使用 @multipart 改造 @body 有问题

Retrofit @body with @multipart having Issue(使用 @multipart 改造 @body 有问题)
本文介绍了使用 @multipart 改造 @body 有问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

服务参数:

{"id":"1","name":"vishal","image/file":""} 

当时我的RetrofitAPI

@Multipart
@POST("webservice")
Call<SignUpResp> loadSignupMultipart(@Part("description") RequestBody description, @Part MultipartBody.Part file, @QueryMap HashMap<String, String> params);

Java端

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

     // MultipartBody.Part is used to send also the actual filename
     MultipartBody.Part body =  MultipartBody.Part.createFormData("methodName[headerData][relation][relative_image]", fileUpload.getName(), requestFile);

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

    call = service.loadLevel1halfIconswithImage(description, body, levelOneHalfIcons);

我不知道为什么,但它返回如下错误:

I don't know why but it returns error like:

"@Body 参数不能与表单或多部分编码一起使用"

"@Body parameters cannot be used with form or multi-part encoding"

我们将不胜感激.

推荐答案

把你的方法改成

@Multipart
@POST("users/{id}/user_photos")
Call<models.UploadResponse> uploadPhoto(@Path("id") int userId, @PartMap Map<String, RequestBody> params);

现在创建您的请求参数,

Now to create your request parameters,

//All the String parameters, you have to put like
Map<String, RequestBody> map = new HashMap<>();
map.put("methodName", toRequestBody(methodName));
map.put("userid", toRequestBody(userId));
map.put("relation", toRequestBody(relation));
map.put("icon_type", toRequestBody(iconType));
map.put("icon_id", toRequestBody(iconId));
map.put("name", toRequestBody(name));
map.put("relation_id", toRequestBody(relationId));

//To put your image file you have to do
File file = new File("file_name");
RequestBody fileBody = RequestBody.create(MediaType.parse("image/png"), file);
map.put("relative_image"; filename="some_file_name.png"", fileBody);

// This method  converts String to RequestBody
public static RequestBody toRequestBody (String value) {
    RequestBody body = RequestBody.create(MediaType.parse("text/plain"), value);
    return body ;
}

//To send your request
call = service.loadLevel1halfIconswithImage(description, params);

如果您不想使用 PartMap,您可以简单地将它们作为参数传递.检查我的答案 https://stackoverflow.com/a/37052548/1320616 以获取有关通过请求发送图像文件的一些线索.

In case you do not want to use PartMap, you can simply pass them as parameters. Check my answer https://stackoverflow.com/a/37052548/1320616 to get some clue on sending image file with request.

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