解决上传图像后加载图片旋转的错向

 /**
     * 从给定的路径加载图片，并指定是否自动旋转方向
     */
    public static Bitmap loadBitmap(String imgpath ){

        Bitmap bm =  BitmapFactory.decodeFile(imgpath);
        int digree = 0;
        ExifInterface exif = null;
        try {
            exif = new ExifInterface(imgpath);
        } catch (IOException e) {
            e.printStackTrace();
            exif = null;
        }
        if (exif != null) {
// 读取图片中相机方向信息
            int ori = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,
                    ExifInterface.ORIENTATION_UNDEFINED);
// 计算旋转角度
            switch (ori) {
                case ExifInterface.ORIENTATION_ROTATE_90:
                    digree = 90;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    digree = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    digree = 270;
                    break;
                default:
                    digree = 0;
                    break;
            }
        }
        if (digree != 0) {
// 旋转图片
            Matrix m = new Matrix();
            m.postRotate(digree);
            bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                    bm.getHeight(), m, true);
        }
        return bm;


    }