[Android]生成圆角Bitmap

public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {

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

        bitmap.getHeight(), Config.ARGB_8888);

    Canvas canvas = new Canvas(output);

 

    final int color = 0xff424242;

    final Paint paint = new Paint();

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

    final RectF rectF = new RectF(rect);

    final float roundPx = 12;

 

    paint.setAntiAlias(true);

    canvas.drawARGB(0, 0, 0, 0);

    paint.setColor(color);

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

 

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

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

 

    return output;

  }