Java tutorial
//package com.java2s; import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap rotateBitmap(Bitmap bmp, float rotation) { if (rotation == 0) { return bmp; } Matrix matrix = new Matrix(); matrix.postRotate(rotation); return Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true); } }