问题是,当活动启动时,只有1个片段似乎正在工作(viewPager中位置0的片段).我试图在我的PagerAdapter中的第0位返回新的Fragment(),但是当我这样做时,它是第二个正在工作的片段. (通过工作我的意思是在左边显示列表,我仍然没有处理右边的细节片段)

这是一些代码

CustomPagerAdapter.java

public class CustomPagerAdapter extends FragmentPagerAdapter{

public CustomPagerAdapter(FragmentManager fm) {
    super(fm);
}
public CustomPagerAdapter(FragmentManager fm,Context context) {
    super(fm);

}

@Override   
public Fragment getItem(int pos) {

    if(pos == 4)
        return new OtherContainerFragment();
    else
        return new ContainerFragment(pos);

}

@Override
public int getCount() {

    return 5;
}

ContainerFragment.java

public class ContainerFragment extends Fragment {
private int CONTAINER_TYPE;

public ContainerFragment(){

}

public ContainerFragment(int type){
    CONTAINER_TYPE = type;
}



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


@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_container,container,false);
}

@Override
public void onViewCreated(View view,Bundle savedInstanceState) {
    super.onViewCreated(view,savedInstanceState);


    FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
    CustomListFragment frag = new CustomListFragment(CONTAINER_TYPE);

    ft.replace(R.id.replaceable_list,frag);

    ft.commit();

CustomListFragment.java

public class CustomListFragment extends SuperCustomListFragment{

private ArrayList<Model> mModels;
private int TYPE;


public CustomListFragment(){

}

public CustomListFragment(int type){
    TYPE = type;
}


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


@Override
public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {
    return super.onCreateView(inflater,savedInstanceState);
}


@Override
public void onViewCreated(View view,savedInstanceState);

    mModels = new ArrayList<Model>();


     if(TYPE == AppConstants.FRAGMENT_TYPE_JOURNAL){
        mAdapter = AppUtils.getJournalListAdapter(getActivity(),mModels);
        new syncPapers().execute();
     }else if(TYPE == AppConstants.FRAGMENT_TYPE_MOVIES){
         mAdapter = AppUtils.getMoviesListAdapter(getActivity(),mModels);
         new syncMovies().execute();
     }


    if(mAdapter != null)
        mListView.setAdapter(mAdapter);  //mListView is defined in the superClass

以下是我使用的常量：

public class AppConstants {


public static final int FRAGMENT_TYPE_AGENDA = 0; //so Fragment at position 0 should be of type agenda
public static final int FRAGMENT_TYPE_NEWS = 1; // position 1 should be of type news
public static final int FRAGMENT_TYPE_MOVIES = 2; // ...
public static final int FRAGMENT_TYPE_JOURNAL = 3; // ...

}

和容器的xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >

<LinearLayout
    android:id="@+id/replaceable_list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</LinearLayout>

<LinearLayout
    android:id="@+id/replaceable_details"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:background="@drawable/background" >
</LinearLayout>

</LinearLayout>

因此,这段代码不起作用,似乎片段容器左侧的列表在每个片段中被替换,只有位置0的片段显示它. (目前它显示带有“JOURNAL”类型的适配器的列表,但它应显示“AGENDA”类型的列表.

——————–
*但是…… *
——————–

如果我创建不同的fragment_container布局文件,并在ContainerFragment.java中的onCreateView和onViewCreated中编写IF条件,一切正常.
所以：

ContainerFragment.java

@Override
public View onCreateView(LayoutInflater inflater,Bundle      savedInstanceState) {
if(CONTAINER_TYPE == AppConstants.FRAGMENT_TYPE_JOURNAL)
    return inflater.inflate(R.layout.fragment_container_journal,false);
else if(CONTAINER_TYPE == AppConstants.FRAGMENT_TYPE_MOVIES)
    return inflater.inflater(R.layout.fragment_container_movies,false);
else
    return super.onCreateView(LayoutInflater inflater,Bundle      savedInstanceState);
}


@Override
public void onViewCreated(View view,savedInstanceState);


    FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
    CustomListFragment frag = new CustomListFragment(CONTAINER_TYPE);

    if(CONTAINER_TYPE == AppConstants.FRAGMENT_TYPE_JOURNAL)
        ft.replace(R.id.replaceable_journal_list,frag);
    else if(CONTAINER_TYPE == AppConstants.FRAGMENT_TYPE_MOVIES)
        ft.replace(R.id.replaceable_movies_list,frag);
    else 
        return;

    ft.commit();

我想这是因为在每个片段中,我替换了相同ID的LinearLayout？ (replaceable_list)
我认为可以为每个片段共享相同的布局文件,并且不想创建4个相同的布局文件.但看起来我必须这样做？
或者我在这里遗漏了什么？

感谢您的时间,