android获得圆角图片

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import com.loopj.android.image.SmartImageView;

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.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;

public class RoundSmartImageView extends SmartImageView {
private Paint paint;

public RoundSmartImageView(Context context) {    this(context, null);}public RoundSmartImageView(Context context, AttributeSet attrs) {    this(context, attrs, 0);}public RoundSmartImageView(Context context, AttributeSet attrs, int defStyle) {    super(context, attrs, defStyle);    paint = new Paint();}/** * * 绘制圆形图片 *  * @author caizhiming */@Overrideprotected void onDraw(Canvas canvas) {    Drawable drawable = getDrawable();    if (null != drawable) {        Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();        Bitmap b = getCircleBitmap(bitmap, 14);        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);    }}/** * * 获取圆形图片方法 *  * @param bitmap * @param pixels * @return Bitmap */private Bitmap getCircleBitmap(Bitmap bitmap, int pixels) {    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());    paint.setAntiAlias(true);    canvas.drawARGB(0, 0, 0, 0);    paint.setColor(color);    int x = bitmap.getWidth();    canvas.drawCircle(x / 2, x / 2, x / 2, paint);    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));    canvas.drawBitmap(bitmap, rect, rect, paint);    return output;}

}

xml中： <包名.view.RoundSmartImageView
android:id=”@+id/user_photo”
android:layout_width=”40dp”
android:layout_height=”40dp” />
.java文件中调用：
RoundSmartImageView mImageView = (RoundSmartImageView) convertView.findViewById(R.id.user_photo);
mImageView.setImageUrl(job.getImgUrl(),R.drawable.ic_launcher); //如果job.getImagUrl()为空，默认加载R.drawable.ic_launcher；

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