android 如何用代码生成圆角Bitmap图片

有个项目中，需要把图片调整成圆角，怎么通过代码方式实现呢？请参阅下面的代码：

//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;}}

该方法主要用到了drawRoundRect来画圆角矩形，然后通过drawBitmap来画图片。

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