安卓：无法使用改装2.0.0 Beta 2中上传多部分图像文件 [英] Android : Unable to upload multipart Image file using Retrofit 2.0.0 beta 2

问题描述

我无法用改装2.0.0-β2上传的图像。
它给我图片丢失的错误。虽然我检查该文件存在于系统中，也是，如果我表现出它是正确显示图像视图。

Hi I am unable to upload an image using retrofit 2.0.0-beta2. It gives me "Image missing" error. Although I checked that file exist in system and also if I show in an Image view it is showing properly.

的URL，它需要上传： http://mywebsite.com /签名/上传/

所以我的BASE_URL是= http://mywebsite.com/

So my BASE_URL is = http://mywebsite.com/

我的 .gradle 文件中有这样的：

compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'
compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'
compile 'com.squareup.okhttp:logging-interceptor:2.6.0'

SeriveGenerator.java 类

public class ServiceGenerator {

public static final String API_BASE_URL = Urls.URL_BASE;

private static OkHttpClient httpClient = new OkHttpClient();



private static Retrofit.Builder builder =
        new Retrofit.Builder()
                .baseUrl(API_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create());

public static <S> S createService(Class<S> serviceClass) {
    Retrofit retrofit = builder.client(httpClient).build();
    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    httpClient.interceptors().add(interceptor);
    return retrofit.create(serviceClass);
}

}

UploadService.java 类

public interface UploadService {
@Multipart
@POST("/signature/upload/")  
// Tried to change this to "/signature/upload" as well (no slash in end)
// then gives Method not allowed error"
Call<String> upload(
        @Part("image") RequestBody file,
        @Part("image_name") String name);
}

终于在我的Andr​​oid活动

And finally in my android activity

// photoFile is the file, checked that it exist in system and 
// path is also correct

public void uploadFileToServer() {
    UploadService service =
            ServiceGenerator.createService(UploadService.class);

    String name = "xyz.jpg";

    RequestBody requestBody =
            RequestBody.create(MediaType.parse("multipart/form-data"), photoFile);

    Call<String> call = service.upload(requestBody, name);
    call.enqueue(new Callback<String>() {
        @Override
        public void onResponse(Response<String> response, Retrofit retrofit) {

            Log.v("Upload", "success");
        }

        @Override
        public void onFailure(Throwable t) {
            Log.e("Upload", t.getMessage());
        }
    });
}

所以我得到的成功来自活动，但在服务器上文件中记录的成功是不存在的，使用邮差，我试图手动上传的图片中表单数据，是被正确上传

So I am getting success log "success" from activity but on server file is not there, using Postman, I tried manually upload the image in form data, is gets uploaded correctly.

推荐答案

我前几天遇到了类似的问题。这里说到我的工作code。

I faced a similar problem a few days ago. Here comes my working code.

首先，你必须定义接口。不添加的内容类型头是非常重要的。
在下面可以看到 @part（图片\\; 图片是对应的名称，后端预期（对我来说），所以你不得不这样做。更改此名称，使其与您的后端工作。文件名= \\图片\\只是定义了你上传的图片的名称。
在我的情况的方法是在DiaryService.java。

At first you have to define the Interface. It is very important NOT to add a content type header. In the following you see the @Part("picture\"; the "picture" is the corresponding name, that the Backend expects (in my case). So you have to change this name to make it work with your Backend. The filename=\"image\" just defines the name of your uploaded image. In my case the method is in the "DiaryService.java".

    @Multipart
    @POST("signature/upload")
    public Call<Void> addImageElementToDiary(@Part("picture\"; filename=\"image\" ") RequestBody picture,
                                             @Part("sort") RequestBody sort);

现在您可以拨打上述定义的服务。重要的是要正确分析的MediaType是非常重要的。你用的multipart / form-data的，这并没有我的情况下工作。您应该在以下Mediatypes看看。

Now you can call the above defined Service. It is important to parse the Mediatype correctly. You used "multipart/form-data", this did not work in my case. You should take a look at the following Mediatypes.

    File file = new File(((CreateDiaryImage) element).getImagePath());

        RequestBody sort = RequestBody.create(MediaType.parse("text/plain"), element.getSort() + "");

        RequestBody requestBody =
                RequestBody.create(MediaType.parse("image/*"), file);

        Call<Void> call = diaryService.addImageElementToDiary(requestBody, sort);
        call.enqueue(new Callback<Void>() {
            @Override
            public void onResponse(Response<Void> response, Retrofit retrofit) {
                Log.v("Upload", "success");
            }

            @Override
            public void onFailure(Throwable t) {
                Log.e("Upload", t.getMessage());
            }
        });

这篇关于安卓：无法使用改装2.0.0 Beta 2中上传多部分图像文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！