spanCount The total number of spans in the grid
+     * @see #getSpanCount()
+     */
+    public void setSpanCount(int spanCount) {
+        if (spanCount == mSpanCount) {
+            return;
+        }
+        if (spanCount < 1) {
+            throw new IllegalArgumentException("Span count should be at least 1. Provided "
+                    + spanCount);
+        }
+        mSpanCount = spanCount;
+        mSpanSizeLookup.invalidateSpanIndexCache();
+    }
+
+    /**
+     * A helper class to provide the number of spans each item occupies.
+     * <p>
+     * Default implementation sets each item to occupy exactly 1 span.
+     *
+     * @see GridLayoutManager#setSpanSizeLookup(SpanSizeLookup)
+     */
+    public static abstract class SpanSizeLookup {
+
+        final SparseIntArray mSpanIndexCache = new SparseIntArray();
+
+        private boolean mCacheSpanIndices = false;
+
+        /**
+         * Returns the number of span occupied by the item at <code>position</code>.
+         *
+         * @param position The adapter position of the item
+         * @return The number of spans occupied by the item at the provided position
+         */
+        abstract public int getSpanSize(int position);
+
+        /**
+         * Sets whether the results of {@link #getSpanIndex(int, int)} method should be cached or
+         * not. By default these values are not cached. If you are not overriding
+         * {@link #getSpanIndex(int, int)}, you should set this to true for better performance.
+         *
+         * @param cacheSpanIndices Whether results of getSpanIndex should be cached or not.
+         */
+        public void setSpanIndexCacheEnabled(boolean cacheSpanIndices) {
+            mCacheSpanIndices = cacheSpanIndices;
+        }
+
+        /**
+         * Clears the span index cache. GridLayoutManager automatically calls this method when
+         * adapter changes occur.
+         */
+        public void invalidateSpanIndexCache() {
+            mSpanIndexCache.clear();
+        }
+
+        /**
+         * Returns whether results of {@link #getSpanIndex(int, int)} method are cached or not.
+         *
+         * @return True if results of {@link #getSpanIndex(int, int)} are cached.
+         */
+        public boolean isSpanIndexCacheEnabled() {
+            return mCacheSpanIndices;
+        }
+
+        int getCachedSpanIndex(int position, int spanCount) {
+            if (!mCacheSpanIndices) {
+                return getSpanIndex(position, spanCount);
+            }
+            final int existing = mSpanIndexCache.get(position, -1);
+            if (existing != -1) {
+                return existing;
+            }
+            final int value = getSpanIndex(position, spanCount);
+            mSpanIndexCache.put(position, value);
+            return value;
+        }
+
+        /**
+         * Returns the final span index of the provided position.
+         * <p>
+         * If you have a faster way to calculate span index for your items, you should override
+         * this method. Otherwise, you should enable span index cache
+         * ({@link #setSpanIndexCacheEnabled(boolean)}) for better performance. When caching is
+         * disabled, default implementation traverses all items from 0 to
+         * <code>position</code>. When caching is enabled, it calculates from the closest cached
+         * value before the <code>position</code>.
+         * <p>
+         * If you override this method, you need to make sure it is consistent with
+         * {@link #getSpanSize(int)}. GridLayoutManager does not call this method for
+         * each item. It is called only for the reference item and rest of the items
+         * are assigned to spans based on the reference item. For example, you cannot assign a
+         * position to span 2 while span 1 is empty.
+         * <p>
+         * Note that span offsets always start with 0 and are not affected by RTL.
+         *
+         * @param position  The position of the item
+         * @param spanCount The total number of spans in the grid
+         * @return The final span position of the item. Should be between 0 (inclusive) and
+         * <code>spanCount</code>(exclusive)
+         */
+        public int getSpanIndex(int position, int spanCount) {
+            int positionSpanSize = getSpanSize(position);
+            if (positionSpanSize == spanCount) {
+                return 0; // quick return for full-span items
+            }
+            int span = 0;
+            int startPos = 0;
+            // If caching is enabled, try to jump
+            if (mCacheSpanIndices && mSpanIndexCache.size() > 0) {
+                int prevKey = findReferenceIndexFromCache(position);
+                if (prevKey >= 0) {
+                    span = mSpanIndexCache.get(prevKey) + getSpanSize(prevKey);
+                    startPos = prevKey + 1;
+                }
+            }
+            for (int i = startPos; i < position; i++) {
+                int size = getSpanSize(i);
+                span += size;
+                if (span == spanCount) {
+                    span = 0;
+                } else if (span > spanCount) {
+                    // did not fit, moving to next row / column
+                    span = size;
+                }
+            }
+            if (span + positionSpanSize <= spanCount) {
+                return span;
+            }
+            return 0;
+        }
+
+        int findReferenceIndexFromCache(int position) {
+            int lo = 0;
+            int hi = mSpanIndexCache.size() - 1;
+
+            while (lo <= hi) {
+                final int mid = (lo + hi) >>> 1;
+                final int midVal = mSpanIndexCache.keyAt(mid);
+                if (midVal < position) {
+                    lo = mid + 1;
+                } else {
+                    hi = mid - 1;
+                }
+            }
+            int index = lo - 1;
+            if (index >= 0 && index < mSpanIndexCache.size()) {
+                return mSpanIndexCache.keyAt(index);
+            }
+            return -1;
+        }
+
+        /**
+         * Returns the index of the group this position belongs.
+         * <p>
+         * For example, if grid has 3 columns and each item occupies 1 span, span group index
+         * for item 1 will be 0, item 5 will be 1.
+         *
+         * @param adapterPosition The position in adapter
+         * @param spanCount The total number of spans in the grid
+         * @return The index of the span group including the item at the given adapter position
+         */
+        public int getSpanGroupIndex(int adapterPosition, int spanCount) {
+            int span = 0;
+            int group = 0;
+            int positionSpanSize = getSpanSize(adapterPosition);
+            for (int i = 0; i < adapterPosition; i++) {
+                int size = getSpanSize(i);
+                span += size;
+                if (span == spanCount) {
+                    span = 0;
+                    group++;
+                } else if (span > spanCount) {
+                    // did not fit, moving to next row / column
+                    span = size;
+                    group++;
+                }
+            }
+            if (span + positionSpanSize > spanCount) {
+                group++;
+            }
+            return group;
+        }
+    }
+
+    @Override
+    public boolean supportsPredictiveItemAnimations() {
+        return mPendingSavedState == null;
+    }
+
+    /**
+     * Default implementation for {@link SpanSizeLookup}. Each item occupies 1 span.
+     */
+    public static final class DefaultSpanSizeLookup extends SpanSizeLookup {
+
+        @Override
+        public int getSpanSize(int position) {
+            return 1;
+        }
+
+        @Override
+        public int getSpanIndex(int position, int spanCount) {
+            return position % spanCount;
+        }
+    }
+
+    /**
+     * LayoutParams used by GridLayoutManager.
+     */
+    public static class LayoutParams extends RecyclerView.LayoutParams {
+
+        /**
+         * Span Id for Views that are not laid out yet.
+         */
+        public static final int INVALID_SPAN_ID = -1;
+
+        private int mSpanIndex = INVALID_SPAN_ID;
+
+        private int mSpanSize = 0;
+
+        public LayoutParams(Context c, AttributeSet attrs) {
+            super(c, attrs);
+        }
+
+        public LayoutParams(int width, int height) {
+            super(width, height);
+        }
+
+        public LayoutParams(ViewGroup.MarginLayoutParams source) {
+            super(source);
+        }
+
+        public LayoutParams(ViewGroup.LayoutParams source) {
+            super(source);
+        }
+
+        public LayoutParams(RecyclerView.LayoutParams source) {
+            super(source);
+        }
+
+        /**
+         * Returns the current span index of this View. If the View is not laid out yet, the return
+         * value is <code>undefined</code>.
