Android: How to turn screen on and off programmatically?

Question

Before marking this post as a \"duplicate\", I am writing this post because no other post holds the solution to the problem.

I am trying to turn off the device, then

Answer 1

I had written this method to turn on the screen after screen lock. It works perfectly for me. Try it-

    private void unlockScreen() {
        Window window = this.getWindow();
        window.addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
        window.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
        window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
    }

And call this method from onResume().