Android How to pass data from Activity to Fragment once successful volley request?

Question

I want to pass data from an activity to a fragment via BroadcastReceiver. But I cant get the data in the fragment,cause the onReceive() there not fire up.

In my AppConfig:

public static final String CREATE_POST = "created_post";

In activity A implement all this stuff :

 StringRequest request = new StringRequest(Request.Method.POST, AppConfig.MYURL, new Response.Listener<String>(){
            @Override
            public void onResponse(String response) {

    Intent intent = new Intent(AppConfig.CREATE_POST);
    intent.putExtra("myId",myId);
    intent.putExtra("userId",userId);
    intent.putExtra("username",username);

    LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}

In the fragment with should be receive the data I already implement this :

private BroadcastReceiver broadcasterReceiver;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

//..other code here

    broadcasterReceiver = new BroadcastReceiver() {
       @Override
       public void onReceive(Context context, Intent intent) {
          if(intent.getAction().equals(AppConfig.CREATE_POST)){
             Log.d("Broadcast","get called")
             //HERE I get the intent here
          }
       }

 }


//I already register the boardcast in onResume() and onPause()
@Override
    public void onResume() {
        super.onResume();
        //register the broadcaster
        LocalBroadcastManager.getInstance(getActivity()).registerReceiver(broadcasterReceiver,
                new IntentFilter(AppConfig.CREATE_POST));
    }

  @Override
  public void onPause() {
    super.onPause();
   //unregister the broadcaster
        LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(broadcasterReceiver);
    }

What I still missing out? In order to make this work.

Answer 1

First of all, create an interface anywhere in your package. For eg -

public interface SyncDataListener {
    void refreshDashboard(String myId, String username, String userId);
}

Then in your Activity, create a global declaration and setter/resetter methods like -

private SyncDataListener syncDataListener;

public void setSyncDataListener(SyncDataListener syncDataListener) {
    this.syncDataListener = syncDataListener;
}

public void resetSyncDataListener(){
    syncDataListener = null;
}

Next in your Fragment implement the above interface and override the method like -

public class DashboardFragment extends Fragment implements SyncDataListener {  
    @Override
    public void refreshDashboard(String myId, String username, String userId) {
        //Your code that deals with the data received from activity
    }
}

Also in the Fragment's onAttach(Context context) method call the setter method created in the activity like -

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    ((MainActivity) getActivity()).setSyncDataListener(this);
}

Also make sure you reset the listener instance when your Fragment gets destroyed like -

@Override
public void onDestroyView() {
    super.onDestroyView();
    ((MainActivity) getActivity()).resetSyncDataListener();
}

Now whenever you need to send data from Activity to Fragment you can call -

if (syncDataListener != null) {
    syncDataListener.refreshDashboard(myId, username, userId);
}