Turn ON Screen programmatically on Android

Question

I need to programmatically turn the screen on when the user turns off with power button, and yes I always have the correct flags in the Activity to keep screen on, but it does not avoid user pressing power button.

So far I've found a solution but it uses a deprecated wakelock

sWakeLock = sPM.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, TAG_WAKELOCK);

sWakeLock.acquire();
sWakeLock.release();

There is a better way to achieve it?

So the user has given a clear, unambiguous signal that they want the screen turned off, but you know better? This sounds like a dreadful user interface. — , May 07 '15 at 01:54
The screen should be always on, and I want to prevent accidental power button press in specific situations — sherpya, May 07 '15 at 11:07

score 18 · Answer 1 · answered May 07 '15 at 02:05

18

In Lollipop you might want to add some more flags:

final Window win = getWindow();
    win.addFlags( WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
            WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
            WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
            WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON |
            WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON );

I got this from the AOSP https://android.googlesource.com/platform/packages/apps/DeskClock/+/dfd1960/src/com/android/deskclock/alarms/AlarmActivity.java

answered May 07 '15 at 02:05

rubmz

1,947
5
27
49

1

Happy to help! And greedy me - please mark my answer as correct? Thanks! – rubmz Apr 23 '16 at 22:24
3

I'm not the person who made the question. I just saw it worked, up voted and said thanks – Leonardo Sibela Apr 23 '16 at 22:28

Vikasdeep Singh · Answer 2 · 2018-06-23T01:38:18.253

11

Here is the latest way to Turn On Screen from an activity:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
    this.setTurnScreenOn(true);
} else {
    final Window window = getWindow();
    window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
}

Use FLAG_TURN_SCREEN_ON but this flag has been deprecated in API level 27 so use Activity.setTurnScreenOn(true) from API level 27 onwards.

edited Jun 23 '18 at 01:38

answered Jun 22 '18 at 01:32

Vikasdeep Singh

20,983
15
78
104

1

Thank you. This information is very useful. – dcarl661 Mar 26 '21 at 16:43
1

this didnt work on Huawei but thank it worked until i addded more FLAGS like @rubmz mentioned WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON – Ridha Rezzag May 02 '21 at 14:17

score 11 · Answer 3 · answered Dec 12 '19 at 01:18

Code

 PowerManager powerManager = (PowerManager) context.getSystemService(context.POWER_SERVICE);
    PowerManager.WakeLock  wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK |
            PowerManager.ACQUIRE_CAUSES_WAKEUP |
            PowerManager.ON_AFTER_RELEASE, "appname::WakeLock");

    //acquire will turn on the display
    wakeLock.acquire();

    //release will release the lock from CPU, in case of that, screen will go back to sleep mode in defined time bt device settings
    wakeLock.release();

in the Manifest file, the permission should be

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

Turn ON Screen programmatically on Android

3 Answers3