Creating a system overlay window (always on top)

Question

I\'m trying to create an always-op-top button/clickable-image which stays on top of all the windows all the time.

The proof of concept is

• here - Smar

Answer 1

TYPE_SYSTEM_OVERLAY This constant was deprecated in since API level 26. Use TYPE_APPLICATION_OVERLAY instead. or **for users below and above android 8

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
    LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
}