Android生成带圆角的Bitmap图片

//生成圆角图片public static Bitmap GetRoundedCornerBitmap(Bitmap bitmap) { try {  Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),    bitmap.getHeight(), Config.ARGB_8888);  Canvas canvas = new Canvas(output);      final Paint paint = new Paint();  final Rect rect = new Rect(0, 0, bitmap.getWidth(),    bitmap.getHeight());    final RectF rectF = new RectF(new Rect(0, 0, bitmap.getWidth(),    bitmap.getHeight()));  final float roundPx = 14;  paint.setAntiAlias(true);  canvas.drawARGB(0, 0, 0, 0);  paint.setColor(Color.BLACK);    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  final Rect src = new Rect(0, 0, bitmap.getWidth(),    bitmap.getHeight());  canvas.drawBitmap(bitmap, src, rect, paint);   return output; } catch (Exception e) {    return bitmap; }}