public class TextureVideoViewOutlineProvider extends ViewOutlineProvider {
        private float mRadius;
     
        public TextureVideoViewOutlineProvider(float radius) {
            this.mRadius = radius;
        }
     
        @Override
        public void getOutline(View view, Outline outline) {
            Rect rect = new Rect();
            view.getGlobalVisibleRect(rect);
            int leftMargin = 0;
            int topMargin = 0;
            Rect selfRect = new Rect(leftMargin, topMargin,
                    rect.right - rect.left - leftMargin, rect.bottom - rect.top - topMargin);
            outline.setRoundRect(selfRect, mRadius);
        }
    }
 

    mView.setOutlineProvider(new TextureVideoViewOutlineProvider(radius));
    mView.setClipToOutline(true);