Android screen lock/ unlock programmatically [duplicate]

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.

Nicaea

Check out this post. It may help you. [Lock/Unlock Screen][1] [1]: https://mcmap.net/q/372695/-how-to-display-activity-when-the-screen-is-locked – Capitalization

check github.com/amirarcane/lock-screen – Almost

Answer 1

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();

Madlin

worked for me. but deprecated method warnings appear. – Corinnacorinne

Worked like Zalo app, Viber app ... Really good. – Rabassa

@Barend Not working on Android 4.4 also What should I do to lock the device? – Candelariacandelario

Both are depreciated. – Dioptrics

Does not work with encrypted device running marshmallow, but worked on non-Encrypted device running lollipop. – Perchloride

Doesn't work on Nougat (7.0) with secure screen lock. – Hornbook

Very very nice. – Linalinacre

On Android 7.1.1 (OnePlus 3) it sets screen on but doesn't disable (fingerprint protected) screen guard – Lorenzoloresz

Answer 2

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);

Riant

With short content in your link, you can paste here in case that page die. – Liebfraumilch

@Nicaea PL check this – Bogus

This unlock does not work on 4.4.4, the other answer worked. Though with tons of depreciated calls. – Compare

non of these answer work for 4.4 – Rohrer