+         * <p>
+         * Note that span index may change by whether the RecyclerView is RTL or not. For
+         * example, if the number of spans is 3 and layout is RTL, the rightmost item will have
+         * span index of 2. If the layout changes back to LTR, span index for this view will be 0.
+         * If the item was occupying 2 spans, span indices would be 1 and 0 respectively.
+         * <p>
+         * If the View occupies multiple spans, span with the minimum index is returned.
+         *
+         * @return The span index of the View.
+         */
+        public int getSpanIndex() {
+            return mSpanIndex;
+        }
+
+        /**
+         * Returns the number of spans occupied by this View. If the View not laid out yet, the
+         * return value is <code>undefined</code>.
+         *
+         * @return The number of spans occupied by this View.
+         */
+        public int getSpanSize() {
+            return mSpanSize;
+        }
+    }
+
+}

app/src/main/java/android/support/v7/widget/LayoutState.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific languag`e governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+import android.view.View;
+
+/**
+ * Helper class that keeps temporary state while {LayoutManager} is filling out the empty
+ * space.
+ */
+class LayoutState {
+
+    final static String TAG = "LayoutState";
+
+    final static int LAYOUT_START = -1;
+
+    final static int LAYOUT_END = 1;
+
+    final static int INVALID_LAYOUT = Integer.MIN_VALUE;
+
+    final static int ITEM_DIRECTION_HEAD = -1;
+
+    final static int ITEM_DIRECTION_TAIL = 1;
+
+    final static int SCOLLING_OFFSET_NaN = Integer.MIN_VALUE;
+
+    /**
+     * Number of pixels that we should fill, in the layout direction.
+     */
+    int mAvailable;
+
+    /**
+     * Current position on the adapter to get the next item.
+     */
+    int mCurrentPosition;
+
+    /**
+     * Defines the direction in which the data adapter is traversed.
+     * Should be {@link #ITEM_DIRECTION_HEAD} or {@link #ITEM_DIRECTION_TAIL}
+     */
+    int mItemDirection;
+
+    /**
+     * Defines the direction in which the layout is filled.
+     * Should be {@link #LAYOUT_START} or {@link #LAYOUT_END}
+     */
+    int mLayoutDirection;
+
+    /**
+     * Used if you want to pre-layout items that are not yet visible.
+     * The difference with {@link #mAvailable} is that, when recycling, distance rendered for
+     * {@link #mExtra} is not considered not to recycle visible children.
+     */
+    int mExtra = 0;
+
+    /**
+     * @return true if there are more items in the data adapter
+     */
+    boolean hasMore(RecyclerView.State state) {
+        return mCurrentPosition >= 0 && mCurrentPosition < state.getItemCount();
+    }
+
+    /**
+     * Gets the view for the next element that we should render.
+     * Also updates current item index to the next item, based on {@link #mItemDirection}
+     *
+     * @return The next element that we should render.
+     */
+    View next(RecyclerView.Recycler recycler) {
+        final View view = recycler.getViewForPosition(mCurrentPosition);
+        mCurrentPosition += mItemDirection;
+        return view;
+    }
+}

app/src/main/java/android/support/v7/widget/LinearSmoothScroller.java

@@ -0,0 +1,338 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+
+import android.content.Context;
+import android.graphics.PointF;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.View;
+import android.view.animation.DecelerateInterpolator;
+import android.view.animation.LinearInterpolator;
+
+/**
+ * {@link RecyclerView.SmoothScroller} implementation which uses
+ * {@link LinearInterpolator} until the target position becames a child of
+ * the RecyclerView and then uses
+ * {@link DecelerateInterpolator} to slowly approach to target position.
+ */
+abstract public class LinearSmoothScroller extends RecyclerView.SmoothScroller {
+
+    private static final String TAG = "LinearSmoothScroller";
+
+    private static final boolean DEBUG = false;
+
+    private static final float MILLISECONDS_PER_INCH = 25f;
+
+    private static final int TARGET_SEEK_SCROLL_DISTANCE_PX = 10000;
+
+    /**
+     * Align child view's left or top with parent view's left or top
+     *
+     * @see #calculateDtToFit(int, int, int, int, int)
+     * @see #calculateDxToMakeVisible(View, int)
+     * @see #calculateDyToMakeVisible(View, int)
+     */
+    public static final int SNAP_TO_START = -1;
+
+    /**
+     * Align child view's right or bottom with parent view's right or bottom
+     *
+     * @see #calculateDtToFit(int, int, int, int, int)
+     * @see #calculateDxToMakeVisible(View, int)
+     * @see #calculateDyToMakeVisible(View, int)
+     */
+    public static final int SNAP_TO_END = 1;
+
+    /**
+     * <p>Decides if the child should be snapped from start or end, depending on where it
+     * currently is in relation to its parent.</p>
+     * <p>For instance, if the view is virtually on the left of RecyclerView, using
+     * {@code SNAP_TO_ANY} is the same as using {@code SNAP_TO_START}</p>
+     *
+     * @see #calculateDtToFit(int, int, int, int, int)
+     * @see #calculateDxToMakeVisible(View, int)
+     * @see #calculateDyToMakeVisible(View, int)
+     */
+    public static final int SNAP_TO_ANY = 0;
+
+    // Trigger a scroll to a further distance than TARGET_SEEK_SCROLL_DISTANCE_PX so that if target
+    // view is not laid out until interim target position is reached, we can detect the case before
+    // scrolling slows down and reschedule another interim target scroll
+    private static final float TARGET_SEEK_EXTRA_SCROLL_RATIO = 1.2f;
+
+    protected final LinearInterpolator mLinearInterpolator = new LinearInterpolator();
+
+    protected final DecelerateInterpolator mDecelerateInterpolator = new DecelerateInterpolator();
+
+    protected PointF mTargetVector;
+
+    private final float MILLISECONDS_PER_PX;
+
+    // Temporary variables to keep track of the interim scroll target. These values do not
+    // point to a real item position, rather point to an estimated location pixels.
+    protected int mInterimTargetDx = 0, mInterimTargetDy = 0;
+
+    public LinearSmoothScroller(Context context) {
+        MILLISECONDS_PER_PX = calculateSpeedPerPixel(context.getResources().getDisplayMetrics());
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected void onStart() {
+
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected void onTargetFound(View targetView, RecyclerView.State state, Action action) {
+        final int dx = calculateDxToMakeVisible(targetView, getHorizontalSnapPreference());
+        final int dy = calculateDyToMakeVisible(targetView, getVerticalSnapPreference());
+        final int distance = (int) Math.sqrt(dx * dx + dy * dy);
+        final int time = calculateTimeForDeceleration(distance);
+        if (time > 0) {
+            action.update(-dx, -dy, time, mDecelerateInterpolator);
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected void onSeekTargetStep(int dx, int dy, RecyclerView.State state, Action action) {
+        if (getChildCount() == 0) {
+            stop();
+            return;
+        }
+        if (DEBUG && mTargetVector != null
+                && ((mTargetVector.x * dx < 0 || mTargetVector.y * dy < 0))) {
+            throw new IllegalStateException("Scroll happened in the opposite direction"
+                    + " of the target. Some calculations are wrong");
+        }
+        mInterimTargetDx = clampApplyScroll(mInterimTargetDx, dx);
+        mInterimTargetDy = clampApplyScroll(mInterimTargetDy, dy);
+
+        if (mInterimTargetDx == 0 && mInterimTargetDy == 0) {
+            updateActionForInterimTarget(action);
+        } // everything is valid, keep going
+
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected void onStop() {
+        mInterimTargetDx = mInterimTargetDy = 0;
+        mTargetVector = null;
+    }
+
+    /**
+     * Calculates the scroll speed.
+     *
+     * @param displayMetrics DisplayMetrics to be used for real dimension calculations
+     * @return The time (in ms) it should take for each pixel. For instance, if returned value is
+     * 2 ms, it means scrolling 1000 pixels with LinearInterpolation should take 2 seconds.
