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