Do not create async task in background process

app/src/main/java/app/insti/InstiAppFirebaseMessagingService.java

@@ -130,9 +130,7 @@ public class InstiAppFirebaseMessagingService extends FirebaseMessagingService {
             final Context context, final String imageUrl, final String largeIconUrl,
             final int notification_id, final NotificationCompat.Builder builder, final String content){
 
-        new AsyncTask<Void, Void, Bitmap[]>() {
-            @Override
-            protected Bitmap[] doInBackground(Void... params) {
+            Bitmap[] bitmaps = null;
             try {
                 Bitmap image = null;
                 if (imageUrl != null) {
@@ -143,15 +141,11 @@ public class InstiAppFirebaseMessagingService extends FirebaseMessagingService {
                      largeIcon = getCroppedBitmap(
                              Picasso.get().load(Constants.resizeImageUrl(largeIconUrl, 200)).get(), 200);
                 }
-                    return new Bitmap[]{image, largeIcon};
+                bitmaps = new Bitmap[]{image, largeIcon};
             } catch (IOException e) {
                 e.printStackTrace();
             }
-                return null;
-            }
 
-            @Override
-            protected void onPostExecute(Bitmap[] bitmaps) {
             // Check if we loaded big image
             if (bitmaps != null && bitmaps[0] != null) {
                 builder.setStyle(
@@ -167,9 +161,6 @@ public class InstiAppFirebaseMessagingService extends FirebaseMessagingService {
             }
 
             showNotification(context, notification_id, builder.build());
-                super.onPostExecute(bitmaps);
-            }
-        }.execute();
     }
 
     /** Get circular center cropped bitmap */