+     */
+    protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
+        return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
+    }
+
+    /**
+     * <p>Calculates the time for deceleration so that transition from LinearInterpolator to
+     * DecelerateInterpolator looks smooth.</p>
+     *
+     * @param dx Distance to scroll
+     * @return Time for DecelerateInterpolator to smoothly traverse the distance when transitioning
+     * from LinearInterpolation
+     */
+    protected int calculateTimeForDeceleration(int dx) {
+        // we want to cover same area with the linear interpolator for the first 10% of the
+        // interpolation. After that, deceleration will take control.
+        // area under curve (1-(1-x)^2) can be calculated as (1 - x/3) * x * x
+        // which gives 0.100028 when x = .3356
+        // this is why we divide linear scrolling time with .3356
+        return  (int) Math.ceil(calculateTimeForScrolling(dx) / .3356);
+    }
+
+    /**
+     * Calculates the time it should take to scroll the given distance (in pixels)
+     *
+     * @param dx Distance in pixels that we want to scroll
+     * @return Time in milliseconds
+     * @see #calculateSpeedPerPixel(DisplayMetrics)
+     */
+    protected int calculateTimeForScrolling(int dx) {
+        // In a case where dx is very small, rounding may return 0 although dx > 0.
+        // To avoid that issue, ceil the result so that if dx > 0, we'll always return positive
+        // time.
+        return (int) Math.ceil(Math.abs(dx) * MILLISECONDS_PER_PX);
+    }
+
+    /**
+     * When scrolling towards a child view, this method defines whether we should align the left
+     * or the right edge of the child with the parent RecyclerView.
+     *
+     * @return SNAP_TO_START, SNAP_TO_END or SNAP_TO_ANY; depending on the current target vector
+     * @see #SNAP_TO_START
+     * @see #SNAP_TO_END
+     * @see #SNAP_TO_ANY
+     */
+    protected int getHorizontalSnapPreference() {
+        return mTargetVector == null || mTargetVector.x == 0 ? SNAP_TO_ANY :
+                mTargetVector.x > 0 ? SNAP_TO_END : SNAP_TO_START;
+    }
+
+    /**
+     * When scrolling towards a child view, this method defines whether we should align the top
+     * or the bottom edge of the child with the parent RecyclerView.
+     *
+     * @return SNAP_TO_START, SNAP_TO_END or SNAP_TO_ANY; depending on the current target vector
+     * @see #SNAP_TO_START
+     * @see #SNAP_TO_END
+     * @see #SNAP_TO_ANY
+     */
+    protected int getVerticalSnapPreference() {
+        return mTargetVector == null || mTargetVector.y == 0 ? SNAP_TO_ANY :
+                mTargetVector.y > 0 ? SNAP_TO_END : SNAP_TO_START;
+    }
+
+    /**
+     * When the target scroll position is not a child of the RecyclerView, this method calculates
+     * a direction vector towards that child and triggers a smooth scroll.
+     *
+     * @see #computeScrollVectorForPosition(int)
+     */
+    protected void updateActionForInterimTarget(Action action) {
+        // find an interim target position
+        PointF scrollVector = computeScrollVectorForPosition(getTargetPosition());
+        if (scrollVector == null || (scrollVector.x == 0 && scrollVector.y == 0)) {
+            Log.e(TAG, "To support smooth scrolling, you should override \n"
+                    + "LayoutManager#computeScrollVectorForPosition.\n"
+                    + "Falling back to instant scroll");
+            final int target = getTargetPosition();
+            stop();
+            instantScrollToPosition(target);
+            return;
+        }
+        normalize(scrollVector);
+        mTargetVector = scrollVector;
+
+        mInterimTargetDx = (int) (TARGET_SEEK_SCROLL_DISTANCE_PX * scrollVector.x);
+        mInterimTargetDy = (int) (TARGET_SEEK_SCROLL_DISTANCE_PX * scrollVector.y);
+        final int time = calculateTimeForScrolling(TARGET_SEEK_SCROLL_DISTANCE_PX);
+        // To avoid UI hiccups, trigger a smooth scroll to a distance little further than the
+        // interim target. Since we track the distance travelled in onSeekTargetStep callback, it
+        // won't actually scroll more than what we need.
+        action.update((int) (mInterimTargetDx * TARGET_SEEK_EXTRA_SCROLL_RATIO)
+                , (int) (mInterimTargetDy * TARGET_SEEK_EXTRA_SCROLL_RATIO)
+                , (int) (time * TARGET_SEEK_EXTRA_SCROLL_RATIO), mLinearInterpolator);
+    }
+
+    private int clampApplyScroll(int tmpDt, int dt) {
+        final int before = tmpDt;
+        tmpDt -= dt;
+        if (before * tmpDt <= 0) { // changed sign, reached 0 or was 0, reset
+            return 0;
+        }
+        return tmpDt;
+    }
+
+    /**
+     * Helper method for {@link #calculateDxToMakeVisible(View, int)} and
+     * {@link #calculateDyToMakeVisible(View, int)}
+     */
+    public int calculateDtToFit(int viewStart, int viewEnd, int boxStart, int boxEnd, int
+            snapPreference) {
+        switch (snapPreference) {
+            case SNAP_TO_START:
+                return boxStart - viewStart;
+            case SNAP_TO_END:
+                return boxEnd - viewEnd;
+            case SNAP_TO_ANY:
+                final int dtStart = boxStart - viewStart;
+                if (dtStart > 0) {
+                    return dtStart;
+                }
+                final int dtEnd = boxEnd - viewEnd;
+                if (dtEnd < 0) {
+                    return dtEnd;
+                }
+                break;
+            default:
+                throw new IllegalArgumentException("snap preference should be one of the"
+                        + " constants defined in SmoothScroller, starting with SNAP_");
+        }
+        return 0;
+    }
+
+    /**
+     * Calculates the vertical scroll amount necessary to make the given view fully visible
+     * inside the RecyclerView.
+     *
+     * @param view           The view which we want to make fully visible
+     * @param snapPreference The edge which the view should snap to when entering the visible
+     *                       area. One of {@link #SNAP_TO_START}, {@link #SNAP_TO_END} or
+     *                       {@link #SNAP_TO_END}.
+     * @return The vertical scroll amount necessary to make the view visible with the given
+     * snap preference.
+     */
+    public int calculateDyToMakeVisible(View view, int snapPreference) {
+        final RecyclerView.LayoutManager layoutManager = getLayoutManager();
+        if (!layoutManager.canScrollVertically()) {
+            return 0;
+        }
+        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                view.getLayoutParams();
+        final int top = layoutManager.getDecoratedTop(view) - params.topMargin;
+        final int bottom = layoutManager.getDecoratedBottom(view) + params.bottomMargin;
+        final int start = layoutManager.getPaddingTop();
+        final int end = layoutManager.getHeight() - layoutManager.getPaddingBottom();
+        return calculateDtToFit(top, bottom, start, end, snapPreference);
+    }
+
+    /**
+     * Calculates the horizontal scroll amount necessary to make the given view fully visible
+     * inside the RecyclerView.
+     *
+     * @param view           The view which we want to make fully visible
+     * @param snapPreference The edge which the view should snap to when entering the visible
+     *                       area. One of {@link #SNAP_TO_START}, {@link #SNAP_TO_END} or
+     *                       {@link #SNAP_TO_END}
+     * @return The vertical scroll amount necessary to make the view visible with the given
+     * snap preference.
