Java tutorial
//package com.java2s; //License from project: Apache License import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { /** * Method to flip vertically a Bitmap. * * @param source The original Bitmap. * @return The flipped Bitmap. */ public static Bitmap flipVertically(Bitmap source) { Matrix m = new Matrix(); m.preScale(1, -1); return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), m, false); } }