Android screen lock/ unlock programmatically

Question

I am working on a app in which I have to lock and unlock the screen programmatically. Kindly help ! I have no any idea how to develop this type of functionality which support each version of Android OS.

Check out this post. It may help you. [Lock/Unlock Screen][1] [1]: http://stackoverflow.com/a/9193501/1177482 — Mohit Mehta, Oct 04 '12 at 08:30

score 29 · Answer 1 · edited Jan 23 '14 at 09:45

29

To Unlock

KeyguardManager km = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE); 
final KeyguardManager.KeyguardLock kl = km .newKeyguardLock("MyKeyguardLock"); 
kl.disableKeyguard(); 

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); 
WakeLock wakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK
                                 | PowerManager.ACQUIRE_CAUSES_WAKEUP
                                 | PowerManager.ON_AFTER_RELEASE, "MyWakeLock");
wakeLock.acquire();

edited Jan 23 '14 at 09:45

Barend

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answered Nov 07 '13 at 13:08

Viraj Tank

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worked like charm thanks – Muhammad Omer Dec 05 '13 at 10:26
1

worked for me. but deprecated method warnings appear. – MSaudi Dec 21 '13 at 07:34
Worked like Zalo app, Viber app ... Really good. – Huy Tower Aug 31 '15 at 03:24
2

@Barend Not working on Android 4.4 also What should I do to lock the device? – VVB Oct 08 '15 at 11:23
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Both are depreciated. – Polar Mar 14 '16 at 15:37
Does not work with encrypted device running marshmallow, but worked on non-Encrypted device running lollipop. – Thunderstick Dec 12 '16 at 01:52
2

Doesn't work on Nougat (7.0) with secure screen lock. – Matthew Mitchell Dec 14 '16 at 17:27
Very very nice. – Feb 10 '17 at 17:45
On Android 7.1.1 (OnePlus 3) it sets screen on but doesn't disable (fingerprint protected) screen guard – LLL Mar 24 '18 at 14:06

score 12 · Answer 2 · edited Feb 07 '17 at 13:33

12

This link might help you solve your Problem :

Unlock and Lock Programmatically

//Get the window from the context    
WindowManager wm = Context.getSystemService(Context.WINDOW_SERVICE);   

//Unlock
Window window = getWindow();  
window.addFlags(wm.LayoutParams.FLAG_DISMISS_KEYGUARD);  

//Lock device  
DevicePolicyManager mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);

edited Feb 07 '17 at 13:33

A. Badakhshan

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answered Oct 04 '12 at 08:28

Rajeev N B

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With short content in your link, you can paste here in case that page die. – Trung Nguyen Oct 04 '12 at 08:30
1

@Amit PL check [this](http://rdcworld-android.blogspot.in/2012/03/lock-phone-screen-programmtically.html) – swiftBoy Jan 16 '13 at 06:54
This unlock does not work on 4.4.4, the other answer worked. Though with tons of depreciated calls. – catalyst294 Aug 10 '14 at 00:59
non of these answer work for 4.4 – Pazel1374 Feb 20 '19 at 05:58

Android screen lock/ unlock programmatically

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