android–Viewpager不会对已经为另一个视图寻呼机充气的片段进行充气

概述我有一个项目需要有两个viewpager,每个都在活动的不同片段中.这样的架构是这样的问题是当寻呼机视图膨胀时,另一个不是.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,它会完美地展开视图寻呼机及其两个片段,但是如果我点击片段3,则视图寻呼机不会使片段膨胀,而且标签

我有一个项目需要有两个vIEwpager,每个都在活动的不同片段中.

这样的架构是这样的

问题是当寻呼机视图膨胀时,另一个不是.

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,它会完美地展开视图寻呼机及其两个片段,但是如果我点击片段3,则视图寻呼机不会使片段膨胀,而且标签也会变慢.
再次打开应用程序进程,首先单击片段3,它可以正常工作,但点击后面的第一个,这个问题再次发生.

已经调试过程并没有什么不同.

我的活动

public class HomeActivity extends AppCompatActivity implements NavigationFragment.OnNavigationListener{public NavigationFragment mNavigation;private String mTagFragmentShowing = "";private int currentNavigation = 0;@OverrIDeprotected 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);}@OverrIDepublic 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.它控制其他片段

public class NavigationFragment extends Fragment implements VIEw.OnClickListener {public VIEwHolder mHolder;public VIEw mbuttonSelected;public OnNavigationListener mCallback;@OverrIDepublic 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);}@OverrIDepublic voID onClick(VIEw vIEw) {    if (vIEw != mbuttonSelected) {        mCallback.onNavigationSelected((Integer) vIEw.getTag());    }}@OverrIDepublic voID onAttach(Activity activity) {    super.onAttach(activity);    try {        mCallback = (OnNavigationListener) activity;    } catch (ClassCastException e) {        throw new ClassCastException(activity.toString()                + " must implement OnNavigationSelectedListener");    }}@OverrIDepublic 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);}

我的片段与视图寻呼机

public class MySongsFragment extends Fragment {private OnFragmentInteractionListener mListener;@OverrIDepublic 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);}@OverrIDepublic 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);}

我的观点寻呼机

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);    }}

解决方法:

问题是vIEwpager中的活动上下文

在我的视图中寻呼机.我改变

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

至

mPagerAdapter = new ScreenSlIDePagerAdapter(getChildFragmentManager());mPager.setAdapter(mPagerAdapter);

两个vIEwpager使用相同的上下文.因此,当我第一次膨胀时,另一个没有膨胀,因为解释已经存在一个膨胀的vIEwpager.

感谢mcwise帮助向我展示方法getChildFragmentManager().

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