我在android上做了一个小应用，为照片添加时间戳，我有一个小问题

private void openCamera() {
    ContentValues values = new ContentValues();
    values.put(MediaStore.Images.Media.TITLE, "New picture");
    values.put(MediaStore.Images.Media.DESCRIPTION, "New picture");
    uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI , values);
    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT , uri);
    startActivityForResult(cameraIntent , IMAGE_CAPTURE_CODE);
}

当我点击按钮时，会调用opencamera。
一切都很好，照片保存在我的手机上，照片在我的imageview上

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        imageView.setImageURI(uri);
        Bitmap src = null;
        try {
            src = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888);
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:MM:ss");
        String dateTime = sdf.format(Calendar.getInstance().getTime()); // reading local time in the system
        Canvas cs = new Canvas(dest);
        Paint tPaint = new Paint();
        tPaint.setTextSize(100);
        tPaint.setColor(Color.BLUE);
        tPaint.setStyle(Paint.Style.FILL);
        // image qui est tourné , a changer et fini
        cs.drawBitmap(src, 0f, 0f, null);
        float height = tPaint.measureText("yY");
        cs.drawText(dateTime, 20f, height+15f, tPaint);
        try {
            dest.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(new File("/sdcard/timeStampedImage.jpg")));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

之后，在activityresult上，我想将时间戳添加到照片中。
保存图片时，除照片外，其他所有功能均正常：(
我不知道为什么，在代码上，旋转被修改了？
非常感谢您的帮助：）
例如：之前https://ibb.co/1nltjx5 之后https://ibb.co/l1mg1fj
新尝试

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        imageView.setImageURI(uri);
        Bitmap src = null;
        try {
            src = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);
        } catch (IOException e) {
            e.printStackTrace();
        }
        ExifInterface ei = null;
        try (InputStream inputStream = MainActivity.this.getContentResolver().openInputStream(uri)){
            ei = new ExifInterface(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION,
                ExifInterface.ORIENTATION_UNDEFINED);
        Bitmap rotatedBitmap = null;
        switch(orientation) {
            case ExifInterface.ORIENTATION_ROTATE_90:
                rotatedBitmap = rotateImage(src, 90);
                break;
            case ExifInterface.ORIENTATION_ROTATE_180:
                rotatedBitmap = rotateImage(src, 180);
                break;
            case ExifInterface.ORIENTATION_ROTATE_270:
                rotatedBitmap = rotateImage(src, 270);
                break;
            case ExifInterface.ORIENTATION_NORMAL:
            default:
                rotatedBitmap = src;
        }
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:MM:ss");
        String dateTime = sdf.format(Calendar.getInstance().getTime()); // reading local time in the system
        Canvas cs = new Canvas(rotatedBitmap);
        Paint tPaint = new Paint();
        tPaint.setTextSize(100);
        tPaint.setColor(Color.BLUE);
        tPaint.setStyle(Paint.Style.FILL);
        // image qui est tourné , a changer et fini
        cs.drawBitmap(src, 0f, 0f, null);
        float height = tPaint.measureText("yY");
        cs.drawText(dateTime, 20f, height+15f, tPaint);
        try {
            rotatedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(new File("/sdcard/timeStampedImage.jpg")));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
  public static Bitmap rotateImage(Bitmap source, float angle) {
    Matrix matrix = new Matrix();
    matrix.postRotate(angle);
    return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(),
            matrix, true);
}

我用collabor的链接进行了修改，并创建了一个带有uri源方向的位图
现在结果。。。图片分为两部分（好方向和坏方向）：（https://ibb.co/c9495pl