Android Viewpager不会膨胀已经膨胀了另一个Viewpager的碎片

我有一个项目，需要有两个viewpager，每个都在不同的活动片段中

架构是这样的

问题是，当一个寻呼机视图被放大时，另一个视图却没有

例如，可以通过单击访问片段1、2和3。当我点击第一个片段时，它会用它的两个片段完美地膨胀视图寻呼机，但是如果我点击片段3，视图寻呼机不会膨胀片段，选项卡也会变慢。 再次打开应用程序进程，首先单击片段3，它工作得很好，但是单击之后的第一个，这个问题再次发生

已经调试了流程，没有什么不同

我的活动

public class HomeActivity extends AppCompatActivity implements NavigationFragment.OnNavigationListener{
public NavigationFragment mNavigation;

private String mTagFragmentShowing = "";
private int currentNavigation = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
    ButterKnife.bind(this);
    mNavigation = (NavigationFragment) getFragmentManager().findFragmentById(R.id.manager_navigation);

    onNavigationSelected(currentNavigation);
}


@Override
public void onNavigationSelected(int position) {
    if (mTagFragmentShowing.equals(String.valueOf(position)))
        return;

    currentNavigation = position;

    mNavigation.setNavigationSelected(position);
    FragmentManager fragmentManager = getSupportFragmentManager();
    Fragment fragment = fragmentManager.findFragmentByTag(mTagFragmentShowing);

    // Hide last fragment
    if (fragment != null && fragment.isVisible()) {
        fragmentManager.beginTransaction().hide(fragment).commit();
    }

    // Show new fragment
    mTagFragmentShowing = String.valueOf(position);
    fragment = fragmentManager.findFragmentByTag(mTagFragmentShowing);

    if (fragment != null && fragment.isHidden()) {
        fragmentManager.beginTransaction().show(fragment).commit();
    } else if (fragment == null) {
        fragmentManager.beginTransaction().add(R.id.manager_content, getFragmentByPosition(position), mTagFragmentShowing)
                .setTransition(FragmentTransaction.TRANSIT_NONE).commit();
    }
}

private Fragment getFragmentByPosition(int position) {
    switch (position) {
        case 0:
            return new DiscoverFragment();
        case 1:
            return new UpcomingFragment();
        case 2:
            return new FeaturesFragment();
        case 3:
            return new VideosFragment();
        case 4:
            return new MySongsFragment();
    }
    return null;
}

我的导航片段。它控制着其他的碎片

public class NavigationFragment extends Fragment implements View.OnClickListener {

public ViewHolder mHolder;
public View mButtonSelected;
public OnNavigationListener mCallback;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.component_navigation, container, false);
    ButterKnife.bind(this, view);

    initView(view);
    return view;
}

public void initView(View view) {
    mHolder = new ViewHolder();
    mHolder.discover = view.findViewById(R.id.component_navigation_discover);
    mHolder.upcoming = view.findViewById(R.id.component_navigation_upcoming);
    mHolder.features = view.findViewById(R.id.component_navigation_features);
    mHolder.videos = view.findViewById(R.id.component_navigation_videos);
    mHolder.mymusic = view.findViewById(R.id.component_navigation_mymusic);

    mHolder.discover.setTag(0);
    mHolder.upcoming.setTag(1);
    mHolder.features.setTag(2);
    mHolder.videos.setTag(3);
    mHolder.mymusic.setTag(4);

    mHolder.discover.setOnClickListener(this);
    mHolder.upcoming.setOnClickListener(this);
    mHolder.features.setOnClickListener(this);
    mHolder.videos.setOnClickListener(this);
    mHolder.mymusic.setOnClickListener(this);
    mButtonSelected = mHolder.features;
}

public void setNavigationSelected(int position) {
    setNavigationButtonSelected(false);
    switch (position) {
        case 0:
            mButtonSelected = mHolder.discover;
            break;
        case 1:
            mButtonSelected = mHolder.upcoming;
            break;
        case 2:
            mButtonSelected = mHolder.features;
            break;
        case 3:
            mButtonSelected = mHolder.videos;
            break;
        case 4:
            mButtonSelected = mHolder.mymusic;
            break;
    }
    setNavigationButtonSelected(true);
}

public void setNavigationButtonSelected(boolean enabled) {
    mButtonSelected.setBackgroundColor(enabled ? getResources().getColor(R.color.color_red) : Color.TRANSPARENT);
}

@Override
public void onClick(View view) {
    if (view != mButtonSelected) {
        mCallback.onNavigationSelected((Integer) view.getTag());
    }
}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);

    try {
        mCallback = (OnNavigationListener) activity;
    } catch (ClassCastException e) {
        throw new ClassCastException(activity.toString()
                + " must implement OnNavigationSelectedListener");
    }
}

