FileOutputStream不会保存URI中的照片

Question

我正在尝试从图库中获取图像，并将其保存到应用程序中的私人位置以供其他使用。我可以确认是否从图库中收到了位图（可以在活动中设置图像视图），但是在其他活动中无法访问该图像。我相信我的FileOutputStream做错了。有什么想法吗？

Uri photoURI = data.getData();
            Bitmap imageBitmap;

            //Full Size
            BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
            try {
                imageBitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), photoURI);
                bitmapOptions.inJustDecodeBounds = true;

                //Compress
                ByteArrayOutputStream photoStream = new ByteArrayOutputStream();

                imageBitmap.compress(Bitmap.CompressFormat.JPEG, 50,photoStream);


                picPreview.setImageBitmap(imageBitmap);

                //Save to DB

                FileOutputStream fileOutputStream = new FileOutputStream(photoFile);
                fileOutputStream.write(photoStream.toByteArray());
                fileOutputStream.flush();
                fileOutputStream.close();

            }catch (IOException ex) {
                // Error occurred while creating the File
                Toast.makeText(
                        getApplicationContext(),
                        R.string.error_photo_file,
                        Toast.LENGTH_LONG).show();
            }

这是调用意图并创建“ PhotoFile”的函数。

   private void ChoosePictureIntent(){
        try {
            photoFile = createImageFile();
            //Save path
            wordPhotoDIR = photoFile.getAbsolutePath();

            thumbnailFile = createImageFile();
            //Save path
            ThumbnailDIR = thumbnailFile.getAbsolutePath();
        } catch (IOException ex) {
            // Error occurred while creating the File
            Toast.makeText(
                    getApplicationContext(),
                    R.string.error_photo_file,
                    Toast.LENGTH_LONG).show();
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {

            Uri photoURI = FileProvider.getUriForFile(this,
                    "com.example.android.roomwordsample.fileprovider",
                    photoFile);

            Intent ChoosePictureIntent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(ChoosePictureIntent, REQUEST_IMAGE_CHOOSE);
        }
    }