+     */
+    public int calculateDxToMakeVisible(View view, int snapPreference) {
+        final RecyclerView.LayoutManager layoutManager = getLayoutManager();
+        if (!layoutManager.canScrollHorizontally()) {
+            return 0;
+        }
+        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                view.getLayoutParams();
+        final int left = layoutManager.getDecoratedLeft(view) - params.leftMargin;
+        final int right = layoutManager.getDecoratedRight(view) + params.rightMargin;
+        final int start = layoutManager.getPaddingLeft();
+        final int end = layoutManager.getWidth() - layoutManager.getPaddingRight();
+        return calculateDtToFit(left, right, start, end, snapPreference);
+    }
+
+    abstract public PointF computeScrollVectorForPosition(int targetPosition);
+}

app/src/main/java/android/support/v7/widget/OpReorderer.java

@@ -0,0 +1,238 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+
+import android.support.v7.widget.AdapterHelper.UpdateOp;
+
+import java.util.List;
+
+import static android.support.v7.widget.AdapterHelper.UpdateOp.ADD;
+import static android.support.v7.widget.AdapterHelper.UpdateOp.MOVE;
+import static android.support.v7.widget.AdapterHelper.UpdateOp.REMOVE;
+import static android.support.v7.widget.AdapterHelper.UpdateOp.UPDATE;
+
+class OpReorderer {
+
+    final Callback mCallback;
+
+    public OpReorderer(Callback callback) {
+        mCallback = callback;
+    }
+
+    void reorderOps(List<UpdateOp> ops) {
+        // since move operations breaks continuity, their effects on ADD/RM are hard to handle.
+        // we push them to the end of the list so that they can be handled easily.
+        int badMove;
+        while ((badMove = getLastMoveOutOfOrder(ops)) != -1) {
+            swapMoveOp(ops, badMove, badMove + 1);
+        }
+    }
+
+    private void swapMoveOp(List<UpdateOp> list, int badMove, int next) {
+        final UpdateOp moveOp = list.get(badMove);
+        final UpdateOp nextOp = list.get(next);
+        switch (nextOp.cmd) {
+            case REMOVE:
+                swapMoveRemove(list, badMove, moveOp, next, nextOp);
+                break;
+            case ADD:
+                swapMoveAdd(list, badMove, moveOp, next, nextOp);
+                break;
+            case UPDATE:
+                swapMoveUpdate(list, badMove, moveOp, next, nextOp);
+                break;
+        }
+    }
+
+    void swapMoveRemove(List<UpdateOp> list, int movePos, UpdateOp moveOp,
+            int removePos, UpdateOp removeOp) {
+        UpdateOp extraRm = null;
+        // check if move is nulled out by remove
+        boolean revertedMove = false;
+        final boolean moveIsBackwards;
+
+        if (moveOp.positionStart < moveOp.itemCount) {
+            moveIsBackwards = false;
+            if (removeOp.positionStart == moveOp.positionStart
+                    && removeOp.itemCount == moveOp.itemCount - moveOp.positionStart) {
+                revertedMove = true;
+            }
+        } else {
+            moveIsBackwards = true;
+            if (removeOp.positionStart == moveOp.itemCount + 1 &&
+                    removeOp.itemCount == moveOp.positionStart - moveOp.itemCount) {
+                revertedMove = true;
+            }
+        }
+
+        // going in reverse, first revert the effect of add
+        if (moveOp.itemCount < removeOp.positionStart) {
+            removeOp.positionStart--;
+        } else if (moveOp.itemCount < removeOp.positionStart + removeOp.itemCount) {
+            // move is removed.
+            removeOp.itemCount --;
+            moveOp.cmd = REMOVE;
+            moveOp.itemCount = 1;
+            if (removeOp.itemCount == 0) {
+                list.remove(removePos);
+                mCallback.recycleUpdateOp(removeOp);
+            }
+            // no need to swap, it is already a remove
+            return;
+        }
+
+        // now affect of add is consumed. now apply effect of first remove
+        if (moveOp.positionStart <= removeOp.positionStart) {
+            removeOp.positionStart++;
+        } else if (moveOp.positionStart < removeOp.positionStart + removeOp.itemCount) {
+            final int remaining = removeOp.positionStart + removeOp.itemCount
+                    - moveOp.positionStart;
+            extraRm = mCallback.obtainUpdateOp(REMOVE, moveOp.positionStart + 1, remaining);
+            removeOp.itemCount = moveOp.positionStart - removeOp.positionStart;
+        }
+
+        // if effects of move is reverted by remove, we are done.
+        if (revertedMove) {
+            list.set(movePos, removeOp);
+            list.remove(removePos);
+            mCallback.recycleUpdateOp(moveOp);
+            return;
+        }
+
+        // now find out the new locations for move actions
+        if (moveIsBackwards) {
+            if (extraRm != null) {
+                if (moveOp.positionStart > extraRm.positionStart) {
+                    moveOp.positionStart -= extraRm.itemCount;
+                }
+                if (moveOp.itemCount > extraRm.positionStart) {
+                    moveOp.itemCount -= extraRm.itemCount;
+                }
+            }
+            if (moveOp.positionStart > removeOp.positionStart) {
+                moveOp.positionStart -= removeOp.itemCount;
+            }
+            if (moveOp.itemCount > removeOp.positionStart) {
+                moveOp.itemCount -= removeOp.itemCount;
+            }
+        } else {
+            if (extraRm != null) {
+                if (moveOp.positionStart >= extraRm.positionStart) {
+                    moveOp.positionStart -= extraRm.itemCount;
+                }
+                if (moveOp.itemCount >= extraRm.positionStart) {
+                    moveOp.itemCount -= extraRm.itemCount;
+                }
+            }
+            if (moveOp.positionStart >= removeOp.positionStart) {
+                moveOp.positionStart -= removeOp.itemCount;
+            }
+            if (moveOp.itemCount >= removeOp.positionStart) {
+                moveOp.itemCount -= removeOp.itemCount;
+            }
+        }
+
+        list.set(movePos, removeOp);
+        if (moveOp.positionStart != moveOp.itemCount) {
+            list.set(removePos, moveOp);
+        } else {
+            list.remove(removePos);
+        }
+        if (extraRm != null) {
+            list.add(movePos, extraRm);
+        }
+    }
+
+    private void swapMoveAdd(List<UpdateOp> list, int move, UpdateOp moveOp, int add,
+            UpdateOp addOp) {
+        int offset = 0;
+        // going in reverse, first revert the effect of add
+        if (moveOp.itemCount < addOp.positionStart) {
+            offset--;
+        }
+        if (moveOp.positionStart < addOp.positionStart) {
+            offset++;
+        }
+        if (addOp.positionStart <= moveOp.positionStart) {
+            moveOp.positionStart += addOp.itemCount;
+        }
+        if (addOp.positionStart <= moveOp.itemCount) {
+            moveOp.itemCount += addOp.itemCount;
+        }
+        addOp.positionStart += offset;
+        list.set(move, addOp);
+        list.set(add, moveOp);
+    }
+
+    void swapMoveUpdate(List<UpdateOp> list, int move, UpdateOp moveOp, int update,
+            UpdateOp updateOp) {
+        UpdateOp extraUp1 = null;
+        UpdateOp extraUp2 = null;
+        // going in reverse, first revert the effect of add
+        if (moveOp.itemCount < updateOp.positionStart) {
+            updateOp.positionStart--;
+        } else if (moveOp.itemCount < updateOp.positionStart + updateOp.itemCount) {
+            // moved item is updated. add an update for it
+            updateOp.itemCount--;
+            extraUp1 = mCallback.obtainUpdateOp(UPDATE, moveOp.positionStart, 1);
+        }
+        // now affect of add is consumed. now apply effect of first remove
+        if (moveOp.positionStart <= updateOp.positionStart) {
+            updateOp.positionStart++;
+        } else if (moveOp.positionStart < updateOp.positionStart + updateOp.itemCount) {
+            final int remaining = updateOp.positionStart + updateOp.itemCount
+                    - moveOp.positionStart;
+            extraUp2 = mCallback.obtainUpdateOp(UPDATE, moveOp.positionStart + 1, remaining);
+            updateOp.itemCount -= remaining;
+        }
+        list.set(update, moveOp);
+        if (updateOp.itemCount > 0) {
+            list.set(move, updateOp);
+        } else {
+            list.remove(move);
+            mCallback.recycleUpdateOp(updateOp);
+        }
+        if (extraUp1 != null) {
+            list.add(move, extraUp1);
+        }
+        if (extraUp2 != null) {
+            list.add(move, extraUp2);
+        }
+    }
+
+    private int getLastMoveOutOfOrder(List<UpdateOp> list) {
+        boolean foundNonMove = false;
+        for (int i = list.size() - 1; i >= 0; i--) {
+            final UpdateOp op1 = list.get(i);
+            if (op1.cmd == MOVE) {
+                if (foundNonMove) {
+                    return i;
+                }
+            } else {
+                foundNonMove = true;
+            }
+        }
+        return -1;
+    }
+
+    static interface Callback {
+
+        UpdateOp obtainUpdateOp(int cmd, int startPosition, int itemCount);
+
+        void recycleUpdateOp(UpdateOp op);
+    }
+}

app/src/main/java/android/support/v7/widget/OrientationHelper.java

@@ -0,0 +1,338 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+
+import android.view.View;
+import android.widget.LinearLayout;
+
+/**
+ * Helper class for LayoutManagers to abstract measurements depending on the View's orientation.