@Override
public void onDetach() {
    super.onDetach();
    mCallback = null;
}

static class ViewHolder {
    View discover;
    View upcoming;
    View features;
    View videos;
    View mymusic;
}

public interface OnNavigationListener {
    public void onNavigationSelected(int position);
}

我的片段与查看寻呼机

public class MySongsFragment extends Fragment {
private OnFragmentInteractionListener mListener;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    getActivity().getSupportFragmentManager().beginTransaction().add(R.id.mysongs_fragment_container, MySongsViewPagerFragment.newInstance(0)).commit();

    return inflater.inflate(R.layout.fragment_my_songs, container, false);
}


@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}

/**
 * This interface must be implemented by activities that contain this
 * fragment to allow an interaction in this fragment to be communicated
 * to the activity and potentially other fragments contained in that
 * activity.
 * <p/>
 * See the Android Training lesson <a href=
 * "http://developer.android.com/training/basics/fragments/communicating.html"
 * >Communicating with Other Fragments</a> for more information.
 */
public interface OnFragmentInteractionListener {
    // TODO: Update argument type and name
    public void onFragmentInteraction(Uri uri);
}

public class MySongsViewPagerFragment extends Fragment {

private static final int NUM_PAGES = 4;
private String[] tab_names;
private List<String> mTabNames;
private PagerAdapter mPagerAdapter;

public @Bind(R.id.pager)
ViewPager mPager;

public static MySongsViewPagerFragment newInstance(int index) {
    MySongsViewPagerFragment fragment = new MySongsViewPagerFragment();
    Bundle args = new Bundle();
    args.putInt("index", index);
    fragment.setArguments(args);
    return fragment;
}

@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = initView(inflater, container);
    return view;
}

@NonNull private View initView(LayoutInflater inflater, ViewGroup container) {
    View view = inflater.inflate(R.layout.fragment_view_pager_my_songs, container, false);
    ButterKnife.bind(this, view);

    tab_names = getResources().getStringArray(R.array.tabs_mysongs);
    mTabNames = Arrays.asList(tab_names);

    mPagerAdapter = new ScreenSlidePagerAdapter(getActivity().getSupportFragmentManager());
    mPager.setAdapter(mPagerAdapter);

    mPager.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            mPager.onTouchEvent(event);
            return false;
        }
    });

    TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(mPager);
    return view;
}



private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
    public ScreenSlidePagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override public Fragment getItem(int position) {
        switch (position) {
            case 0:
                return new PlaylistsFragment();
            case 1:
                return new SongsFragment();
            case 2:
                return new AlbumsFragment();
            case 3:
                return new ArtistsFragment();
            default:
                return new PlaylistsFragment();
        }
    }

    @Override public int getCount() {
        return NUM_PAGES;
    }

    @Override public CharSequence getPageTitle(int position) {
        return mTabNames.get(position);
    }
}

公共类MySongsFragment扩展了片段{
私有OnFragmentInteractionListener mListener；
@凌驾
创建视图上的公共视图（布局、充气机、视图组容器、，
Bundle savedInstanceState）{
getActivity（）.getSupportFragmentManager（）.beginTransaction（）.add（R.id.mysongs_fragment_容器，MySongsViewPagerFragment.newInstance（0））.commit（）；
返回充气机。充气（R.layout.fragment\u my\u songs，容器，false）；
}
@凌驾
公共无效连接（）{
super.onDetach（）；
mListener=null；
}
/**
*此接口必须由包含以下内容的活动实现
*片段，以允许通信此片段中的交互
*该活动以及其中可能包含的其他片段
*活动。
*

*有关更多信息，请参阅Android培训课程。
*/
FragmentInteractionListener上的公共接口{
//TODO:更新参数类型和名称
公共void onFragmentInteraction（Uri）；
}

我的视图寻呼机

public class MySongsFragment extends Fragment {
private OnFragmentInteractionListener mListener;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    getActivity().getSupportFragmentManager().beginTransaction().add(R.id.mysongs_fragment_container, MySongsViewPagerFragment.newInstance(0)).commit();

    return inflater.inflate(R.layout.fragment_my_songs, container, false);
}


@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}

/**
 * This interface must be implemented by activities that contain this
 * fragment to allow an interaction in this fragment to be communicated
 * to the activity and potentially other fragments contained in that
 * activity.
 * <p/>
 * See the Android Training lesson <a href=
 * "http://developer.android.com/training/basics/fragments/communicating.html"
 * >Communicating with Other Fragments</a> for more information.
 */
public interface OnFragmentInteractionListener {
    // TODO: Update argument type and name
    public void onFragmentInteraction(Uri uri);
}

public class MySongsViewPagerFragment extends Fragment {

private static final int NUM_PAGES = 4;
private String[] tab_names;
private List<String> mTabNames;
private PagerAdapter mPagerAdapter;

public @Bind(R.id.pager)
ViewPager mPager;

public static MySongsViewPagerFragment newInstance(int index) {
    MySongsViewPagerFragment fragment = new MySongsViewPagerFragment();
    Bundle args = new Bundle();
    args.putInt("index", index);
    fragment.setArguments(args);
    return fragment;
}

