GDK / APK for Google Glass - Keep screen from dimming

Question

What part of the code in the four sample APK projects listed here for Google Glass prevents the screen from dimming?

When I write my own APK and sideload it, after t

Answer 1

The only way that worked for me was by acquiring a wakeLock:

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
WakeLock wakeLock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK , TAG);
wakeLock.acquire(WAKE_LOCK_DURATION_IN_MILLIS);

You also need a permission for that:

<uses-permission android:name="android.permission.WAKE_LOCK" />

Answer 2

There are a couple easy ways you can do this without requesting a wake lock:

• Add the android:keepScreenOn="true" attribute to the root element of your layout.

• Or, do the following in your onCreate method:

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