popBackStack with Pass Parse Object

Question

I have an Activity A. Activity A calls fragment frag1. frag1 calls fragment frag2. Lastly frag2 calls frag3.

When I click on a button in frag3, I want to call frag1, pass and parse an object from frag3 to frag1. I tried to do this with an object bundle sent from frag3 to frag1.

I see that there is a popBackStack() method. However, I am a little confused on how this would work. Is it safe to use this method?

I do not know how to do it. Thanks in advance.

Answer 1

Use Event Bus pattern for passing data(events) between fragments. Then work with you fragment stack in usual way.

There are several popular libraries that implement event bus. I personally prefer

• EventBus
• Otto

Answer 2

use Local Broadcast for this.

write Broadcast receiver on fragment 1,

On apply button of fragment 3, broadcast your data , and then pop fragment 3

example-

private final BroadcastReceiver myLocalBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
           ;

            Bundle bundle = intent.getExtras();

            if (bundle != null) {

             get data from bundle



            }



    };

on fragment 3(apply button):

      Intent localBroadcastIntent = new Intent(Constant.MY_ACTION);


        Bundle bundle = new Bundle();
        bundle.put("your data);

        localBroadcastIntent.putExtras(bundle);

        LocalBroadcastManager myLocalBroadcastManager =           LocalBroadcastManager.getInstance(getActivity());
        myLocalBroadcastManager.sendBroadcast(localBroadcastIntent);





        getActivity().getSupportFragmentManager().popBackStack();