assistant-android/app/src/main/java/com/gh/gamecenter/libao/Libao1Fragment.java

package com.gh.gamecenter.libao;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.AppBarLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.SwipeRefreshLayout;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.TextView;

import com.gh.base.fragment.BaseFragment;
import com.gh.gamecenter.R;
import com.gh.gamecenter.eventbus.EBReuse;

import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import java.util.List;

import butterknife.BindView;
import butterknife.OnClick;

import static com.gh.gamecenter.LibaoActivity.LIBAO_CLOSEPAGE;
import static com.gh.gamecenter.LibaoActivity.LIBAO_OPENPAGE;

/**
 * Created by khy on 5/09/17.
 */

public class Libao1Fragment extends BaseFragment implements SwipeRefreshLayout.OnRefreshListener {

    @BindView(R.id.libao_appbar)
    AppBarLayout mAppBar;
    @BindView(R.id.libao_refresh)
    SwipeRefreshLayout mRefreshLayout;
    @BindView(R.id.libao_et_search)
    EditText mLibaoEtSearch;
    @BindView(R.id.libao_tv_back)
    TextView mLibaoTvBack;
    @BindView(R.id.libao_tv_search)
    TextView mLibaoTvSearch;

    public final static String OPEN_LIBAO_APPBAR = "open_libao_appbar";

    private LibaoSearchFragment mSearchFragment;
    private LibaoNewFragment mNewFragment;

    private boolean mIsSearch;
    private boolean mIsTouchScreen;

    @Override
    protected int getLayoutId() {
        return R.layout.fragment_libao1;
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mRefreshLayout.setColorSchemeResources(R.color.theme);
        mRefreshLayout.setOnRefreshListener(this);
        mRefreshLayout.setEnabled(false);

        changeFragment();

        mAppBar.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
            @Override
            public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
                if (verticalOffset == 0) {
                    mRefreshLayout.setEnabled(true);
                } else {
                    mRefreshLayout.setEnabled(false);
                }
                int totalScrollRange = appBarLayout.getTotalScrollRange();
                if (totalScrollRange == -verticalOffset) {
                    InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(getActivity().getWindow().getDecorView().getWindowToken(), 0);
                }
            }
        });

        mLibaoEtSearch.setOnEditorActionListener(new TextView.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                if (actionId == EditorInfo.IME_ACTION_SEARCH) {
                    mLibaoTvSearch.performClick();
                }
                return false;
            }
        });
    }

    public void onTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mIsTouchScreen = true;
                break;
            case MotionEvent.ACTION_UP:
                mIsTouchScreen = false;
                break;
        }
    }

    private void changeFragment() {
        FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
        hideFragments(transaction);
        if (mIsSearch) {
            mSearchFragment = alterFragment(transaction, LibaoSearchFragment.class);
        } else {
            mNewFragment = alterFragment(transaction, LibaoNewFragment.class);
        }

        transaction.commit();
    }

    // 将所有的Fragment都置为隐藏状态。
    private void hideFragments(FragmentTransaction transaction) {
        List<Fragment> list = getChildFragmentManager().getFragments();
        if (list != null) {
            for (Fragment fragment : list) {
                transaction.hide(fragment);
            }
        }
    }

    private <T extends Fragment> T alterFragment(FragmentTransaction transaction, Class<T> cls) {
        T fragmentByTag = (T) getChildFragmentManager().findFragmentByTag(cls.getSimpleName());
        try {
            if (fragmentByTag != null) {
                transaction.show(fragmentByTag);
                if (fragmentByTag instanceof LibaoSearchFragment) {
                    ((LibaoSearchFragment) fragmentByTag).search();
                }
            } else {
                fragmentByTag = cls.newInstance();
                transaction.add(R.id.layout_fragment_content, fragmentByTag, cls.getSimpleName());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return fragmentByTag;
    }

    @OnClick({R.id.libao_tv_back, R.id.libao_tv_search})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.libao_tv_back:
                mIsSearch = false;
                break;
            case R.id.libao_tv_search:
                String key = mLibaoEtSearch.getText().toString();
                if (TextUtils.isEmpty(key)) {
                    toast(getString(R.string.search_hint));
                    return;
                } else if (!mIsSearch) {
                    mIsSearch = true;
                }
                break;
        }
        if (mIsSearch) {
            mLibaoTvBack.setVisibility(View.VISIBLE);
        } else {
            mLibaoTvBack.setVisibility(View.GONE);
        }
        InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(getActivity().getWindow().getDecorView().getWindowToken(), 0);
        changeFragment();
    }

    public String getSearchKey() {
        return mLibaoEtSearch.getText().toString();
    }

    @Override
    public void onRefresh() {
        if (mIsSearch) {
            mSearchFragment.onRefresh();
        } else {
            mNewFragment.onRefresh();
        }
    }

    public void colseRefresh() {
        mRefreshLayout.setRefreshing(false);
    }

    // 页面切换事件（查看历史礼包的页面）
    @Subscribe(threadMode = ThreadMode.MAIN)
    public void onEventMainThread(EBReuse reuse) {
        if (LIBAO_OPENPAGE.equals(reuse.getType())) {
            mAppBar.setVisibility(View.GONE);
            mRefreshLayout.setEnabled(false);
        } else if (LIBAO_CLOSEPAGE.equals(reuse.getType())) {
            mAppBar.setVisibility(View.VISIBLE);
            mRefreshLayout.setEnabled(true);
        } else if (OPEN_LIBAO_APPBAR.equals(reuse.getType()) && !mIsTouchScreen) {
            mAppBar.setExpanded(true, true);
        }
    }

}