Android - problems using FragmentActivity + Loader to update FragmentStatePagerAdapter

Question

I\'m trying to use FragmentActivity with ViewPager to display dynamic list of Fragments. There are plenty of examples on how to do a s

Answer 1

I had a very similar problem to this and solved it by using a handler on the Fragment.

I wanted to show an alert dialog on onLoadFinished(), similar to the following

public class MyFragment extends Fragment 
    implements LoaderManager.LoaderCallbacks {

    public void onLoadFinished(Loader loader, T data) {
        showDialog();
    }

    public void showDialog() {
        MyAlertDialogFragment fragment = new MyAlertDialogFragment();
        fragment.show(getActivity().getSupportFragmentManager(), "dialog");

    }
}

But this gave an error

can not perform this action inside of onLoadFinished

The solution was to add a handler to the fragment to take care of showing the dialog

private Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        if(msg.what == MSG_SHOW_DIALOG) {
            showDialog();
        }
    }
};

And then modify onLoadFinished(...) to send a message to the handler instead

   public void onLoadFinished(Loader loader, T data) {
        handler.sendEmptyMessage(MSG_SHOW_DIALOG);
    }