I want to create an alert application. The alert is received using GCM (GoogleCloudMessaging). Now I want to show the alert message on the screen without any actions by the user. Therefore I need to wake up the device and unlock the screen.
In the forum I found this answer (and some similar) describing how I can achieve this behaviour: android-wake-up-and-unlock-device
Reading the documentation, using WakeLocks seems to be deprecated: i.e.
full_wake_lock
FULL_WAKE_LOCK Added in API level 1
int FULL_WAKE_LOCK
This constant was deprecated in API level 17. Most applications should use FLAG_KEEP_SCREEN_ON instead of this type of wake lock, as it will be correctly managed by the platform as the user moves between applications and doesn't require a special permission.
In the documentation an alternative is shown using the WindowManager.
With help of the flags
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
I should be able to bring my alert message to the front without asking for the keyguard secure pattern.
My question now is:
When I want to use these flags, do I also need a wakeLock to wake up my device or is this done implicit by the window manager?
