使用 POST Body with Form-Data in Android 调用时改造不返回 JSON 对象

Question

我目前正在开发一个 Android 应用程序，其中我正在使用 Retrofit 访问具有 POST 表单数据的 API。 API 在 POSTMAN 中工作正常，但在 Android 中它给出了一个错误

java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1 path $

请指出我哪里做错了。提前致谢。

我的改装代码

    long date = System.currentTimeMillis();

    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd", Locale.US);
    String dateString = sdf.format(date);

    Gson gson = new GsonBuilder()
            .setLenient()
            .create();
    if (retrofit == null) {
        retrofit = new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create(gson))
                .build();
    }
    dataArrayList = new ArrayList<>();

    SapRevenueService revenueApiService = retrofit.create(SapRevenueService.class);
    Call<List<SapRevenue>> call = revenueApiService.getData(String.valueOf(dateString));
    call.enqueue(new Callback<List<SapRevenue>>() {

        @Override
        public void onResponse(@NotNull Call<List<SapRevenue>> call, @NotNull Response<List<SapRevenue>> response) {
            dataArrayList = response.body();
            Log.d(TAG, "Number of records received: " + dataArrayList.size());
        }

        @Override
        public void onFailure(@NotNull Call<List<SapRevenue>> call, @NotNull Throwable throwable) {
            Log.e(TAG, throwable.toString());
        }
    });

我的POJO

public class SapRevenue 实现可序列化、可比较{

public String locationCode, arrearCollection, currentCollection, arrearDemand, currentDemand, unitsBilled;

public SapRevenue(String locationCode, String asOndate, String arrearCollection, String currentCollection, String arrearDemand, String currentDemand, String unitsBilled) {
    this.locationCode = locationCode;

    this.arrearCollection = arrearCollection;
    this.currentCollection = currentCollection;
    this.arrearDemand = arrearDemand;
    this.currentDemand = currentDemand;
    this.unitsBilled = unitsBilled;
}

public String getLocationCode() {
    return locationCode;
}

public void setLocationCode(String locationCode) {
    this.locationCode = locationCode;
}


public String getArrearCollection() {
    return arrearCollection;
}

public void setArrearCollection(String arrearCollection) {
    this.arrearCollection = arrearCollection;
}

public String getCurrentCollection() {
    return currentCollection;
}

public void setCurrentCollection(String currentCollection) {
    this.currentCollection = currentCollection;
}

public String getArrearDemand() {
    return arrearDemand;
}

public void setArrearDemand(String arrearDemand) {
    this.arrearDemand = arrearDemand;
}

public String getCurrentDemand() {
    return currentDemand;
}

public void setCurrentDemand(String currentDemand) {
    this.currentDemand = currentDemand;
}

public String getUnitsBilled() {
    return unitsBilled;
}

public void setUnitsBilled(String unitsBilled) {
    this.unitsBilled = unitsBilled;
}

}

界面

public interface SapRevenueService {

    @POST("/Desiredpath")
    Call<List<SapRevenue>> getData(@Body String stdate);

}

来自 Postman 的快照

Answer 1

试试这个方法

@FormUrlEncoded
@POST("/Desiredpath")
Call<List<SapRevenue>> getData(@Field("stdate") String stdate);

从 here

创建你的 pojo class

希望这项工作:)

Answer 2

我认为问题出在这里，您想将 json 解析为列表，但实际上服务器 return 为您提供了一个包含列表的对象。

所以你的回复 return 类型应该是这样的：

Call<SapRevenueResponse>

其中 SapRevenueResponse：

SapRevenueResponse {
   ... List ...
}

使用 POST Body with Form-Data in Android 调用时改造不返回 JSON 对象

Retrofit not returning JSON object when called using POST Body with Form-Data in Android

android

retrofit