+ * <p>
+ * It is developed to easily support vertical and horizontal orientations in a LayoutManager but
+ * can also be used to abstract calls around view bounds and child measurements with margins and
+ * decorations.
+ *
+ * @see #createHorizontalHelper(RecyclerView.LayoutManager)
+ * @see #createVerticalHelper(RecyclerView.LayoutManager)
+ */
+public abstract class OrientationHelper {
+
+    private static final int INVALID_SIZE = Integer.MIN_VALUE;
+
+    protected final RecyclerView.LayoutManager mLayoutManager;
+
+    public static final int HORIZONTAL = LinearLayout.HORIZONTAL;
+
+    public static final int VERTICAL = LinearLayout.VERTICAL;
+
+    private int mLastTotalSpace = INVALID_SIZE;
+
+    private OrientationHelper(RecyclerView.LayoutManager layoutManager) {
+        mLayoutManager = layoutManager;
+    }
+
+    /**
+     * Call this method after onLayout method is complete if state is NOT pre-layout.
+     * This method records information like layout bounds that might be useful in the next layout
+     * calculations.
+     */
+    public void onLayoutComplete() {
+        mLastTotalSpace = getTotalSpace();
+    }
+
+    /**
+     * Returns the layout space change between the previous layout pass and current layout pass.
+     * <p>
+     * Make sure you call {@link #onLayoutComplete()} at the end of your LayoutManager's
+     * {@link RecyclerView.LayoutManager#onLayoutChildren(RecyclerView.Recycler,
+     * RecyclerView.State)} method.
+     *
+     * @return The difference between the current total space and previous layout's total space.
+     * @see #onLayoutComplete()
+     */
+    public int getTotalSpaceChange() {
+        return INVALID_SIZE == mLastTotalSpace ? 0 : getTotalSpace() - mLastTotalSpace;
+    }
+
+    /**
+     * Returns the start of the view including its decoration and margin.
+     * <p>
+     * For example, for the horizontal helper, if a View's left is at pixel 20, has 2px left
+     * decoration and 3px left margin, returned value will be 15px.
+     *
+     * @param view The view element to check
+     * @return The first pixel of the element
+     * @see #getDecoratedEnd(View)
+     */
+    public abstract int getDecoratedStart(View view);
+
+    /**
+     * Returns the end of the view including its decoration and margin.
+     * <p>
+     * For example, for the horizontal helper, if a View's right is at pixel 200, has 2px right
+     * decoration and 3px right margin, returned value will be 205.
+     *
+     * @param view The view element to check
+     * @return The last pixel of the element
+     * @see #getDecoratedStart(View)
+     */
+    public abstract int getDecoratedEnd(View view);
+
+    /**
+     * Returns the space occupied by this View in the current orientation including decorations and
+     * margins.
+     *
+     * @param view The view element to check
+     * @return Total space occupied by this view
+     * @see #getDecoratedMeasurementInOther(View)
+     */
+    public abstract int getDecoratedMeasurement(View view);
+
+    /**
+     * Returns the space occupied by this View in the perpendicular orientation including
+     * decorations and margins.
+     *
+     * @param view The view element to check
+     * @return Total space occupied by this view in the perpendicular orientation to current one
+     * @see #getDecoratedMeasurement(View)
+     */
+    public abstract int getDecoratedMeasurementInOther(View view);
+
+    /**
+     * Returns the start position of the layout after the start padding is added.
+     *
+     * @return The very first pixel we can draw.
+     */
+    public abstract int getStartAfterPadding();
+
+    /**
+     * Returns the end position of the layout after the end padding is removed.
+     *
+     * @return The end boundary for this layout.
+     */
+    public abstract int getEndAfterPadding();
+
+    /**
+     * Returns the end position of the layout without taking padding into account.
+     *
+     * @return The end boundary for this layout without considering padding.
+     */
+    public abstract int getEnd();
+
+    /**
+     * Offsets all children's positions by the given amount.
+     *
+     * @param amount Value to add to each child's layout parameters
+     */
+    public abstract void offsetChildren(int amount);
+
+    /**
+     * Returns the total space to layout. This number is the difference between
+     * {@link #getEndAfterPadding()} and {@link #getStartAfterPadding()}.
+     *
+     * @return Total space to layout children
+     */
+    public abstract int getTotalSpace();
+
+    /**
+     * Offsets the child in this orientation.
+     *
+     * @param view   View to offset
+     * @param offset offset amount
+     */
+    public abstract void offsetChild(View view, int offset);
+
+    /**
+     * Returns the padding at the end of the layout. For horizontal helper, this is the right
+     * padding and for vertical helper, this is the bottom padding. This method does not check
+     * whether the layout is RTL or not.
+     *
+     * @return The padding at the end of the layout.
+     */
+    public abstract int getEndPadding();
+
+    /**
+     * Creates an OrientationHelper for the given LayoutManager and orientation.
+     *
+     * @param layoutManager LayoutManager to attach to
+     * @param orientation   Desired orientation. Should be {@link #HORIZONTAL} or {@link #VERTICAL}
+     * @return A new OrientationHelper
+     */
+    public static OrientationHelper createOrientationHelper(
+            RecyclerView.LayoutManager layoutManager, int orientation) {
+        switch (orientation) {
+            case HORIZONTAL:
+                return createHorizontalHelper(layoutManager);
+            case VERTICAL:
+                return createVerticalHelper(layoutManager);
+        }
+        throw new IllegalArgumentException("invalid orientation");
+    }
+
+    /**
+     * Creates a horizontal OrientationHelper for the given LayoutManager.
+     *
+     * @param layoutManager The LayoutManager to attach to.
+     * @return A new OrientationHelper
+     */
+    public static OrientationHelper createHorizontalHelper(
+            RecyclerView.LayoutManager layoutManager) {
+        return new OrientationHelper(layoutManager) {
+            @Override
+            public int getEndAfterPadding() {
+                return mLayoutManager.getWidth() - mLayoutManager.getPaddingRight();
+            }
+
+            @Override
+            public int getEnd() {
+                return mLayoutManager.getWidth();
+            }
+
+            @Override
+            public void offsetChildren(int amount) {
+                mLayoutManager.offsetChildrenHorizontal(amount);
+            }
+
+            @Override
+            public int getStartAfterPadding() {
+                return mLayoutManager.getPaddingLeft();
+            }
+
+            @Override
+            public int getDecoratedMeasurement(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedMeasuredWidth(view) + params.leftMargin
+                        + params.rightMargin;
+            }
+
+            @Override
+            public int getDecoratedMeasurementInOther(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedMeasuredHeight(view) + params.topMargin
+                        + params.bottomMargin;
+            }
+
+            @Override
+            public int getDecoratedEnd(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedRight(view) + params.rightMargin;
+            }
+
+            @Override
+            public int getDecoratedStart(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedLeft(view) - params.leftMargin;
+            }
+
+            @Override
+            public int getTotalSpace() {
+                return mLayoutManager.getWidth() - mLayoutManager.getPaddingLeft()
+                        - mLayoutManager.getPaddingRight();
+            }
+
+            @Override
+            public void offsetChild(View view, int offset) {
+                view.offsetLeftAndRight(offset);
+            }
+
+            @Override
+            public int getEndPadding() {
+                return mLayoutManager.getPaddingRight();
+            }
+        };
+    }
+
+    /**
+     * Creates a vertical OrientationHelper for the given LayoutManager.