@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = initView(inflater, container);
    return view;
}

@NonNull private View initView(LayoutInflater inflater, ViewGroup container) {
    View view = inflater.inflate(R.layout.fragment_view_pager_my_songs, container, false);
    ButterKnife.bind(this, view);

    tab_names = getResources().getStringArray(R.array.tabs_mysongs);
    mTabNames = Arrays.asList(tab_names);

    mPagerAdapter = new ScreenSlidePagerAdapter(getActivity().getSupportFragmentManager());
    mPager.setAdapter(mPagerAdapter);

    mPager.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            mPager.onTouchEvent(event);
            return false;
        }
    });

    TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(mPager);
    return view;
}



private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
    public ScreenSlidePagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override public Fragment getItem(int position) {
        switch (position) {
            case 0:
                return new PlaylistsFragment();
            case 1:
                return new SongsFragment();
            case 2:
                return new AlbumsFragment();
            case 3:
                return new ArtistsFragment();
            default:
                return new PlaylistsFragment();
        }
    }

    @Override public int getCount() {
        return NUM_PAGES;
    }

    @Override public CharSequence getPageTitle(int position) {
        return mTabNames.get(position);
    }
}

公共类MySongsViewPagerFragment扩展了片段{
私有静态最终int NUM_PAGES=4；
私有字符串[]选项卡名称；
私人名单mTabNames；
私人寻呼器；
public@Bind（R.id.pager）
可视寻呼机；
公共静态MySongsViewPagerFragment newInstance（int索引）{
MySongsViewPagerFragment=新的MySongsViewPagerFragment（）；
Bundle args=新Bundle（）；
参数putInt（“索引”，索引）；
fragment.setArguments（args）；
返回片段；
}
@覆盖CreateView上的公共视图（布局、充气机、视图组容器、捆绑包保存状态）{
视图=初始视图（充气机、容器）；
返回视图；
}
@非Null私有视图initView（LayoutFlater充气机、视图组容器）{
视图=充气机。充气（R.layout.fragment\u View\u pager\u my\u songs，container，false）；
ButterKnife.bind（这个，视图）；
tab_name=getResources（）.getStringArray（R.array.tabs_mysongs）；
mTabNames=Arrays.asList（选项卡名称）；
mPagerAdapter=newscreensilepageradapter（getActivity（）.getSupportFragmentManager（））；
mPager.setAdapter（mPagerAdapter）；
mPager.setOnTouchListener（新视图.OnTouchListener（）{
@凌驾
公共布尔onTouch（视图v，运动事件）{
mPager.onTouchEvent（事件）；
返回false；
}
});
TabLayout TabLayout=（TabLayout）view.findViewById（R.id.tabs）；
tabLayout.setupWithViewPager（mPager）；
返回视图；
}
私有类ScreenSlidePagerAdapter扩展FragmentStatePagerAdapter{
公共屏幕SlidePagerAdapter（FragmentManager fm）{
超级（fm）；
}
@重写公共片段getItem（int位置）{
开关（位置）{
案例0：
返回新播放列表片段（）；
案例1：
返回新歌曲片段（）；
案例2：
返回新相册片段（）；
案例3：
返回新的ArtistsFragment（）；
违约：
返回新播放列表片段（）；
}
}
@重写公共int getCount（）{
返回NUM_页；
}
@重写公共字符序列getPageTitle（int位置）{
返回mTabNames.get（位置）；
}
}

问题是viewpager中的活动上下文

在我的视图中，我更改了寻呼机

mPagerAdapter = new ScreenSlidePagerAdapter(getActivity().getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);

到

两个viewpager使用相同的上下文。因此，当我膨胀第一个时，另一个没有膨胀，因为已经存在膨胀的viewpager

---

感谢mcwise的帮助，向我展示了getChildFragmentManager（）方法。

这里有一些代码会很有帮助。最好能提取一个。一件事，如果你使用嵌套片段，你应该使用host fragments getChildFragmentManager（）方法，而不是getSupportFragmentManager（）您还可以查看我在何处解释如何在“查看寻呼机”选项卡中嵌入片段，也许这对您很有用。在类似的主题中，它也确实帮助了我。做得很好。片段的开销很大，最初很难进行设置（反正它们都是为我准备的）。我是为使用多个“查看寻呼机”而预订的。@KJEjava48 getChildFragmentManager（）是Android片段类的公共方法。