Circular Bitmaps in android

public static Bitmap cirucularImage(Bitmap bitmap) {
Bitmap circleBitmap = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Bitmap.Config.ARGB_8888);
BitmapShader shader = new BitmapShader(bitmap, TileMode.CLAMP,
TileMode.CLAMP);
Paint paint = new Paint();
paint.setShader(shader);

Canvas c = new Canvas(circleBitmap);
c.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
bitmap.getWidth() / 2, paint);

return circleBitmap;

}