+     *
+     * @param layoutManager The LayoutManager to attach to.
+     * @return A new OrientationHelper
+     */
+    public static OrientationHelper createVerticalHelper(RecyclerView.LayoutManager layoutManager) {
+        return new OrientationHelper(layoutManager) {
+            @Override
+            public int getEndAfterPadding() {
+                return mLayoutManager.getHeight() - mLayoutManager.getPaddingBottom();
+            }
+
+            @Override
+            public int getEnd() {
+                return mLayoutManager.getHeight();
+            }
+
+            @Override
+            public void offsetChildren(int amount) {
+                mLayoutManager.offsetChildrenVertical(amount);
+            }
+
+            @Override
+            public int getStartAfterPadding() {
+                return mLayoutManager.getPaddingTop();
+            }
+
+            @Override
+            public int getDecoratedMeasurement(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedMeasuredHeight(view) + params.topMargin
+                        + params.bottomMargin;
+            }
+
+            @Override
+            public int getDecoratedMeasurementInOther(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedMeasuredWidth(view) + params.leftMargin
+                        + params.rightMargin;
+            }
+
+            @Override
+            public int getDecoratedEnd(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedBottom(view) + params.bottomMargin;
+            }
+
+            @Override
+            public int getDecoratedStart(View view) {
+                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
+                        view.getLayoutParams();
+                return mLayoutManager.getDecoratedTop(view) - params.topMargin;
+            }
+
+            @Override
+            public int getTotalSpace() {
+                return mLayoutManager.getHeight() - mLayoutManager.getPaddingTop()
+                        - mLayoutManager.getPaddingBottom();
+            }
+
+            @Override
+            public void offsetChild(View view, int offset) {
+                view.offsetTopAndBottom(offset);
+            }
+
+            @Override
+            public int getEndPadding() {
+                return mLayoutManager.getPaddingBottom();
+            }
+        };
+    }
+}

app/src/main/java/android/support/v7/widget/PositionMap.java

@@ -0,0 +1,460 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.support.v7.widget;
+
+import java.util.ArrayList;
+
+/**
+ * Like a SparseArray, but with the ability to offset key ranges for bulk insertions/deletions.
+ */
+class PositionMap<E> implements Cloneable {
+    private static final Object DELETED = new Object();
+    private boolean mGarbage = false;
+
+    private int[] mKeys;
+    private Object[] mValues;
+    private int mSize;
+
+    /**
+     * Creates a new SparseArray containing no mappings.
+     */
+    public PositionMap() {
+        this(10);
+    }
+
+    /**
+     * Creates a new PositionMap containing no mappings that will not
+     * require any additional memory allocation to store the specified
+     * number of mappings.  If you supply an initial capacity of 0, the
+     * sparse array will be initialized with a light-weight representation
+     * not requiring any additional array allocations.
+     */
+    public PositionMap(int initialCapacity) {
+        if (initialCapacity == 0) {
+            mKeys = ContainerHelpers.EMPTY_INTS;
+            mValues = ContainerHelpers.EMPTY_OBJECTS;
+        } else {
+            initialCapacity = idealIntArraySize(initialCapacity);
+            mKeys = new int[initialCapacity];
+            mValues = new Object[initialCapacity];
+        }
+        mSize = 0;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public PositionMap<E> clone() {
+        PositionMap<E> clone = null;
+        try {
+            clone = (PositionMap<E>) super.clone();
+            clone.mKeys = mKeys.clone();
+            clone.mValues = mValues.clone();
+        } catch (CloneNotSupportedException cnse) {
+            /* ignore */
+        }
+        return clone;
+    }
+
+    /**
+     * Gets the Object mapped from the specified key, or <code>null</code>
+     * if no such mapping has been made.
+     */
+    public E get(int key) {
+        return get(key, null);
+    }
+
+    /**
+     * Gets the Object mapped from the specified key, or the specified Object
+     * if no such mapping has been made.
+     */
+    @SuppressWarnings("unchecked")
+    public E get(int key, E valueIfKeyNotFound) {
+        int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
+
+        if (i < 0 || mValues[i] == DELETED) {
+            return valueIfKeyNotFound;
+        } else {
+            return (E) mValues[i];
+        }
+    }
+
+    /**
+     * Removes the mapping from the specified key, if there was any.
+     */
+    public void delete(int key) {
+        int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
+
+        if (i >= 0) {
+            if (mValues[i] != DELETED) {
+                mValues[i] = DELETED;
+                mGarbage = true;
+            }
+        }
+    }
+
+    /**
+     * Alias for {@link #delete(int)}.
+     */
+    public void remove(int key) {
+        delete(key);
+    }
+
+    /**
+     * Removes the mapping at the specified index.
+     */
+    public void removeAt(int index) {
+        if (mValues[index] != DELETED) {
+            mValues[index] = DELETED;
+            mGarbage = true;
+        }
+    }
+
+    /**
+     * Remove a range of mappings as a batch.
+     *
+     * @param index Index to begin at
+     * @param size Number of mappings to remove
+     */
+    public void removeAtRange(int index, int size) {
+        final int end = Math.min(mSize, index + size);
+        for (int i = index; i < end; i++) {
+            removeAt(i);
+        }
+    }
+
+    public void insertKeyRange(int keyStart, int count) {
+
+    }
+
+    public void removeKeyRange(ArrayList<E> removedItems, int keyStart, int count) {
+
+    }
+
+    private void gc() {
+        // Log.e("SparseArray", "gc start with " + mSize);
+
+        int n = mSize;
+        int o = 0;
+        int[] keys = mKeys;
+        Object[] values = mValues;
+
+        for (int i = 0; i < n; i++) {
+            Object val = values[i];
+
+            if (val != DELETED) {
+                if (i != o) {
+                    keys[o] = keys[i];
+                    values[o] = val;
+                    values[i] = null;
+                }
+
+                o++;
+            }
+        }
+
+        mGarbage = false;
+        mSize = o;
+
+        // Log.e("SparseArray", "gc end with " + mSize);
+    }
+
+    /**
+     * Adds a mapping from the specified key to the specified value,
+     * replacing the previous mapping from the specified key if there
+     * was one.
+     */
+    public void put(int key, E value) {
+        int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
+
+        if (i >= 0) {
+            mValues[i] = value;
+        } else {
+            i = ~i;
+
+            if (i < mSize && mValues[i] == DELETED) {
+                mKeys[i] = key;
+                mValues[i] = value;
+                return;
+            }
+
+            if (mGarbage && mSize >= mKeys.length) {
+                gc();
+
+                // Search again because indices may have changed.
+                i = ~ContainerHelpers.binarySearch(mKeys, mSize, key);
+            }
+
+            if (mSize >= mKeys.length) {
+                int n = idealIntArraySize(mSize + 1);
+
+                int[] nkeys = new int[n];
+                Object[] nvalues = new Object[n];
+
+                // Log.e("SparseArray", "grow " + mKeys.length + " to " + n);
+                System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length);
+                System.arraycopy(mValues, 0, nvalues, 0, mValues.length);
+
+                mKeys = nkeys;
+                mValues = nvalues;
+            }
+
+            if (mSize - i != 0) {
+                // Log.e("SparseArray", "move " + (mSize - i));
+                System.arraycopy(mKeys, i, mKeys, i + 1, mSize - i);
+                System.arraycopy(mValues, i, mValues, i + 1, mSize - i);
+            }
+
+            mKeys[i] = key;
+            mValues[i] = value;
+            mSize++;
+        }
+    }
+
+    /**
+     * Returns the number of key-value mappings that this SparseArray
+     * currently stores.
