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());    }}