Turning on screen programmatically

Question

I would like to unlock screen and switching it on to show a popup on an event trigger. I am able to unlock the screen using

newKeyguardLock = km.newKeyguardLock(HANDSFREE);
newKeyguardLock.disableKeyguard();

on KeyGuardService but I cannot turn on the screen. I am using

wl = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, HANDSFREE);
wl.acquire();

but with no success. The screen still remains off. How can I achieve this?

undefined · Accepted Answer · 2018-11-02T17:08:14.623

Note from author: I wrote this back in 2012. I don't know if it works anymore. Be sure to check out the other more recent answers.

Amir's answer got me close, but you need the ACQUIRE_CAUSES_WAKEUP flag at least (Building against Android 2.3.3).

WakeLock screenLock = ((PowerManager)getSystemService(POWER_SERVICE)).newWakeLock(
     PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG");
screenLock.acquire();

//later
screenLock.release();

Vikasdeep Singh · Answer 2 · 2018-09-12T12:15:45.370

10

This is very popular question but the accepted answer now is outdated.

Below is latest way to Turn On Screen OR wake up your device 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 WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON but FLAG_TURN_SCREEN_ON flag has been deprecated in API level 27 so you can use Activity.setTurnScreenOn(true) from API level 27 onward.

edited Sep 12 '18 at 12:15

answered Jun 22 '18 at 01:29

Vikasdeep Singh

20,983
15
78
104

I provided Kotlin solution here: https://stackoverflow.com/a/76755187/10233647 – The_Long_Distance_Runner Jul 24 '23 at 13:55

score 3 · Answer 3 · edited Jun 28 '12 at 10:22

3

In your main activity's OnCreate() write following code:

((PowerManager)getSystemService(POWER_SERVICE)).newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "TAG").acquire();

It causes the device to wake up.

Do not forget disableKeyguard() to unlock the device...

edited Jun 28 '12 at 10:22

Nikhil

16,194
20
64
81

answered Dec 22 '11 at 13:48

Amir Dashti

369
3
14

score 1 · Answer 4 · answered Nov 26 '17 at 05:07

undefined's answer with NullPointer check and set timeout :

private void turnOnScreen() {
    PowerManager.WakeLock screenLock = null;
    if ((getSystemService(POWER_SERVICE)) != null) {
        screenLock = ((PowerManager)getSystemService(POWER_SERVICE)).newWakeLock(
                PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG");
        screenLock.acquire(10*60*1000L /*10 minutes*/);


        screenLock.release();
    }
}

score 1 · Answer 5 · answered Nov 03 '21 at 10:04

This is how you can do it:

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();

make sure to set permission in the manifest :

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

score 0 · Answer 6 · answered Jul 24 '23 at 13:54

2023 working Kotlin version

I needed to modify this answer https://stackoverflow.com/a/50979446/10233647 a little bit, but finally managed to make it work!

Try simply:

val window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON)
window.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED)

This really wakes the screen, when it's locked!

Turning on screen programmatically

6 Answers6

Linked

Related