android - 改造 - 抛出异常 java.lang.IllegalArgumentException : Only one encoding annotation is allowed

Question

大家好，这是我的示例代码

@FormUrlEncoded
@Multipart
@POST("registration.php")
Call<Signup> getSignupResponse(@Field("email") String email,
                               @Field("lname") String lname,
                               @Field("fname") String fname,
                               @Field("password") String password,
                               @Part("filename") File file);

问题是，当我尝试将文件参数添加为一个部分时，如果我只使用@Field，它会向我抛出一个错误，它工作得很好，但在我向其中添加@Part 后却无法工作
- 有没有办法在 Retrofit 中同时使用@Field 和@part？
- 如果是，请告诉我原因，如果不是，请告诉我正确的方法

非常感谢您的回答，并提前感谢您

注意:投票前请在评论中告诉我建议。

Answer 1

You cannot use both @FormUrlEncoded and @Multipart on a single method. An HTTP request can only have one Content-Type and both of those are content types.

@FormUrlEncoded (for android) | application/x-www-form-urlencoded(for web)

@Multipart (for android) | multipart/form-data(for web)

像这样使用......

  @Multipart
    @POST("photos/upload")
    Call<Result> upload(@Part("Token") RequestBody token, @Part("Photo_Type") RequestBody type, @Part MultipartBody.Part  file );

然后像这样通话......

String token="your string";

File file = new File(path);
RequestBody tokenRequest = RequestBody.create(MediaType.parse("text/plain"), token);
RequestBody type = RequestBody.create(MediaType.parse("text/plain"), true + "");

MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), RequestBody.create(MediaType.parse("image/*"), file));



  Call<Result> call = qikGrubApi.upload(tokenRequest, type, filePart);

        call.enqueue(new Callback<Result>() {
            @Override
            public void onResponse(Call<Result> call, Response<Result> response) {
                progress.dismiss();
                if (response.isSuccessful()) {
                    if (response.body().getSuccess()) {
                        nextPage(response.body().getMessage());
                    } else
                        Toast.makeText(UploadActivity.this, response.body().getMessage(), Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(UploadActivity.this, "Sorry for inconvince server is down", Toast.LENGTH_SHORT).show();
                }
            }

            @Override
            public void onFailure(Call<Result> call, Throwable t) {
                progress.dismiss();
                Toast.makeText(UploadActivity.this, "Check your Internet connection", Toast.LENGTH_SHORT).show();
            }
        });
    }

注意:- 将上面的示例用于您的文件 POST，如果您卡在任何地方，请告诉我。

有关详细信息，请单击 this

编辑:-

对于你的情况，像这样使用......

    @Multipart
@POST("registration.php")
Call<Signup> getSignupResponse(@Part("email") RequestBody email,
                               @Part("lname") RequestBody lname,
                               @Part("fname") RequestBody fname,
                               @Part("password") RequestBody password,
                               @Part MultipartBody.Part filename);

并像这样使用改造调用......

 File file = new File(path);
    RequestBody emailRequest = RequestBody.create(MediaType.parse("text/plain"), email);
    RequestBody lnameRequest = RequestBody.create(MediaType.parse("text/plain"), lname);
    RequestBody fnameRequest = RequestBody.create(MediaType.parse("text/plain"), fname);
    RequestBody passwordRequest = RequestBody.create(MediaType.parse("text/plain"), password);

    MultipartBody.Part filePart = MultipartBody.Part.createFormData("file", file.getName(), RequestBody.create(MediaType.parse("image/*"), file));



      Call<Signup> call = qikGrubApi.upload(emailRequest, lnameRequest ,fnameRequest , passwordRequest, filePart);

            call.enqueue(new Callback<Signup>() {
                @Override
                public void onResponse(Call<Signup> call, Response<Signup> response) {
                    progress.dismiss();
                    if (response.isSuccessful()) {
                        if (response.body().getSuccess()) {
                            nextPage(response.body().getMessage());
                        } else
                            Toast.makeText(UploadActivity.this, response.body().getMessage(), Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(UploadActivity.this, "Sorry for inconvince server is down", Toast.LENGTH_SHORT).show();
                    }
                }

                @Override
                public void onFailure(Call<Signup> call, Throwable t) {
                    progress.dismiss();
                    Toast.makeText(UploadActivity.this, "Check your Internet connection", Toast.LENGTH_SHORT).show();
                }
            });
        }

Example