Android Retrofit上传图片文件使用multipart请求

Question

我是 android retrofit 的新手，需要使用多部分请求格式上传图像文件。我能够使用 iphone 多部分请求成功上传。但是，在进行 android 改造时遇到了麻烦。我使用 https 和 token 持有者授权。

@Multipart
@POST("/Api/ApiSales/UploadImages")
void uploadImage(@Part("File") TypedFile file,
                      Callback<Response> callback);

RestAdapter.Builder builder = new RestAdapter.Builder().setEndpoint(appController.getInstance().getURL());
            builder.setRequestInterceptor(new RequestInterceptor() {
                @Override
                public void intercept(RequestFacade request) {
                    request.addHeader("Authorization", appController.getInstance().getAuthTokenString());
                }
            });
            builder.setLogLevel(RestAdapter.LogLevel.FULL);

            RestAdapter restAdapter = builder.build();

            RetrofitService service = restAdapter.create(RetrofitService.class);
            service.uploadImage(new TypedFile("image/png",toFile), new Callback<retrofit.client.Response>() {
                @Override
                public void success(retrofit.client.Response response, retrofit.client.Response response2) {
                    Log.i(TAG, response.toString());
                }

                @Override
                public void failure(RetrofitError error) {
                    Log.e(TAG, error.toString());
                }
            });

出现以下错误:

retrofit.RetrofitError: Write error: ssl=0x5ef8ad40: I/O error during system call, Connection reset by peer      

我为 http 请求设置了服务器，仍然有错误:

  retrofit.RetrofitError: sendto failed: ECONNRESET (Connection reset by peer)

Answer 1

我觉得你的界面应该是这样的

 @Multipart
    @POST("/Api/ApiSales/UploadImages") 
    void uploadImage(@Header("Authorization") String user, 
    @Part("File") TypedFile file, Callback<Response> callback);

你应该首先从 onActivityResult 获取你的真实图像路径

final String imagePath = getRealPathFromURI(imageUri);

getRealPathFromURI 将是这样的。

private String getRealPathFromURI(Uri contentUri) {
        String[] projection = {MediaStore.Images.Media.DATA};
        CursorLoader loader = new CursorLoader(this, contentUri, projection, null, null, null);
        Cursor cursor = loader.loadInBackground();
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String result = cursor.getString(column_index);
        cursor.close();
        return result;
    }

以及您的 TypedFile 的初始化

File photoFile = new File(imagePath);// image will be your real path
        String mimeType = getMimeType(imagePath);
        TypedFile photoTypedFile;
        if (mimeType != null) {
            photoTypedFile = new TypedFile(mimeType, photoFile);
        } else {
            photoTypedFile = new TypedFile("image/jpg", photoFile);
        }

除了添加 header 外，您的 Restadapter 初始化将是相同的，您的调用将是这样。

RetrofitService service = restAdapter.create(RetrofitService.class);
            service.uploadImage("yourAuthorization", photoTypedFil, new Callback<retrofit.client.Response>() {
                @Override
                public void success(retrofit.client.Response response, retrofit.client.Response response2) {
                    Log.i(TAG, response.toString());
                }

                @Override
                public void failure(RetrofitError error) {
                    Log.e(TAG, error.toString());
                }
            });