Draw Overlay in Android (system wide)

Question

Is there a way to draw an overlay window always on top of any android application?

I am using Android x86 port and have system rights.

@Edit: The view below

Answer 1

You can use my library just removing this method addWatermarkWithinApplicationLifecycle() which sticks the overlay with the app lifecycle (As you want to show the overlay all over the phone app). Please also don't forget to add these permissions -

The gif preview of my library -