Android实现Imageview上面圆角下面直角效果

如图背景为四个角都是圆角的图片，我们完全可以使用shape写出四个圆角，包括描边 填充色等，代码如下：

xml version="1.0" encoding="utf-8"?>
xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    
    android:color="#EFEFEF" />
    
    
    android:radius="5dip" />

          android:width="0.1dp"
        android:color="#D8D8D8" />

solid为填充的颜色，stroke为描边颜色 corners为圆角弧度 ，以上代码便完成了 背景圆角的效果，可是如何实现imageview上面的两个直角变成圆角呢，这时候就需要我们自定义一个view继承自Imageview对Imageview的样式进行一定的修改

public class YuanJiaoImageView extends ImageView {

    //圆角弧度
    private float[] rids = {10.0f,10.0f,10.0f,10.0f,0.0f,0.0f,0.0f,0.0f,};

    public YuanJiaoImageView(Context context) {
        super(context);
    }

    public YuanJiaoImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public YuanJiaoImageView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }


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

下面是关于drawRoundRect方法的用法