Java tutorial
//package com.java2s; import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap GetMirror(Bitmap bm) { if (bm == null) return null; float[] mirrorM = { -1, 0, 0, 0, 1, 0, 0, 0, 1 }; Matrix m = new Matrix(); m.setValues(mirrorM); return Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), m, false); } }