如何使用 Retrofit android 将 JSON 数据作为正文发送

Question

我正在尝试在服务器上的 JSON 数组下方发布。

{
    "order": [{
            "orderid": "39",
            "dishid": "54",
            "quantity": "4",
            "userid":"2"
        },{
            "orderid": "39",
            "dishid": "54",
            "quantity": "4",
            "userid":"2"
        }]

}

我在下面使用这个：

private void updateOreder() {

    M.showLoadingDialog(GetDishies.this);
    UpdateAPI mCommentsAPI = APIService.createService(UpdateAPI.class);

    mCommentsAPI.updateorder(jsonObject, new Callback<String>() {
        @Override
        public void success(String s, Response response) {
            M.hideLoadingDialog();
            Log.e("ssss",s.toString());
            Log.e("ssss", response.getReason());
        }

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

    });

}

我遇到以下错误：

 retrofit.RetrofitError: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 2 column 6 path $

更新API代码：

@POST("updateorder.php")
    void updateorder(@Body JSONObject object,Callback<String>());

谁能告诉我我的错误？

提前致谢

Answer 1

创建订单请求类

public class OrderRequest {

@SerializedName("order")
public List<Order> orders;
}

创建订单类

    public class Order {

    @SerializedName("orderid")
    public String Id;
}

端点

public interface ApiEndpoint{
  @POST("order")
  Call<String> createOrder(@Body OrderRequest order, @HeaderMap HashMap<String,String> headerMap);
}

在调用服务的mainActivity中使用这种类型的实现

HashMap hashMap= new HashMap();
    hashMap.put("Content-Type","application/json;charset=UTF-8");

OrderRequest orderRequest = new OrderRequest();
List<Orders> orderList = new ArrayList();

Orders order = new Order();
order.Id = "20";
orderList.add(order);
//you can add many objects

orderRequest.orders = orderList;

Call<String> dataResponse= apiEndPoint.createOrder(orderRequest,hashMap)
dataResponse.enqueue(new Callback<String>() {
        @Override
        public void onResponse(Call<String> call, Response<String> response) {
            try{

            }catch (Exception e){

            }
        }   

在 createOrder 方法中，我们不需要将对象转换为 Json。因为当我们构建改造时，我们将转换器工厂添加为 GsonConverterFactory。它会自动将该对象转换为 JSON

 retrofit = new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();

Answer 2

尝试将您的代码修改为 Retrofit 2

compile 'com.squareup.retrofit2:retrofit:2.0.0'
compile 'com.squareup.retrofit2:converter-gson:2.0.0'

您的服务：

@POST("updateorder.php")
Call<String> updateorder(@Body JsonObject object);

调用改造

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl(RetrofitService.baseUrl)
        .addConverterFactory(GsonConverterFactory.create())
        .build();

使用 GSON 传递您的 Json：

JsonObject postParam = new JsonObject
postParam.addProperty("order",yourArray) ;

最后：

Call<String> call = retrofitService.updateorder(postParam);


    call.enqueue(new Callback<String>() {
         @Override
         public void onResponse(Call<String>callback,Response<String>response) {
            String res = response.body();
         }
            @Override
            public void onFailure(Call<String> call, Throwable t) {

            }
    });

希望对你有所帮助。

Answer 3

If you want to post a JSON request using Retrofit then there are two methods to follow.

1. Option one - Seraialized Object
Create a serializable object(In simple terms convert your JSON object into a class) and post it using Retrofit.
If you don't know how to do it use this URL to 

将您的 JSON 对象转换为 jsonschema2pojo 类

Example : Lets say in your case JSon object class name is Order. 

然后你必须在类中定义与 JSon 结构匹配的变量。（由 [] 定义的内部块是一个对象数组）。而且你必须定义 getter 和 setter（我没有在此处包含它们以节省间距）

public class Order implements Serializable{
private List<Order> order = null; //Include getters and setters
}

2. Option Two - Raw json (I prefer this one)
Create a JsonObject object and pass it (Remember not a JSONObject. Though both appears to be the same there is a distinct difference between them. Use exact same characters)

JsonObject bodyParameters = new JsonObject();
JsonArray details= new JsonArray();
JsonObject orderData= new JsonObject();
orderData.addProperty("orderid", "39");//You can parameterize these values by passing them
orderData.addProperty("dishid", "54");
orderData.addProperty("quantity", "4");
orderData.addProperty("userid", "2");
details.add(orderData)
bodyParameters.add("order", details);

Create Retrofit instance
retrofit = new Retrofit.Builder()
                    .baseUrl(baseURL)
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(okHttpClient)
                    .build();

Retrofit Service(You have to create a service class and define instance)
@POST("<Your end point>")
Call<ResponseObject> updateOrder(@Body JsonObject bodyParameters);

Request Call
Call<ResponseObject> call = postsService.updateOrder(bodyParameters);
//postsService is the instance name of your Retrofit Service class

Answer 4

使用改造版本 2

compile 'com.squareup.retrofit2:retrofit:2.0.0'
compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'

1. 创建与您将发送到服务器的 JSON 结构相对应的 POJO 类：

    public class RequestBody {
         private List<InnerClass> order;
   
         public RequestBody(List<InnerClass> order) {
            this.order = order;
         }
   
         public class InnerClass{
              private int orderid, dishid, quantity, userid;
   
              public InnerClass(int orderid, int dishid, int quantity, int userid) {
                this.orderid = orderid;
                this.dishid = dishid;
                this.quantity = quantity;
                this.userid = userid;
            }
            public int getOrderId() { return orderid; }
            public int getDishId() { return dishid; }
            public int getQuantity() { return quantity; }
            public int getUserId() { return userid; }
         }
    }
   

   1. 创建一个服务生成器类来初始化你的 Retrofic 对象实例：

       public class ServiceGenerator {
      
        private static OkHttpClient okHttpClient = new OkHttpClient();
      
         public static <S> S createService(Class<S> serviceClass) {
         Retrofit.Builder builder = new Retrofit.Builder()
                                 .baseUrl(AppConfig.BASE_URL)
                                   .addConverterFactory(GsonConverterFactory.create());
        Retrofit retrofit = builder.client(okHttpClient).build();
      
        return retrofit.create(serviceClass);
      }
      

2. 创建应该包含“updateorder”方法的api服务接口：

   public interface ApiService {
       @POST("updateorder.php")
       Call<your POJO class that corresponds to your server response data> updateorder(@Body RequestBody object);
   }
   

4.在您的 Activity 或 Fragment 中，您希望在其中填写您的 Json 数据并初始化 ApiService：

ArrayList<RequestBody.InnerClass> list = new List<>();
list.add(new RequestBody.InnerClass(39, 54, 4, 2));
list.add(new RequestBody.InnerClass(39, 54, 4, 2));
RequestBody requestBody = new RequestBody(list);

     ApiService apiService =    ServiceGenerator.createService(ApiService.class);
   Call<your POJO class that corresponds to your server response data> call = apiService.updateorder(requestBody);
//use enqueue for asynchronous requests 
call.enqueue(new Callback<your POJO class that corresponds to your server response data>() {

   public void onResponse(Response<> response, Retrofit retrofit) {
         M.hideLoadingDialog();
        Log.e("ssss",s.toString());
        Log.e("ssss", response.getReason());
   }

   public void onFailure(Throwable t) {
           M.hideLoadingDialog();
           Log.e("error",t.toString());
        }
}