Java 如何获取当前登录的用户id，并使用Mysql数据库将该id作为数据上传到Android中

我想让当前用户登录到存储在共享首选项中的用户id，然后将该id作为数据或带有照片的信息插入Mysql数据库中的另一个表中

我已经尝试了很多方法来获取当前登录的用户id，然后将其作为带有照片的数据上传。我尝试在调试器中查找错误，但调试器未显示任何预期错误

这是我的Java代码

public void uploadMultipart() {
        //getting name for the image

        //getting the actual path of the image
        String path = getPath(filePath);

        //Uploading code
        try {
            String uploadId = UUID.randomUUID().toString();

            CA_SIGNUP_GTST user = SharedPrefManager.getInstance(UploadDOC_Activity.this).getUser();

            int id = user.getId();

            //Creating a multi part request
            new MultipartUploadRequest(UploadDOC_Activity.this, uploadId, UPLOAD_URL)
                    .addFileToUpload(path,"adhar_card") //Adding file
                    .addParameter("expid", String.valueOf(id))
                    .setNotificationConfig(new UploadNotificationConfig())
                    .setMaxRetries(2)
                    .startUpload(); //Starting the upload

        } catch (Exception exc) {
            Toast.makeText(this, exc.getMessage(), Toast.LENGTH_SHORT).show();
        }
    }


    //handling the image chooser activity result
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
            filePath = data.getData();
            try {
                bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                iv_adhar.setImageBitmap(bitmap);

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    //method to get the file path from uri
    public String getPath(Uri uri) {
        Cursor cursor = getContentResolver().query(uri, null, null, null, null);
        cursor.moveToFirst();
        String document_id = cursor.getString(0);
        document_id = document_id.substring(document_id.lastIndexOf(":") + 1);
        cursor.close();

        cursor = getContentResolver().query(
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                null, MediaStore.Images.Media._ID + " = ? ", new String[]{document_id}, null);
        cursor.moveToFirst();
        String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        cursor.close();

        return path;
    }


    //Requesting permission
    private void requestStoragePermission() {
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED)
            return;

        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)) {
            //If the user has denied the permission previously your code will come to this block
            //Here you can explain why you need this permission
            //Explain here why you need this permission
        }
        //And finally ask for the permission
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSION_CODE);
    }


    //This method will be called when the user will tap on allow or deny
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

        //Checking the request code of our request
        if (requestCode == STORAGE_PERMISSION_CODE) {

            //If permission is granted
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Displaying a toast
                Toast.makeText(this, "Permission granted now you can read the storage", Toast.LENGTH_LONG).show();
            } else {
                //Displaying another toast if permission is not granted
                Toast.makeText(this, "Oops you just denied the permission", Toast.LENGTH_LONG).show();
            }
        }
    }
}

我希望将上载，但当我运行应用程序时，它不会显示任何错误，并且用户id和图像也不会插入数据库