Android拍照后获得的图片旋转90度问题

最近一直在做一个扫描的项目，用zxing实现二维码的扫描，需求要实现拍照并且扫描名片，发现拍照出来的照片是旋转的。一直找原因找不到，在国外一个论坛看到说是camera获取data数据是横向的，没有经过处理所以显示就是旋转的。想了好久还是不会实现data的旋转，索性就将bitmap进行旋转以达到正面显示的效果吧。下面看代码：

Camera.PictureCallback myJpegCallback = new Camera.PictureCallback() {
@Override
 public void onPictureTaken(byte[] data, Camera camera) {
        Bitmap bitmap_cc = BitmapFactory.decodeByteArray(data, 0, data.length);
 Matrix m = new Matrix();
 m.setRotate(90,(float) bitmap_cc.getWidth() / 2, (float) bitmap_cc.getHeight() / 2);
        final Bitmap bm = Bitmap.createBitmap(bitmap_cc, 0, 0, bitmap_cc.getWidth(), bitmap_cc.getHeight(), m, true);
        String name = new DateFormat().format("yyyyMMdd_hhmmss", Calendar.getInstance(Locale.CHINA)) + ".jpg";
        File file = new File("/storage/emulated/0/DCIM/Camera_scanning/");
        file.mkdirs();
        File newFile = new File(file, name);
        String fileName = "/storage/emulated/0/DCIM/Camera_scanning/" + name;
        try {
            FileOutputStream outputStream = new FileOutputStream(newFile);
            bm.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        Log.d("MainActivity", "data.length:" + data.length);
        Log.d("MainActivity", fileName);
    }
};