自定义控件图片圆形和边框

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
* Created by lenovo on 2017/10/25.
*/

public class CircleImageView extends android.support.v7.widget.AppCompatImageView {
public CircleImageView(Context context) {
super(context);
}

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

public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}

private int bWidth = 10;// 边框宽度
private int bColor = Color.WHITE;// 边框颜色

/**
* 设置圆形图片的边框颜色
* @param color
*/
public void setBorderColor(int color) {
bColor = color;
}

/**
* 设置圆形图片的边框宽度
* @param
*/
public void setBorderWidth(int width) {
bWidth = width;
}

/**
* 设置圆形图片的边框宽度和颜色
* @param
*/
public void setBorderWidth(int width, int color) {
bWidth = width;
bColor = color;
}

@Override
public void setImageBitmap(Bitmap bm) {

int d = Math.min(bm.getWidth(), bm.getHeight());// 或得圆直径
Bitmap dest = Bitmap.createBitmap(d, d, bm.getConfig());// 创建一个副本
// 画边框
Canvas c = new Canvas(dest);
Paint paint = new Paint();
paint.setColor(bColor); // 边框颜色
paint.setAntiAlias(true);// 设置抗锯齿
c.drawCircle(d / 2, d / 2, d / 2, paint);
// 画圆
Path path = new Path();
path.addCircle(d / 2, d / 2, d / 2 - bWidth, Path.Direction.CW);
c.clipPath(path); // 裁剪区域

Matrix matrix = new Matrix();// 不缩放
c.drawBitmap(bm, matrix, paint);// 把图画上去
super.setImageBitmap(dest);
 

}
}

public class MainActivity extends Activity {

private CircleImageView iv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv = (CircleImageView) findViewById(R.id.iv);
iv.setBorderWidth(15, Color.BLUE);// 设置边框
ImageLoader.getInstance().displayImage(bigBean.getData().get(position).getImg(),iv, MyApplication.getOptions());

}
}