在Android中将POST正文与Form-Data一起使用时，翻新不返回JSON对象

问题描述

我目前正在开发一个Android应用，其中我正在使用Retrofit通过POST Form-Data访问API。该API在POSTMAN中可以正常运行，但在Android中却报错

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

请建议我在哪里做错了。预先感谢。

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

公共类SapRevenue实现了可序列化，可比较的{

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);

}

邮差的快照

解决方法

尝试这种方式

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

从here

创建您的pojo类

希望这项工作：）

,

我相信这里是您想将json解析为List的问题，但实际上服务器会向您返回一个内部包含list的对象。

因此您的响应返回类型应类似于：

Call<SapRevenueResponse>

其中SapRevenueResponse：

SapRevenueResponse {
   ... List ...
}