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copied!<p><strong>Update:</strong> The problem that you described in comment is real, I missed it in first testing. After analyzing the source code of <code>FragmentPagerAdapter</code> I realized that all we need to do is to <strong>Override <code>getItemId()</code></strong> in a way that it won't return same id for different fragment items. E.g. current default implementation would just return position as an id for fragment which won't work for this case:</p> <pre><code> public long getItemId(int position) { return position; } </code></pre> <p>I am updating this answer, please have a look. As before I have tested this code and the problem you described is not happening now.</p> <hr> <p>Only thing you need is <strong>not</strong> to keep reference of fragments by yourself in <code>List</code>, This is done for you by <code>FragmentPagerAdapter</code>. And as far as I know its not a good practise either. And also even if you return <code>POSITION_NONE</code> from <code>getItemPosition()</code> as suggested by other answer(s), you will end up with Exception </p> <blockquote> <p>Caused by: java.lang.IllegalStateException: Can't change tag of fragment.</p> </blockquote> <p>This is because you are trying to reposition alive <code>Fragment</code>s in your <code>List</code> by adding a fragment at 0th index (which causes other fragments to reposition) and <code>ViewPager</code> assigns tags based on position.</p> <p>Keeping all this in mind, here is a tested and <strong>working</strong> modified adapter:</p> <pre><code>public class PagerAdapter extends FragmentPagerAdapter { public static class FragmentInfo { public String classz; public ImageFileObject imageFile; public static long IDS; public long id; public FragmentInfo(){ id = IDS++; } } private final List<FragmentInfo> fragments; private Context context; public PagerAdapter(FragmentManager fm, List<FragmentInfo> fragments, Context context) { super(fm); this.fragments = fragments; this.context = context; } @Override public Fragment getItem(int index) { FragmentInfo info = fragments.get(index); ImageViewFragment frag = (ImageViewFragment) Fragment.instantiate( context, info.classz, /* null arguments*/ null); frag.setImage(info.imageFile); return frag; } @Override public long getItemId(int position) { return fragments.get(position).id; } @Override public int getCount() { return fragments.size(); } @Override public int getItemPosition(Object object) { return POSITION_NONE; } public void add() { FragmentInfo f = new FragmentInfo(); f.classz = ImageViewFragment.class.getName(); fragments.add(0, f); notifyDataSetChanged(); } } </code></pre> <p>Please change your code accordingly.</p>

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