How to prevent automatic screen lock on android by

Question

In my app there is a long loading process, and if the devices puts on the screen lock, my process stops for some reason.

How can i prevent the device from automatic screen lock?

Answer 1

The following line allows your phone to be ON when the app is in foreground

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

The following instructions allow us to disable the lock screen when lock button is pressed. KeyguardLock class was deprecated in API level 13

/*onCreate*/
KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE);
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE); // Deprecated :/
lock.disableKeyguard();

And in your manifest:

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

Answer 2

Another way to keep the screen lock on without having to request the permission in the manifiest is:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

Are you doing your long loading process in the UI thread? Something doesn't seem right - if the process is so long that the screen lock timesout and your process ends, perhaps it needs to go in a background service.

Answer 3

KeyguardManager keyguardManager = (KeyguardManager)getSystemService(Activity.KEYGUARD_SERVICE);
KeyguardLock lock = keyguardManager.newKeyguardLock(KEYGUARD_SERVICE);
lock.disableKeyguard();

in androidmanifest:

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

OR

Follow this link

Answer 4

XML Way:

Just use keepScreenOn attribute in your parent layout:

<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:keepScreenOn="true">

programmatically:

You can set it programmatically by adding flag:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)

Answer 5

one interesting option that wasn't mentioned yet is the

View#setKeepScreenOn(boolean onOff)

method. This can actually be used dynamically at any point during the runtime of the app, e.g. for setting the screen mode depending on the app state

Answer 6

Go with the key guard code its working perfectly,

Just Paste the code in onCreate Method in your mainactivity file And Permission in android manifest file