Intent - if activity is running, bring it to front, else start a new one (from notification)

Question

My app has notifications, which - obviously - without any flags, start a new activity every time so I get multiple same activities running on top of each other, which is jus

Answer 1

I tried this, and it worked even though the IDE was complaining about the code

Intent notificationIntent = new Intent(THIS_CONTEXT, MainActivity.class);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
    PendingIntent intent = PendingIntent.getActivity(THIS_CONTEXT, 0, notificationIntent, Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(THIS_CONTEXT)
            .setSmallIcon(R.drawable.cast_ic_notification_0)
            .setContentTitle("Title")
            .setContentText("Content")
            .setContentIntent(intent)
            .setPriority(PRIORITY_HIGH) //private static final PRIORITY_HIGH = 5;
            .setAutoCancel(true)
            /*.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE | Notification.DEFAULT_LIGHTS)*/;
    NotificationManager mNotificationManager = (NotificationManager) THIS_CONTEXT.getSystemService(Context.NOTIFICATION_SERVICE);
    mNotificationManager.notify(0, mBuilder.build());