assistant-android/app/src/main/java/com/gh/gamecenter/KcSelectGameActivity.java

package com.gh.gamecenter;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.gh.base.AppController;
import com.gh.base.BaseActivity;
import com.gh.common.util.DisplayUtils;
import com.gh.common.util.Utils;
import com.gh.common.view.VerticalItemDecoration;
import com.gh.gamecenter.adapter.KcSelectGameAdapter;
import com.gh.gamecenter.kuaichuan.FileInfo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import butterknife.BindView;

/**
 * Created by khy on 2017/1/20.
 * 快传-选择游戏
 */
public class KcSelectGameActivity extends BaseActivity {

    @BindView(R.id.select_game_rv)
    RecyclerView mSelectRv;
    @BindView(R.id.select_game_send)
    TextView mSelectSend;
    @BindView(R.id.select_game_all)
    CheckBox selectAll;
    @BindView(R.id.install_count)
    TextView installCount;
    @BindView(R.id.select_game_installed_ll)
    RelativeLayout installRl;
    @BindView(R.id.select_game_pb)
    ProgressBar mSelectPb;

    private KcSelectGameAdapter mAdapter;

    private boolean mIsConn;
    private LinearLayoutManager layoutManager;
    private RelativeLayout.LayoutParams rparams;

    @NonNull
    public static Intent getIntent(Context context, boolean isConn) {
        Intent intent = new Intent(context, KcSelectGameActivity.class);
        intent.putExtra("isConn", isConn);
        return intent;
    }

    @Override
    protected int getLayoutId() {
        return R.layout.activity_kc_select_game;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 0x123) {
            if (data != null && data.getExtras() != null && data.getExtras().getBoolean("isFinish")) {
                finish();
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initTitle(getString(R.string.title_select_game));

        if (getIntent() != null && getIntent().getExtras() != null) {
            mIsConn = getIntent().getExtras().getBoolean("isConn");
        } else {
            mIsConn = false;
        }

        selectAll.setVisibility(View.GONE);

        mAdapter = new KcSelectGameAdapter(this, mSelectSend, installCount, mSelectPb);
        layoutManager = new LinearLayoutManager(this);
        mSelectRv.setLayoutManager(layoutManager);
        mSelectRv.addItemDecoration(new VerticalItemDecoration(this, 8, false));
        mSelectRv.setAdapter(mAdapter);

        rparams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                DisplayUtils.dip2px(this, 40));

        mSelectSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                List<FileInfo> selectData = mAdapter.getSelectData();
                if (selectData.size() == 0) {
                    Utils.toast(KcSelectGameActivity.this, "请选择要发送的游戏");
                    return;
                }

                if (mIsConn) {
                    List<FileInfo> oldInfo = (List<FileInfo>) AppController.get("FileInfo", false);
                    if (oldInfo == null) {
                        oldInfo = new ArrayList<>();
                    }
                    for (FileInfo fileInfo : selectData) {
                        oldInfo.add(fileInfo);
                    }
                    setResult(0x130);
                    finish();
                } else {
                    AppController.put("FileInfo", selectData);
                    startActivityForResult(ChooseReceiverActivity.getIntent(KcSelectGameActivity.this, false), 0x123);
                }

            }
        });

        selectAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                HashMap<Integer, Boolean> selectPosition = new HashMap<>();
                int itemCount = mAdapter.getItemCount();
                if (isChecked) {
                    for (int i = 0; i < itemCount; i++) {
                        selectPosition.put(i, true);
                    }
                } else {
                    for (int i = 0; i < itemCount; i++) {
                        selectPosition.put(i, false);
                    }
                }

                mAdapter.setSelectPosition(selectPosition);
                mAdapter.notifyItemRangeChanged(0, itemCount);
            }
        });

        mSelectRv.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                if (dy == 0) return;

                int position = layoutManager.findFirstVisibleItemPosition();
                int gameSize = mAdapter.getGameSize();

                if (gameSize == 0) { // 游戏列表为空
                    if (position == gameSize) {
                        int buttom = layoutManager.findViewByPosition(position).getBottom();
                        int i = installRl.getHeight() + DisplayUtils.dip2px(KcSelectGameActivity.this, 43);
                        if (buttom <= i && i / 2 < buttom) {
                            rparams.topMargin = buttom - installRl.getHeight() - DisplayUtils.dip2px(KcSelectGameActivity.this, 43);
                            installRl.setLayoutParams(rparams);
                            installCount.setText("已安装的游戏（" + gameSize + "）");
                        } else {
                            installCount.setText("已安装的应用（" + mAdapter.getAppSize() + "）");
                            rparams.topMargin = 0;
                            installRl.setLayoutParams(rparams);
                        }
                    } else {
                        installCount.setText("已安装的应用（" + mAdapter.getAppSize() + "）");
                        rparams.topMargin = 0;
                        installRl.setLayoutParams(rparams);
                    }
                } else {
                    if (position >= gameSize) {
                        installCount.setText("已安装的应用（" + mAdapter.getAppSize() + "）");
                    } else {
                        installCount.setText("已安装的游戏（" + mAdapter.getGameSize() + "）");
                    }

                    if (position == gameSize - 1) {
                        int buttom = layoutManager.findViewByPosition(position).getBottom();
                        if (buttom <= installRl.getHeight()) {
                            rparams.topMargin = buttom - installRl.getHeight();
                            installRl.setLayoutParams(rparams);
                        } else {
                            rparams.topMargin = 0;
                            installRl.setLayoutParams(rparams);
                        }
                    } else {
                        rparams.topMargin = 0;
                        installRl.setLayoutParams(rparams);
                    }
                }

            }
        });

    }
}