How to make android device always in wake mode?

Question

After successful root of device. Now, I need to make device always in wake state i.e. always visibility of UI and no black screen or any daydream screens. To do so I think I\'ve

Answer 1

So from Developer Options the best you could get is 30 minutes or so of "Wake" ...

According to this, there are a few good applications that can override the functionality and keep your screen on indefinitely:

1. Keep Screen On
2. Stay Alive
3. Wakey

UPDATE

You will need to do research into how Android's file system is structured and how it works, then go and modify its core files. There is no easy way to do what you require. The only way is to create an Android App, that will never have an onDestroy(), and will continuously run in the background. You can use a WakeLock to achieve that.

Look here for how to use the WakeLock