Android Wear watchface keep screen on

Question

I am using the official android watch face API and I want to keep the screen on for a couple of seconds during an animation so that the screen doesn't go into ambient mode during the animation and once the animation is finished, I want to reset everything back to normal, is this possible? My class extends CanvasWatchFaceService and I am also extending the CanvasWatchFaceService.Engine So I want something similar to this but for a watchface:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

Then this:

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON).

Answer 1

You need to explicitly hold wake lock: http://developer.android.com/reference/android/os/PowerManager.WakeLock.html

Get a wake lock that keeps the screen on and release it when you finish animating.

Here is a document about keeping the device awake: https://developer.android.com/training/scheduling/wakelock.html

And here is an example:

PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);

WakeLock wakeLock = powerManager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK,
        "WatchFaceWakelockTag"); // note WakeLock spelling

wakeLock.acquire();