为什么调用 FragmentPagerAdapter.notifyDataSetChanged() 并不能更新其 Fragment

http://stackoverflow.com/questions/10849552/update-viewpager-dynamically

if you want to switch out the actual fragments that are being displayed, you need to avoid FragmentPagerAdapter and use FragmentStatePagerAdapter.

ViewPager pager = /* get my ViewPager */; // assume this actually has stuff in it final ArrayList<String> titles = new ArrayList<String>(); FragmentManager fm = getSupportFragmentManager(); pager.setAdapter(new FragmentStatePagerAdapter(fm) { public int getCount() { return titles.size(); } public Fragment getItem(int position) { MyFragment fragment = new MyFragment(); fragment.setTitle(titles.get(position)); return fragment; } public int getItemPosition(Object item) { MyFragment fragment = (MyFragment)item; String title = fragment.getTitle(); int position = titles.indexOf(title); if (position >= 0) { return position; } else { return POSITION_NONE; } } });