問題描述

服務參數:

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

當時我的Retrofit的API

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

案例 2.(我有問題的地方)與 @Body 類<UploadwithImage>

{
    "methodName":"submitLevel1Part2Icon",
    "userid":"150",
    "headerData":{
        "fiction":{
            "icon_type":"1",
            "icon_id":"3"},
        "nonfiction":{
            "icon_type":"2",
            "icon_id":"4"},
        "relation":{
            "icon_type":"3",
            "icon_id":"0",
            "name":"Ronak",
            "relative_image":"<File>",
            "relation_id":"3"},
        "self":{
            "icon_type":"4",
            "icon_id":"0"}
    }
}

我正在嘗試這個 API

 @Multipart
 @POST("webservice")
 Call<SubmitLevel1Part2IconResp> loadLevel1halfIconswithImage(@Part("description") RequestBody description, @Part MultipartBody.Part file, @Body UploadwithImage uploadImage);

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);

我不知道為什么，但它返回如下錯誤:

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

"@Body 參數不能與表單或多部分編碼一起使用"

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

我們將不勝感激.

推薦答案

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);

現在創建您的請求參數，

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，您可以簡單地將它們作為參數傳遞.檢查我的答案 https://stackoverflow.com/a/37052548/1320616 以獲取有關通過請求發送圖像文件的一些線索.

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.

這篇關于使用 @multipart 改造 @body 有問題的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！