当父片段替换其他片段时，内容不会在选项卡布局片段中加载

Question

我有一个MainActivIty，它支持两个片段，即Home和Profile。Home具有一个TabLayout，而TabLayout依次具有趋势，关注和附近三个片段。因此，问题在于，首次加载Home时，它会显示Tab片段的内容，并且Tab布局的滑块会正确移动，但是当我进行剖析然后回到home时，则不会加载Tab布局的片段，而从左向右滑动不能平稳移动这里是代码

public class MainActivity extends AppCompatActivity {

 ImageButton home_btn,myProfile_btn;
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
TextView txt_action_bar;
Home home;
ProfileFragment profile;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    home_btn=(ImageButton)findViewById(R.id.home_btn) ;
    discover_btn=(ImageButton)findViewById(R.id.discover_btn) ;
    myProfile_btn=(ImageButton)findViewById(R.id.profile_btn) ;
    notification_btn=(ImageButton)findViewById(R.id.notification_btn) ;
    plus_btn=(ImageButton)findViewById(R.id.btn_plus) ;

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
     txt_action_bar = (TextView)findViewById(R.id.toolbar_title);
    displayMetrics = getResources().getDisplayMetrics();
    Typeface custom_font = Typeface.createFromAsset(getAssets(),"fonts/NoteworthyLight.ttf");
    txt_action_bar.setTypeface(custom_font);


    setSupportActionBar(toolbar);
     fragmentManager = getSupportFragmentManager();
    fragmentTransaction = fragmentManager.beginTransaction();
     home = new Home();
     profile = new ProfileFragment();
    fragmentTransaction.add(R.id.main_fragment_container,home,"home");
    fragmentTransaction.commit();


}

public void onClickHome(View view)
{


    fragmentManager = getSupportFragmentManager();
    fragmentTransaction = fragmentManager.beginTransaction();

    fragmentTransaction.replace(R.id.main_fragment_container,home,"home");
    fragmentTransaction.commit();
}

public void onClickMyProfile(View view)
{

    fragmentManager = getSupportFragmentManager();
    fragmentTransaction = fragmentManager.beginTransaction();

    fragmentTransaction.replace(R.id.main_fragment_container,profile,"profile");

   fragmentTransaction.commit();
}

}

家.java

public class Home extends Fragment {


private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;

public Home() {
    // Required empty public constructor
}



@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

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

    mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
    mViewPager = (ViewPager) view.findViewById(R.id.container);
    mViewPager.setAdapter(mSectionsPagerAdapter);
    TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(mViewPager);
    return view;
}

FollowedFragment.java

public class FollowedFragment extends Fragment {


public FollowedFragment() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    final View rootView = inflater.inflate(R.layout.feeds_list, container, false);
    new DownloadFollowedFeeds().execute();
    return rootView;
}

fragment_home.xml

<LinearLayout android:layout_below="@+id/header"
android:layout_above="@+id/footer"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_gravity="center_vertical"
android:orientation="vertical"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<android.support.design.widget.TabLayout
    android:id="@+id/tabs"
    style="@style/TabNameStyle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/medium_turquoise"
    app:tabGravity="fill"
    app:tabMode="fixed" />

<android.support.v4.view.ViewPager
    android:id="@+id/container"
    android:layout_width="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:layout_height="fill_parent"/>

SectionPagerAdapter.java

public class SectionsPagerAdapter extends FragmentPagerAdapter {

private String tabTitles[] = new String[] { "Trending", "Followed","Nearby" };


public SectionsPagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    // getItem is called to instantiate the fragment for the given page.
    // Return a PlaceholderFragment (defined as a static inner class below).
    Log.i("tag","number"+String.valueOf(position));
    if(position==0)  return  new TrendingFragment();
    else if(position==1)    return new FollowedFragment();
    else return new NearbyFragment();
}

@Override
public int getCount() {
    // Show 3 total pages.
    return 3;
}

@Override
public CharSequence getPageTitle(int position) {
    return tabTitles[position];
}

}

Answer 1

如这里回答：

在以下位置创建视图适配器时Home.java：

代替

mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());

你应该做，

mSectionsPagerAdapter = new SectionsPagerAdapter(getChildFragmentManager());