Update ViewPager dynamically?

Question

I can\'t update the content in ViewPager.

What is the correct usage of methods instantiateItem() and getItem() in FragmentPagerAdapter class?

I was using onl

Answer 1

This might be of help to someone - in my case when inserting a new page the view pager was asking for the position of an existing fragment twice, but not asking for the position of the new item, causing incorrect behaviour and data not displaying.

1. Copy the source for for FragmentStatePagerAdapter (seems to have not been updated in ages).

2. Override notifyDataSetChanged()

   @Override
   public void notifyDataSetChanged() {
       mFragments.clear();
       super.notifyDataSetChanged();
   }
   

3. Add a sanity check to destroyItem() to prevent crashes:

   if (position < mFragments.size()) {
       mFragments.set(position, null);
   }