從活動和轉到標籤分檔返回時，Tabhost在android中返回null

Question

當我第一次打開應用程序時，我的標籤工作正常。當我回到片段頁面時，它會返回null。請幫幫我 ！我究竟做錯了什麼？這是我的代碼。

public class TabsFragmentPagerAdapter extends FragmentPagerAdapter { 

    private ArrayList<ShareWinLeaderBoardTabModel> mShareWinLeaderBoardTabModelList; 
    public TabsFragmentPagerAdapter(FragmentManager fragmentManager, ArrayList<ShareWinLeaderBoardTabModel> shareWinLeaderBoardTabModelList) { 
     super(fragmentManager); 
     mShareWinLeaderBoardTabModelList = shareWinLeaderBoardTabModelList; 
    } 

    @Override 
    public Fragment getItem(int position) { 
     /*ShareWinLeaderBoardTabModel model = Once that is donemShareWinLeaderBoardTabModelList.get(position); 
     return new ShareWinLeaderBoardListFragment(model);*/ 

     switch (position) { 
     case 0: 
      ShareWinLeaderBoardTabModel model = mShareWinLeaderBoardTabModelList.get(position); 
      return new ShareWinLeaderBoardListFragment(model); 
     case 1: 
      ShareWinLeaderBoardTabModel model1 = mShareWinLeaderBoardTabModelList.get(position); 
      return new ShareWinLeaderBoardListFragment(model1); 
     case 2: 
      ShareWinLeaderBoardTabModel model2 = mShareWinLeaderBoardTabModelList.get(position); 
      return new ShareWinLeaderBoardListFragment(model2); 
     case 3: 
      ShareWinLeaderBoardTabModel model3 = mShareWinLeaderBoardTabModelList.get(position); 
      return new ShareWinLeaderBoardListFragment(model3); 
     default: 
      return null; 
     } 
    } 

    @Override 
    public int getCount() { 
     return mShareWinLeaderBoardTabModelList.size(); 
    } 

} 

當我按回來時，標籤主機有一些問題。標籤正常，但它們顯示空白碎片。任何幫助？

圖片：

Answer 1

變化FragmentPagerAdapter到FragmentStatePagerAdapter