无法使用改造库获取数据

Question

Hai Iam 是改装的新手，我的目标是尝试使用改装库从 url 获取数据，这是我的 json 数据

我想在每个数组中显示名称。

这里是 gson 转换的 Pojo 类

RestResponse.java

public class RestResponse {
    @SerializedName("messages")
    @Expose
    private List<String> messages = null;
    @SerializedName("result")
    @Expose
    private List<Result> result = null;

    public List<String> getMessages() {
        return messages;
    }

    public void setMessages(List<String> messages) {
        this.messages = messages;
    }

    public List<Result> getResult() {
        return result;
    }

    public void setResult(List<Result> result) {
        this.result = result;
    }
}

和第二个 Result.java

public class Result {
    @SerializedName("name")
    @Expose
    private String name;
    @SerializedName("alpha2_code")
    @Expose
    private String alpha2Code;
    @SerializedName("alpha3_code")
    @Expose
    private String alpha3Code;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAlpha2Code() {
        return alpha2Code;
    }

    public void setAlpha2Code(String alpha2Code) {
        this.alpha2Code = alpha2Code;
    }

    public String getAlpha3Code() {
        return alpha3Code;
    }

    public void setAlpha3Code(String alpha3Code) {
        this.alpha3Code = alpha3Code;
    }

}

最后是RestResponseMain.java // Example.java Gson Converter生成的文件

public class RestResponseMain {

    @SerializedName("RestResponse")
    @Expose
    private RestResponse restResponse;

    public RestResponse getRestResponse() {
        return restResponse;
    }

    public void setRestResponse(RestResponse restResponse) {
        this.restResponse = restResponse;
    }
}

通过使用以上类我试图通过

检索数据

实际URL是：http://services.groupkt.com/country/get/all

我的 Apiclenit 文件是：

public class ApiClient {
    public static final String BaseUrl="http://services.groupkt.com";
    public static Retrofit retrofit = null;
    public static Retrofit getData()
    {
        if(retrofit==null)
        {
            retrofit = new Retrofit.Builder().baseUrl(BaseUrl).addConverterFactory(GsonConverterFactory.create()).build();
        }



        return retrofit;
    }
}

而 ApiInterface 是

public interface ApiInterface {
    @GET("/country/get/all")
    Call<RestResponse> getData();
}

在 MainActivity 中，我使用的操作是

ApiInterface apiInterface = ApiClient.getData().create(ApiInterface.class);
            Call<RestResponse> call = apiInterface.getData();
            pDialog.show();
            call.enqueue(new Callback<RestResponse>() {
                @Override
                public void onResponse(Call<RestResponse> call, Response<RestResponse> response) {
                    pDialog.dismiss();
                    List<Result> list = response.body().getResult();
                    MyRecyclerRetrofitAdapter adapter = new MyRecyclerRetrofitAdapter(MainActivity.this,list);
                    rView.setAdapter(adapter);
                }

                @Override
                public void onFailure(Call<RestResponse> call, Throwable t) {

                }
            });

我在适配器文件中使用

holder.tvName.setText(data.get(position).getName());//using recycler & card view

最后我没有从上述过程中得到任何回应，我是改造概念的新手，我正在通过一些在线教程尝试这个。

根据上面代码中的 pojo 类向我建议可能的更改。

Answer 1

/** * API 来电 */

private static ServiceInterface apiService;

public ServiceInterface callWSAds() {

    if (!isInternetAvailable()) {

    }

    OkHttpClient.Builder builder = new OkHttpClient().newBuilder();

    builder.readTimeout(HTTP_TIMEOUT, TimeUnit.SECONDS)
            .writeTimeout(HTTP_TIMEOUT, TimeUnit.SECONDS)
            .connectTimeout(HTTP_TIMEOUT, TimeUnit.SECONDS)
            .addInterceptor(new Interceptor() {
                @Override
                public okhttp3.Response intercept(Chain chain) throws IOException {

                    Request originalRequest = chain.request();
                    Request.Builder requestBuilder = originalRequest.newBuilder().method(originalRequest.method(), originalRequest.body());

                    Request request = requestBuilder.build();
                    return chain.proceed(request);

                }
            });

    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    builder.addInterceptor(interceptor);

    OkHttpClient client = builder.build();
    Retrofit retrofit;
    retrofit = new Retrofit.Builder()
            .baseUrl(DEV_BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .client(client)
            .build();

    apiService = retrofit.create(ServiceInterface.class);

    return apiService;
}

long HTTP_TIMEOUT = 80;

callWSAds().getAdsSettingsNew(map).enqueue(new Callback<AdsSetting>() { //Need to change here
            @Override
            public void onResponse(Call<AdsSetting> call, Response<AdsSetting> response) {
            if (response.body() != null) {
                saveResponseOffline(response.body());
                setting = getResponseOffline();

                launchApp();//To track the launches of application
            }
        }

        @Override
        public void onFailure(Call<AdsSetting> call, Throwable t) {
            if (setting == null) {
                loadJSONFromAsset();
            }
        }
    });

此示例包含 POST 方法调用。请使用这种配置使API调用更简单。

Answer 2

你绑定了一个错误的模型 calss 所以你只需要改变你的基础 url 需要以 "/"

结尾

RestResponse

到

RestResponseMain

API 客户

public class ApiClient {
    public final String baseUrl="http://services.groupkt.com/";
    public static Retrofit retrofit;

    public static Retrofit getData() {

        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                            .baseUrl(BaseUrl)
                            .addConverterFactory(GsonConverterFactory.create())
                            .build();
        }
        return retrofit;
    }
}

在API界面和MainActivty.show下面

API 界面

public interface ApiInterface {
@GET("country/get/all")
Call<RestResponseMain> getData();
}

主要活动

ApiInterface apiInterface = ApiClient.getData().create(ApiInterface.class);
            Call<RestResponseMain> call = apiInterface.getData();
            pDialog.show();
            call.enqueue(new Callback<RestResponseMain>() {
                @Override
                public void onResponse(Call<RestResponseMain> call, Response<RestResponseMain> response) {
                    pDialog.dismiss();
                    List<Result> list = response.body().getResult();
                    MyRecyclerRetrofitAdapter adapter = new MyRecyclerRetrofitAdapter(MainActivity.this,list);
                    rView.setAdapter(adapter);
                }

                @Override
                public void onFailure(Call<RestResponseMain> call, Throwable t) {

                }
            });

Answer 3

您的基础 url 需要按照 Retrofit 文档的规定以“/”结尾。

API客户端：

public class ApiClient {
    public final String baseUrl="http://services.groupkt.com/";
    public static Retrofit retrofit;

    public static Retrofit getData() {

        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                            .baseUrl(BaseUrl)
                            .addConverterFactory(GsonConverterFactory.create())
                            .build();
        }
        return retrofit;
    }
}

API接口：

public interface ApiInterface {
    @GET("country/get/all") 
    Call<RestResponse> getData();
}

无法使用改造库获取数据

Unable to get data using retrofit library

android

pojo

gson

retrofit