wm = (WindowManager) getSystemService(WINDOW_SERVICE);
int type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT | WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
int flags = WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
int format = PixelFormat.TRANSLUCENT;
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
type, flags, format);
params.gravity = Gravity.RIGHT | Gravity.TOP;
wm.addView(lockScreenView, params);
I tried to use FLAG_LAYOUT_NO_LIMIT or FLAG_FULLSCREEN. But it's only available on devices that have a hard home button. They are unavailable in devices have a navigation bar or virtual keyboard.
