Does not work when screen is off

[gadgetreviews]

I managed to write a code to replace default phone app as explained in this repository. It is working only when screen is turned on. If screen is turned off, I can only hear ring tone, screen does not turn on. If I turn on screen manually, I can't see any call interface (not mine or not system default phone app. So I can't handle answer that call). How can I turn on screen when phone rings? I've tried several solutions about how to turn on screen, but no one is working in this case.

Any suggestions?

[multimediaixd]

    getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
            | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
            | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
            | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);

copy this in CallActivity

[sumitsonawane]

not working in Xiaomi devices.