package com.wechaotou.utils;

 import android.content.Context;

 import android.graphics.Bitmap;

 import android.graphics.Bitmap.Config;

 import android.graphics.Canvas;

 import android.graphics.Paint;

 import android.graphics.PorterDuff.Mode;

 import android.graphics.PorterDuffXfermode;

 import android.graphics.Rect;

 import android.graphics.RectF;

 import android.graphics.drawable.BitmapDrawable;

 import android.graphics.drawable.Drawable;

 import android.util.AttributeSet;

 import android.widget.ImageView;

 /**

  * 自定义的圆角矩形ImageView，可以直接当组件在布局中使用。

  * @author caizhiming

  *

  */

 public class XCRoundRectImageView extends ImageView {

     private Paint paint;

     public XCRoundRectImageView(Context context) {

         this(context,null);

     }

     public XCRoundRectImageView(Context context, AttributeSet attrs) {

         this(context, attrs,0);

     }

     public XCRoundRectImageView(Context context, AttributeSet attrs, int defStyle) {

         super(context, attrs, defStyle);

         paint  = new Paint();

     }

     /**

      * 绘制圆角矩形图片

      * @author caizhiming

      */

     @Override

     protected void onDraw(Canvas canvas) {

         Drawable drawable = getDrawable();

         if (null != drawable) {

             Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();

             Bitmap b = getRoundBitmap(bitmap, 20);

             final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());

             final Rect rectDest = new Rect(0,0,getWidth(),getHeight());

             paint.reset();

            canvas.drawBitmap(b, rectSrc, rectDest, paint);

         } else {

             super.onDraw(canvas);

         }

     }

     /**

      * 获取圆角矩形图片方法

      * @param bitmap

      * @param roundPx,一般设置成14

      * @return Bitmap

      * @author caizhiming

      */

     private Bitmap getRoundBitmap(Bitmap bitmap, int roundPx) {

         Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),

                 bitmap.getHeight(), Config.ARGB_8888);

         Canvas canvas = new Canvas(output);

         final int color = 0xff424242;

         final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

         final RectF rectF = new RectF(rect);

         paint.setAntiAlias(true);

         canvas.drawARGB(0, 0, 0, 0);

         paint.setColor(color);

         int x = bitmap.getWidth();

         canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

         paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));

         canvas.drawBitmap(bitmap, rect, rect, paint);

         return output;

     }

 }

        <com.wechaotou.utils.XCRoundRectImageView

            android:id="@+id/image_head"

            android:layout_width="77dp"

            android:layout_height="77dp"

            android:layout_marginLeft="20dp"

            android:layout_marginTop="68dp"

            android:gravity="center_vertical"

            android:src="@drawable/text_order" />