RTEditor/src/main/java/com/onegravity/rteditor/media/crop/CropImageActivity.java
private Bitmap rotateImage(Bitmap src, float degree) {
        // create new matrix
        Matrix matrix = new Matrix();
        // setup rotation degree
        matrix.postRotate(degree);
        Bitmap bmp = Bitmap.createBitmap(src, 0, 0, src.getWidth(),
                src.getHeight(), matrix, true);
        return bmp;
    }
private Bitmap rotateImage(Bitmap src, float degree) {
        // create new matrix
        Matrix matrix = new Matrix();
        // setup rotation degree
        matrix.postRotate(degree);
        Bitmap bmp = Bitmap.createBitmap(src, 0, 0, src.getWidth(),
                src.getHeight(), matrix, true);
        return bmp;
    }
Thong added for rotate