Android(安卓)圆角矩形ImageView

package sf.mobile.sf.widget;import android.annotation.SuppressLint;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;/** * 描述：圆角矩形ImageView * @author HJK */@SuppressLint("DrawAllocation")public class RoundRectImageView extends ImageView {public RoundRectImageView(Context context) {super(context);}public RoundRectImageView(Context context, AttributeSet attrs) {super(context, attrs);}public RoundRectImageView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}@SuppressLint("DrawAllocation")@Override      protected void onDraw(Canvas canvas) {          Drawable drawable = getDrawable();          if (drawable == null) {              return;          }            if (getWidth() == 0 || getHeight() == 0) {              return;           }          Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();          Bitmap b = getRoundBitmap(bitmap, 10);          final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());          final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());        canvas.drawBitmap(b, rectSrc, rectDest, null);      } /**     * 获取圆角矩形图片方法     * @param bitmap     * @param roundPx,一般设置成14     * @return Bitmap     */    private Bitmap getRoundBitmap(Bitmap bitmap, int radius) {          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 paint = new Paint();          paint.setAntiAlias(true);          canvas.drawARGB(0, 0, 0, 0);          paint.setColor(color);          int x = bitmap.getWidth();                 canvas.drawRoundRect(rectF, radius, radius, paint);        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));          canvas.drawBitmap(bitmap, rect, rect, paint);          return output;      }  }
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