Keep the screen awake throughout my activity

Question

I have three activities in my app. I want to keep the screen awake when it is in the second activity. The screen should not go off in my second activity unless the \"lock\"

Answer 1

try to use this

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