Disabling screen sleep Programmatically in Android?

Can you please tell me how to prevent the Android Activity from sleep mode programmatically. Or can we declare someth开发者_开发技巧ing related to this in Android Manifest file.

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setKeepScreenOn(true)

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You can do

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

You can add this code in your onCreate() method of your activity. or you can put it in your xml file

android:keepScreenOn="true"