update recycler view while receive fcm notification

Question

I want to refresh my recycler view in fragment while receive FCM notification(if specific fragment is open) else receive notification.

I have tried multiple solutions, but that didn't work.

MyFirebaseMessagingService.java

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    Map<String, String> data = remoteMessage.getData();

    if (remoteMessage.getNotification() != null) {
        String noti_body = remoteMessage.getNotification().getBody();
        String noti_title = remoteMessage.getNotification().getTitle();
        String noti_activity = data.get("activity");

        mBuilder = new NotificationCompat.Builder(this, "M_CH_ID")
                .setSmallIcon(R.mipmap.logo)
                .setContentTitle(noti_title)
                .setContentText(noti_body)
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.logo))
                .setColor(getResources().getColor(R.color.colorAccent))
                .setDefaults(Notification.DEFAULT_ALL)
                .setPriority(NotificationManager.IMPORTANCE_HIGH)
                .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
                .setAutoCancel(true); // clear notification after click

    if (remoteMessage.getData().size() > 0) {
    fragmentNewJobs c = new fragmentNewJobs();
    if (c.getUserVisibleHint()) {//fragmentNewJobs.is_open
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.putExtra("activity", noti_activity);
        getApplicationContext().startActivity(intent);
    }else {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.putExtra("activity", noti_activity);

        @SuppressLint("WrongConstant")
        PendingIntent pi = PendingIntent.getActivity(this, 0, intent, Intent.FLAG_ACTIVITY_NEW_TASK);
        mBuilder.setContentIntent(pi);
        NotificationManager mNotificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.notify(0, mBuilder.build());
    }
   }
  }
}

fragmentNewJobs c = new fragmentNewJobs(); if (c.getUserVisibleHint())

I have tried this, but it load fragmentNewJobs.java even I have opened any screen.

I want to refresh recyclerView in fragmentNewJobs.java only if fragmentNewJobs is open else receive notification.
1. I want to add only new item to recyclerView(not load all data if possible)

Khemraj Sharma · Answer 1 · 2018-11-14T06:33:30.083

1

i want to add only new item to recycler view(not load all data if possible)

You can use BroadcastManager to send notification event to your existing Activity. Running Activity will add new item in List when it receive new broadcast.
Another option to notify Activity can be EventBus, that is fast growing, easy implementation library for notifying between Services, Activities and Fragments.

How to use BroadcastManager?

How to use EventBus?

i want to refresh recyclerview in fragmentNewJobs.java only if fragmentNewJobs is open else receive notification.

For this you can take a static boolean in Application class, and make it true on Fragment's onResume() and make it false on onPause().

Then you can check Fragment's visibility by ApplicationClass.isFragmentVisible()

Edit

You can change fragmentVisible boolean inside setUserVisibleHint() of Fragment, that will work perfectly. You will need to make initially UserVisibleHint false because it is true default. Check this answer for better understanding.

edited Nov 14 '18 at 06:33

answered Nov 14 '18 at 05:19

Khemraj Sharma

57,232
27
203
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Broadcast works perfectly. but on pause is not called when i switch to other activity or fragment. – Asif Ullah Nov 14 '18 at 06:08
1

Fragment `onPause()` will always called when user is going to other Screen, either Activity or Fragment. Did you set logs in `onPause()` of fragment? – Khemraj Sharma Nov 14 '18 at 06:13
yes. i have override all methods like onPause, Onstop, OnDestroy etc.. I have multiple Fragments in MainActivity and in fragment i have view pager and set 3 tabs. if swipe to 3rd tab. then onPause calls but if change fragment from navigaton drawer then nothing is called. @Override public void onPause() { is_open = false; Log.d( "receiversender: ", "on pause"); super.onPause(); } – Asif Ullah Nov 14 '18 at 06:21
1

That is not called because fragment is inside another parent fragment, so it is not destroyed. It just goes in stack. – Khemraj Sharma Nov 14 '18 at 06:29
any solution Please? – Asif Ullah Nov 14 '18 at 06:31

score 1 · Answer 2 · answered Nov 14 '18 at 05:22

1

You can use Event Bus to publish message from receiver to particular fragment or activity.

And to findout if activity is visible or not have a look at this

Or if you are using fragment you can use static variable in Application class to track fragment(Most basic use)

answered Nov 14 '18 at 05:22

taman neupane

938
9
18

thanks @taman. Broadcast works perfectly. but (on pause , on stop , onDestroy etc )is not called when i switch to other activity or fragment. i am using it in fragment. – Asif Ullah Nov 14 '18 at 06:10
1

If you are using broadcast make sure to check out changes in marshmello for broadcast. (Broadcast receiver must be registered and unregistered from code not only from manifest) – taman neupane Nov 14 '18 at 06:12
yes. broadcast is working perfectly. only issue is how to unregistered when fragment state changes? or fragment is not active/visible? – Asif Ullah Nov 14 '18 at 06:28

update recycler view while receive fcm notification

2 Answers2