FLAG_CANCEL_CURRENT or FLAG_UPDATE_CURRENT

Question

My app sets a repeating alarm on user interaction, it might change the interval time set for the broadcast with Alarm Manager.
There is not much in the way of extras.

Answer 1

If you are not using extras, you don't have to specify any of those flags. They only change how the systems handles extras with a PendingIntent: replace the ones in the current matching (cached by the system PendingIntent) or cancel it and create a new one. Refer to the documentation for details: http://developer.android.com/reference/android/app/PendingIntent.html#FLAG_CANCEL_CURRENT