Keep the device awake on Android using PowerManager

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

PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
        "MyWakelockTag");
wakeLock.acquire();

wakelock.release()

keep wakeLock for whole app

public class MyApp extends Application 
{
    private static final String TAG = MyApp.class.getSimpleName();
    private PowerManager.WakeLock mWakeLock = null;

    @Override
    public void onCreate() {
        super.onCreate();

        final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
        mWakeLock.acquire();
    }

    @Override
    public void onTerminate() {
        if (mWakeLock.isHeld())
            mWakeLock.release();
        super.onTerminate();
    }
}

Use a broadcast receiver that keeps the device awake

References
https://developer.android.com/training/scheduling/wakelock
https://developer.android.com/topic/performance/vitals/wakelock
https://stackoverflow.com/questions/9000563/partial-wake-lock-is-not-working

Related