Refresh or Force Redraw the Fragment

Refresh or redraw Fragment's View

Since there doesn't appear to be a way to force the Fragment's view to be refreshed I ended up just detaching and re-attaching the fragment so the onCreateView() is called again. This seems to work just how I wanted it to. I used this solution as a starting point but needed to add commitAllowingStateLoss() to prevent a crash: https://stackoverflow.com/a/19409266/1234752. Allowing state loss is fine here because the Fragment is just reused and the data is still contained in it.

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == Activity.RESULT_OK) {
        myFragment.updateData(data.getString(NEW_BUTTON_TEXT));
        // Need to use commitAllowingStateLoss() to prevent an IllegalStateException 
        // from being thrown
        getSupportFragmentManager()
            .beginTransaction()
            .detach(mContactDetailsFragment)
            .attach(mContactDetailsFragment)
            .commitAllowingStateLoss();
    }
}

Method to refresh Fragment content when data changed ( like recall onCreateView)

Detach and attach it with

Fragment currentFragment = getFragmentManager().findFragmentByTag("YourFragmentTag");
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.detach(currentFragment);
fragmentTransaction.attach(currentFragment);
fragmentTransaction.commit();

or search fragment with

Fragment currentFragment = getActivity().getSupportFragmentManager().findFragmentById(R.id.container);

Refresh Fragment at reload

I think you want to refresh the fragment contents upon db update

If so, detach the fragment and reattach it

// Reload current fragment
Fragment frg = null;
frg = getSupportFragmentManager().findFragmentByTag("Your_Fragment_TAG");
final FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.detach(frg);
ft.attach(frg);
ft.commit();

Your_Fragment_TAG is the name you gave your fragment when you created it

This code is for support library.

If you're not supporting older devices, just use getFragmentManager instead of getSupportFragmentManager

[EDIT]

This method requires the Fragment to have a tag.

In case you don't have it, then @Hammer's method is what you need.

refresh the fragment when getting back from an activity or pressing back

I fixed the issue by replacing onStop() function to onPause() since the activity is not getting destroyed and it no longer loop the createRecentlyViewedButton() function hope this help somebody

here are the changes I made though

override fun onPause() {
    super.onPause()
    shouldRefreshOnResume = true
}

and

   override fun onResume() {
        super.onResume()
        //shoudRefreshOnResume is a global var
        if (shouldRefreshOnResume) {
        val recentlyViewed = activity?.findViewById<LinearLayout>(R.id.recently_viewedView)
        createRecentlyViewedButton(recentlyViewed!!)
        }
    }

Refresh fragment when change between tabs

When a Fragment is made visible (i.e., the selected page in your ViewPager), its setUserVisibleHint() method is called. You can override that method in your TwoFragment and use it to trigger a refresh.

public class TwoFragment extends Fragment {

  @Override
  public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);
    if (isVisibleToUser) {
      // Refresh your fragment here
    }
  }