FragmentPagerAdapter notifyDataSetChanged not working

Question

I got a FragmentPagerAdapter. It\'s getItem method can return a fragment according to data it has from the outside. After I update the data its suppose to display I

Answer 1

I have faced the similar problem when I was working on my last project. So I found few Solution.

1. by overriding getItemPosition in the pager adaptor but this is not a good idea.

   @Override
   public int getItemPosition(Object object) {
       // it will recreate all Fragments when
       // notifyDataSetChanged is called
       return POSITION_NONE;
   }
   

2. The second one is cabezas Solution.

3. Most Stable solution override getItemPosition in below fashion:

       @Override
       public int getItemPosition(Object object) {
           if (object instanceof MyFragment) {
               // Create a new method notifyUpdate() in your fragment 
               // it will get call when you invoke 
               // notifyDatasetChaged();
               ((MyFragment) object).notifyUpdate();
           }
           //don't return POSITION_NONE, avoid fragment recreation.
           return super.getItemPosition(object);
       }