ViewOutlineProvider 改变View的外形

ViewOutlineProvider 改变View的外形

改方法仅在5.0之后有效

使用方式

        ImageView iv2 = findViewById(R.id.iv2);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            iv2.setClipToOutline(true);
            iv2.setOutlineProvider(new ViewOutlineProvider() {
                @Override
                public void getOutline(View view, Outline outline) {
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                        outline.setOval(0, 0, view.getWidth(), view.getHeight());
                    }
                }
            });
        }