mFragmentFavorite in your code is a FragmentActivity which is not the same thing as a Fragment. That’s why you’re getting the type mismatch. Also, you should never call new on an Activity as that is not the proper way to start one. If you want to start a new instance of mFragmentFavorite, you can do … Read more
So obviously adjust for your specific needs, but this is what I use for my Application. Fragment frag = getSupportFragmentManager().findFragmentByTag(“android:switcher:” + R.id.pager + “:” + mPager.getCurrentItem()); if(frag!=null&&mPager.getCurrentItem()==0) { ((Fragment1) frag).changeImageView(1); }
You can directly call getParentFragmentManager() to get the fragment manager. Note that getFragmentManager() also works but has been marked as deprecated.
What you’re doing is correct. Fragments don’t have access to the ActionBar APIs, so you have to call getActivity. Unless your Fragment is a static inner class, in which case you should create a WeakReference to the parent and call Activity.getActionBar from there. To set the title for your ActionBar, while using a custom layout, … Read more