mWindowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);


    DisplayMetrics displaymetrics = new DisplayMetrics();
    int screenWidth = displaymetrics.widthPixels;
    int screenHeight = displaymetrics.heightPixels;

    params = new WindowManager.LayoutParams(
            720, 1280,
            0, 0,
            WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                    | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
                    | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
                    | WindowManager.LayoutParams.FLAG_FULLSCREEN,
            PixelFormat.TRANSLUCENT);

    mWindowManager.addView(testDrawView, params);

class BrRec extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {

        mHeadLayer.rects.clear();
        mHeadLayer.rects = (ArrayList<Rect>) intent.getSerializableExtra("rects");


        for (int i = 0; i < mHeadLayer.rects.size(); ++i)
        {
            mHeadLayer.invalidate(mHeadLayer.rects.get(i));
        }

        mHeadLayer.invalidate();}}