Method gray

src/com/cloudream/ishow/util/BitmapUtils.java:776–787

turn true color image into gray image. @param image @return gray image, format ARGB_8888 as before.

(Bitmap image)

	 * @return gray image, format ARGB_8888 as before.
	 */
	public Bitmap gray(Bitmap image)
	{
		Bitmap result = Bitmap.createBitmap(image.getWidth(), image.getHeight(), Bitmap.Config.ARGB_8888);
		Canvas canvas = new Canvas(result);
		Paint paint = new Paint();
		ColorMatrix transform = new ColorMatrix();
		transform.setSaturation(0);
		ColorMatrixColorFilter filter = new ColorMatrixColorFilter(transform);
		paint.setColorFilter(filter);
		canvas.drawBitmap(image, 0, 0, paint);
		return result;
	}

	// convert View to Bitmap, it can be archived to SD card later.
	public static Bitmap getBitmapFromView(View view)