自定义圆形imageView

5、

【ImageView】自定义ImageView系列（一）——简单圆形图片

/**

 * 自定义的圆形ImageView，可以直接当组件在布局中使用。

 * @author caizhiming

 *

 */

public class CircleImageView extends ImageView{

    private Paint paint ;

    publicCircleImageView(Context context) {

        this(context,null);

    }

 

    publicCircleImageView(Context context, AttributeSet attrs) {

        this(context,attrs,0);

    }

 

    publicCircleImageView(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs,defStyle);

        paint = new Paint();

 

    }

 

    /**

     * 绘制圆形图片

     * @author caizhiming

     */

    @Override

    protected voidonDraw(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 RectrectDest = 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

     * @author caizhiming

     */

    private BitmapgetCircleBitmap(Bitmap bitmap, int pixels) {

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

               bitmap.getHeight(), Config.ARGB_8888);

        Canvas canvas = newCanvas(output);

        final int color =0xff424242;

        final Rect rect = newRect(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(newPorterDuffXfermode(Mode.SRC_IN));

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

        return output;

    }

}

（2）定义一个imageView;

<com.yztc.CircleImageUtils.CircleImageView

           android:id="@+id/img_Anli_facePic"

           android:layout_width="80dp"

           android:layout_height="80dp"

           android:src="@mipmap/person1"

           android:layout_marginBottom="35dp"

           android:layout_marginRight="30dp"

           android:layout_gravity="right|bottom" />

6、