小编Gla*_*r89的帖子

我有FragmentPagerAdapter的问题.

我无法保存片段的状态,然后在片段中有视图.每当我使用左右滑动时,通过覆盖扩展FragmentPagerAdapter的静态类中的方法getItem(int position)来重新创建Fragment.

 public static class GraphicsCollectionPagerAdapter extends FragmentPagerAdapter {

    final int NUM_ITEMS = 3; // number of tabs

    public GraphicsCollectionPagerAdapter(FragmentManager fm) {

        super(fm);
        fragmentList = new AnalyzeFragmentPageListWithDate();
        fragment1 = new  AnalyzeFragmentPage1();
        fragment2 = new  AnalyzeFragmentPage2();
    }

    @Override
    public Fragment getItem(int position) {
        //Log.i(TAG, "getItem() -> New fragment at position " + position);


        switch (position) {

        case 0:         
            return fragmentList;
       case 1:
            return fragment1;
       case 2:
             return fragment2;
        }
        return null;
    }

    @Override
    public int getCount() {
         return 3;
    } …