+     */
+    public int size() {
+        if (mGarbage) {
+            gc();
+        }
+
+        return mSize;
+    }
+
+    /**
+     * Given an index in the range <code>0...size()-1</code>, returns
+     * the key from the <code>index</code>th key-value mapping that this
+     * SparseArray stores.
+     */
+    public int keyAt(int index) {
+        if (mGarbage) {
+            gc();
+        }
+
+        return mKeys[index];
+    }
+
+    /**
+     * Given an index in the range <code>0...size()-1</code>, returns
+     * the value from the <code>index</code>th key-value mapping that this
+     * SparseArray stores.
+     */
+    @SuppressWarnings("unchecked")
+    public E valueAt(int index) {
+        if (mGarbage) {
+            gc();
+        }
+
+        return (E) mValues[index];
+    }
+
+    /**
+     * Given an index in the range <code>0...size()-1</code>, sets a new
+     * value for the <code>index</code>th key-value mapping that this
+     * SparseArray stores.
+     */
+    public void setValueAt(int index, E value) {
+        if (mGarbage) {
+            gc();
+        }
+
+        mValues[index] = value;
+    }
+
+    /**
+     * Returns the index for which {@link #keyAt} would return the
+     * specified key, or a negative number if the specified
+     * key is not mapped.
+     */
+    public int indexOfKey(int key) {
+        if (mGarbage) {
+            gc();
+        }
+
+        return ContainerHelpers.binarySearch(mKeys, mSize, key);
+    }
+
+    /**
+     * Returns an index for which {@link #valueAt} would return the
+     * specified key, or a negative number if no keys map to the
+     * specified value.
+     * <p>Beware that this is a linear search, unlike lookups by key,
+     * and that multiple keys can map to the same value and this will
+     * find only one of them.
+     * <p>Note also that unlike most collections' {@code indexOf} methods,
+     * this method compares values using {@code ==} rather than {@code equals}.
+     */
+    public int indexOfValue(E value) {
+        if (mGarbage) {
+            gc();
+        }
+
+        for (int i = 0; i < mSize; i++)
+            if (mValues[i] == value)
+                return i;
+
+        return -1;
+    }
+
+    /**
+     * Removes all key-value mappings from this SparseArray.
+     */
+    public void clear() {
+        int n = mSize;
+        Object[] values = mValues;
+
+        for (int i = 0; i < n; i++) {
+            values[i] = null;
+        }
+
+        mSize = 0;
+        mGarbage = false;
+    }
+
+    /**
+     * Puts a key/value pair into the array, optimizing for the case where
+     * the key is greater than all existing keys in the array.
+     */
+    public void append(int key, E value) {
+        if (mSize != 0 && key <= mKeys[mSize - 1]) {
+            put(key, value);
+            return;
+        }
+
+        if (mGarbage && mSize >= mKeys.length) {
+            gc();
+        }
+
+        int pos = mSize;
+        if (pos >= mKeys.length) {
+            int n = idealIntArraySize(pos + 1);
+
+            int[] nkeys = new int[n];
+            Object[] nvalues = new Object[n];
+
+            // Log.e("SparseArray", "grow " + mKeys.length + " to " + n);
+            System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length);
+            System.arraycopy(mValues, 0, nvalues, 0, mValues.length);
+
+            mKeys = nkeys;
+            mValues = nvalues;
+        }
+
+        mKeys[pos] = key;
+        mValues[pos] = value;
+        mSize = pos + 1;
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * <p>This implementation composes a string by iterating over its mappings. If
+     * this map contains itself as a value, the string "(this Map)"
+     * will appear in its place.
+     */
+    @Override
+    public String toString() {
+        if (size() <= 0) {
+            return "{}";
+        }
+
+        StringBuilder buffer = new StringBuilder(mSize * 28);
+        buffer.append('{');
+        for (int i=0; i<mSize; i++) {
+            if (i > 0) {
+                buffer.append(", ");
+            }
+            int key = keyAt(i);
+            buffer.append(key);
+            buffer.append('=');
+            Object value = valueAt(i);
+            if (value != this) {
+                buffer.append(value);
+            } else {
+                buffer.append("(this Map)");
+            }
+        }
+        buffer.append('}');
+        return buffer.toString();
+    }
+
+    static int idealByteArraySize(int need) {
+        for (int i = 4; i < 32; i++)
+            if (need <= (1 << i) - 12)
+                return (1 << i) - 12;
+
+        return need;
+    }
+
+    static int idealBooleanArraySize(int need) {
+        return idealByteArraySize(need);
+    }
+
+    static int idealShortArraySize(int need) {
+        return idealByteArraySize(need * 2) / 2;
+    }
+
+    static int idealCharArraySize(int need) {
+        return idealByteArraySize(need * 2) / 2;
+    }
+
+    static int idealIntArraySize(int need) {
+        return idealByteArraySize(need * 4) / 4;
+    }
+
+    static int idealFloatArraySize(int need) {
+        return idealByteArraySize(need * 4) / 4;
+    }
+
+    static int idealObjectArraySize(int need) {
+        return idealByteArraySize(need * 4) / 4;
+    }
+
+    static int idealLongArraySize(int need) {
+        return idealByteArraySize(need * 8) / 8;
+    }
+
+    static class ContainerHelpers {
+        static final boolean[] EMPTY_BOOLEANS = new boolean[0];
+        static final int[] EMPTY_INTS = new int[0];
+        static final long[] EMPTY_LONGS = new long[0];
+        static final Object[] EMPTY_OBJECTS = new Object[0];
+
+        // This is Arrays.binarySearch(), but doesn't do any argument validation.
+        static int binarySearch(int[] array, int size, int value) {
+            int lo = 0;
+            int hi = size - 1;
+
+            while (lo <= hi) {
+                final int mid = (lo + hi) >>> 1;
+                final int midVal = array[mid];
+
+                if (midVal < value) {
+                    lo = mid + 1;
+                } else if (midVal > value) {
+                    hi = mid - 1;
+                } else {
+                    return mid;  // value found
+                }
+            }
+            return ~lo;  // value not present
+        }
+    }
+
+}

app/src/main/java/android/support/v7/widget/RecyclerViewAccessibilityDelegate.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.support.v7.widget;
+
+import android.os.Bundle;
+import android.support.v4.view.AccessibilityDelegateCompat;
+import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
+import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
+
+/**
+ * The AccessibilityDelegate used by RecyclerView.
+ * <p>
+ * This class handles basic accessibility actions and delegates them to LayoutManager.
+ */
+public class RecyclerViewAccessibilityDelegate extends AccessibilityDelegateCompat {
+    final RecyclerView mRecyclerView;
+
+
+    public RecyclerViewAccessibilityDelegate(RecyclerView recyclerView) {
+        mRecyclerView = recyclerView;
+    }
+
+    @Override
+    public boolean performAccessibilityAction(View host, int action, Bundle args) {
+        if (super.performAccessibilityAction(host, action, args)) {
+            return true;
+        }
+        if (mRecyclerView.getLayoutManager() != null) {
+            return mRecyclerView.getLayoutManager().performAccessibilityAction(action, args);
+        }
+
+        return false;
+    }
+
+    @Override
+    public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
+        super.onInitializeAccessibilityNodeInfo(host, info);
+        info.setClassName(RecyclerView.class.getName());
+        if (mRecyclerView.getLayoutManager() != null) {
+            mRecyclerView.getLayoutManager().onInitializeAccessibilityNodeInfo(info);
+        }
+    }
+
+    @Override
+    public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
+        super.onInitializeAccessibilityEvent(host, event);
+        event.setClassName(RecyclerView.class.getName());
+        if (host instanceof RecyclerView) {
+            RecyclerView rv = (RecyclerView) host;
+            if (rv.getLayoutManager() != null) {
+                rv.getLayoutManager().onInitializeAccessibilityEvent(event);
+            }
+        }
+    }
+
+    AccessibilityDelegateCompat getItemDelegate() {
+        return mItemDelegate;
+    }
+
+    final AccessibilityDelegateCompat mItemDelegate = new AccessibilityDelegateCompat() {
+        @Override
+        public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
+            super.onInitializeAccessibilityNodeInfo(host, info);
+            if (mRecyclerView.getLayoutManager() != null) {
+                mRecyclerView.getLayoutManager().
