How to create a floating touchable activity that still allows to touch native controls outside of its borders?

Question

What I am trying to achieve is best explained by the scheme I made with mspaint:

I have tried to set FLAG_NOT_TOUCH_MODAL which by the descript

Answer 1

You can use activity with special theme in your AndroidManifest file:

And also don't forget to set mach_parent attribute in Activity like:

override fun onStart() {
        super.onStart()
        window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
    }