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I have been using Notification s for a while, and yesterday I noticed that the documentation of PendingIntent says that the Intent that is passed to the PendingIntent.getActivity() method must have the FLAG_ACTIVITY_NEW_TASK set: Note that the activity will be started outside of the context of an existing activity, so you must use the Intent.FLAG_ACTIVITY_NEW_TASK launch flag in the Intent. However, I have never set this flag when using Notification s, and yet so far I have not experienced any problem. I have seen out there several examples of Notification s where the FLAG_ACTIVITY_NEW_TASK is not set for the Intent that the PendingIntent is referencing. In particular, the official guide shows the snippet below: Context context = getApplicationContext(); CharSequence contentTitle = "My notification"; CharSequence contentText = "Hello World!"; Intent notificationIntent = new Intent(this, MyClass.class); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent); And as you can see, they are not setting the FLAG_ACTIVITY_NEW_TASK flag. So my question is, should I always set the FLAG_ACTIVITY_NEW_TASK flag when using PendingIntent.getActivity() , or are there some scenarios in which it can be omitted? In particular, when using Notification s, can I use an Intent without setting this flag?

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