How to flip a bitmap image in android?

 How to flip a bitmap image in android? We can use matrix to do it.

public Bitmap flipBitmap(Bitmap bitmap) {       Bitmap bitmap = new Bitmap();     matrix.setScale(-1,1);     Bitmap bitmapRes = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),         bitmap.getHeight(),matrix,true);     return bitmapRes; }

It's easy to mirror a bitmap image.