+                        onInitializeAccessibilityNodeInfoForItem(host, info);
+            }
+        }
+
+        @Override
+        public boolean performAccessibilityAction(View host, int action, Bundle args) {
+            if (super.performAccessibilityAction(host, action, args)) {
+                return true;
+            }
+            if (mRecyclerView.getLayoutManager() != null) {
+                return mRecyclerView.getLayoutManager().
+                        performAccessibilityActionForItem(host, action, args);
+            }
+            return false;
+        }
+    };
+}

app/src/main/java/android/support/v7/widget/ScrollbarHelper.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.support.v7.widget;
+
+import android.view.View;
+
+/**
+ * A helper class to do scroll offset calculations.
+ */
+class ScrollbarHelper {
+
+    /**
+     * @param startChild View closest to start of the list. (top or left)
+     * @param endChild   View closest to end of the list (bottom or right)
+     */
+    static int computeScrollOffset(RecyclerView.State state, OrientationHelper orientation,
+            View startChild, View endChild, RecyclerView.LayoutManager lm,
+            boolean smoothScrollbarEnabled, boolean reverseLayout) {
+        if (lm.getChildCount() == 0 || state.getItemCount() == 0 || startChild == null ||
+                endChild == null) {
+            return 0;
+        }
+        final int minPosition = Math.min(lm.getPosition(startChild), lm.getPosition(endChild));
+        final int maxPosition = Math.max(lm.getPosition(startChild), lm.getPosition(endChild));
+        final int itemsBefore = reverseLayout
+                ? Math.max(0, state.getItemCount() - maxPosition - 1)
+                : Math.max(0, minPosition - 1);
+        if (!smoothScrollbarEnabled) {
+            return itemsBefore;
+        }
+        final int laidOutArea = Math.abs(orientation.getDecoratedEnd(endChild) -
+                orientation.getDecoratedStart(startChild));
+        final int itemRange = Math.abs(lm.getPosition(startChild) - lm.getPosition(endChild)) + 1;
+        final float avgSizePerRow = (float) laidOutArea / itemRange;
+
+        return Math.round(itemsBefore * avgSizePerRow + (orientation.getStartAfterPadding()
+                - orientation.getDecoratedStart(startChild)));
+    }
+
+    /**
+     * @param startChild View closest to start of the list. (top or left)
+     * @param endChild   View closest to end of the list (bottom or right)
+     */
+    static int computeScrollExtent(RecyclerView.State state, OrientationHelper orientation,
+            View startChild, View endChild, RecyclerView.LayoutManager lm,
+            boolean smoothScrollbarEnabled) {
+        if (lm.getChildCount() == 0 || state.getItemCount() == 0 || startChild == null ||
+                endChild == null) {
+            return 0;
+        }
+        if (!smoothScrollbarEnabled) {
+            return Math.abs(lm.getPosition(startChild) - lm.getPosition(endChild)) + 1;
+        }
+        final int extend = orientation.getDecoratedEnd(endChild)
+                - orientation.getDecoratedStart(startChild);
+        return Math.min(orientation.getTotalSpace(), extend);
+    }
+
+    /**
+     * @param startChild View closest to start of the list. (top or left)
+     * @param endChild   View closest to end of the list (bottom or right)
+     */
+    static int computeScrollRange(RecyclerView.State state, OrientationHelper orientation,
+            View startChild, View endChild, RecyclerView.LayoutManager lm,
+            boolean smoothScrollbarEnabled) {
+        if (lm.getChildCount() == 0 || state.getItemCount() == 0 || startChild == null ||
+                endChild == null) {
+            return 0;
+        }
+        if (!smoothScrollbarEnabled) {
+            return state.getItemCount();
+        }
+        // smooth scrollbar enabled. try to estimate better.
+        final int laidOutArea = orientation.getDecoratedEnd(endChild) -
+                orientation.getDecoratedStart(startChild);
+        final int laidOutRange = Math.abs(lm.getPosition(startChild) - lm.getPosition(endChild))
+                + 1;
+        // estimate a size for full list.
+        return (int) ((float) laidOutArea / laidOutRange * state.getItemCount());
+    }
+}

app/src/main/java/com/android/volley/AuthFailureError.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.volley;
+
+import android.content.Intent;
+
+/**
+ * Error indicating that there was an authentication failure when performing a Request.
+ */
+@SuppressWarnings("serial")
+public class AuthFailureError extends VolleyError {
+    /** An intent that can be used to resolve this exception. (Brings up the password dialog.) */
+    private Intent mResolutionIntent;
+
+    public AuthFailureError() { }
+
+    public AuthFailureError(Intent intent) {
+        mResolutionIntent = intent;
+    }
+
+    public AuthFailureError(NetworkResponse response) {
+        super(response);
+    }
+
+    public AuthFailureError(String message) {
+        super(message);
+    }
+
+    public AuthFailureError(String message, Exception reason) {
+        super(message, reason);
+    }
+
+    public Intent getResolutionIntent() {
+        return mResolutionIntent;
+    }
+
+    @Override
+    public String getMessage() {
+        if (mResolutionIntent != null) {
+            return "User needs to (re)enter credentials.";
+        }
+        return super.getMessage();
+    }
+}

app/src/main/java/com/android/volley/Cache.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.volley;
+
+import java.util.Collections;
+import java.util.Map;
+
+/**
+ * An interface for a cache keyed by a String with a byte array as data.
+ */
+public interface Cache {
+    /**
+     * Retrieves an entry from the cache.
+     * @param key Cache key
+     * @return An {@link Entry} or null in the event of a cache miss
+     */
+    public Entry get(String key);
+
+    /**
+     * Adds or replaces an entry to the cache.
+     * @param key Cache key
+     * @param entry Data to store and metadata for cache coherency, TTL, etc.
+     */
+    public void put(String key, Entry entry);
+
+    /**
+     * Performs any potentially long-running actions needed to initialize the cache;
+     * will be called from a worker thread.
+     */
+    public void initialize();
+
+    /**
+     * Invalidates an entry in the cache.
+     * @param key Cache key
+     * @param fullExpire True to fully expire the entry, false to soft expire
+     */
+    public void invalidate(String key, boolean fullExpire);
+
+    /**
+     * Removes an entry from the cache.
+     * @param key Cache key
+     */
+    public void remove(String key);
+
+    /**
+     * Empties the cache.
+     */
+    public void clear();
+
+    /**
+     * Data and metadata for an entry returned by the cache.
+     */
+    public static class Entry {
+        /** The data returned from cache. */
+        public byte[] data;
+
+        /** ETag for cache coherency. */
+        public String etag;
+
+        /** Date of this response as reported by the server. */
+        public long serverDate;
+
+        /** TTL for this record. */
+        public long ttl;
+
+        /** Soft TTL for this record. */
+        public long softTtl;
+
+        /** Immutable response headers as received from server; must be non-null. */
+        public Map<String, String> responseHeaders = Collections.emptyMap();
+
+        /** True if the entry is expired. */
+        public boolean isExpired() {
+            return this.ttl < System.currentTimeMillis();
+        }
+
+        /** True if a refresh is needed from the original data source. */
+        public boolean refreshNeeded() {
+            return this.softTtl < System.currentTimeMillis();
+        }
+    }
+
+}