需求描述：ImageView的上面兩個角為圓角，下面兩個角不變

解決方案：重寫ImageView控制元件，在onDraw方法中，設定Path來達到目的

控制元件程式碼如下：

public class RoundRectImageView extends ImageView {

    /*左上角xy半徑，右上角，右下角，左下角*/

private float[] rids = {10.0f, 10.0f, 10.0f, 10.0f, 0.0f, 0.0f, 0.0f, 0.0f,};
    public RoundRectImageView(Context context) {
        super(context);
}

@Override

protected void onDraw(Canvas canvas) { Path path = new Path(); int w = this.getWidth(); int h = this.getHeight();path.addRoundRect(new RectF(0, 0, w, h), rids, Path.Direction.CW);canvas.clipPath(path); super.onDraw(canvas);}}

上面控制元件中設定的是上面兩個叫為圓角，具體需求可改變對應引數來達到目的