Android Retrofit 2文件上传 [英] Android Retrofit 2 file upload

问题描述

我正在使用Retrofit 2，我想调用一个Web服务将我的图像上传到我的服务器。服务器端我使用，我检查是否有文件上传。但我从来没有一个文件上传。我可以得到描述参数，但不是文件参数。

你能告诉我，如果我的android代码是好的吗？我不知道什么是错的。
$ b

ApplicationService

  public interface ApplicationService {
 
 ... 
 //我的其他web服务运行良好
 
 @Multipart 
 @POST / path / to / uploadPictures）
呼叫< ResponseBody>上传（@Part（description）RequestBody描述，
 @Part（file）RequestBody文件）; 
 
 $ b  

ServiceGenerator Class

  public class ServiceGenerator {
 
 public static final String API_BASE_URL = Globals.SERVER_NAME; 
 
 private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder（）; 
 
 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（））。build（）; 
 return retrofit.create（serviceClass）; 
 
 
 
 
 $ b 
 上传文件  
 
 
  private void uploadFile（String filename）{
 //创建上传服务客户$ b $ ApplicationService service = ServiceGenerator.createService（ApplicationService.class）; 
 
 File file = new File（this.getExternalFilesDir（Environment.DIRECTORY_PICTURES），filename）; 
 
 //从文件
创建RequestBody实例RequestBody requestFile = RequestBody.create（MediaType.parse（multipart / form-data），file）; 
 
 //在多部分请求中添加另一部分
字符串descriptionString =你好，这是描述说; 
 RequestBody description = RequestBody.create（MediaType.parse（multipart / form-data），descriptionString）; 
 
 //最后，执行请求
调用< ResponseBody> call = service.upload（description，requestFile）; 
 call.enqueue（new Callback< ResponseBody>（）{
 @Override 
 public void onResponse（Call< ResponseBody> call，
 Response< ResponseBody> response）{
 Log.v（Upload，success）; 
} 
 
 @Override 
 public void onFailure（Call< ResponseBody> call，Throwable t）{
 Log.e（Upload error：，t.getMessage（））; 
} 
}）; 
 
 $ / code $ 
 
 
解决方案 
而不是 @Part MultipartBody.Part file  
 
 
 
使用 @Part MultipartBody.Part file   
 
 
  File file = new File（getRealPathFromURI（data.getData（）））; 
 
 RequestBody requestFile = RequestBody.create（MediaType.parse（multipart / form-data），getRealPathFromURI（data.getData（）））; 
 
 MultipartBody.Part multipartBody = MultipartBody.Part.createFormData（file，file.getName（），requestFile）; 
  
 
I'm using Retrofit 2 and I want to call a web service to upload my images to my server. Server side i'm using Phalcon PHP and I check if I have a file to upload. But I have never a file to upload. I can get the description parameter but not the file parameter.

Could you tell me if my android code is ok ? I don't know what is wrong.

ApplicationService
public interface ApplicationService {

...
// My other web services works well

@Multipart
@POST("/path/to/uploadPictures")
Call<ResponseBody> upload(@Part("description") RequestBody description,
                          @Part("file") RequestBody file);

}
ServiceGenerator Class
public class ServiceGenerator {

public static final String API_BASE_URL = Globals.SERVER_NAME;

private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

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()).build();
    return retrofit.create(serviceClass);
}

}
Upload file calling
private void uploadFile(String filename) {
    // create upload service client
    ApplicationService service = ServiceGenerator.createService(ApplicationService.class);

    File file = new File(this.getExternalFilesDir(Environment.DIRECTORY_PICTURES), filename);

    // create RequestBody instance from file
    RequestBody requestFile = RequestBody.create(MediaType.parse("multipart/form-data"), file);

    // add another part within the multipart request
    String descriptionString = "hello, this is description speaking";
    RequestBody description = RequestBody.create(MediaType.parse("multipart/form-data"), descriptionString);

    // finally, execute the request
    Call<ResponseBody> call = service.upload(description, requestFile);
    call.enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call,
                               Response<ResponseBody> response) {
            Log.v("Upload", "success");
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            Log.e("Upload error:", t.getMessage());
        }
    });
}

解决方案
instead of @Part MultipartBody.Part file

use@Part MultipartBody.Part file
File file = new File(getRealPathFromURI(data.getData()));

RequestBody requestFile = RequestBody.create(MediaType.parse("multipart/form-data"), getRealPathFromURI(data.getData()));

MultipartBody.Part multipartBody =MultipartBody.Part.createFormData("file",file.getName(),requestFile);


                        
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