从改造android中的Web服务响应中获取数据

Question

我正在从四天开始进行改造。我学会了如何从 Web 服务获取数据，但现在我坚持这个响应。请任何人告诉我如何从网络服务获取数据。如何获取 operator id、operator、RechareTypes 字符串数组。请任何人帮助我。提前致谢。

我的代码： 运营商：

public class Operator {
    @Expose
    private String OperatorID="";
    @Expose
    private String ServiceTypeID="";

    public String getServiceTypeID() {
        return ServiceTypeID;
    }

    public void setServiceTypeID(String serviceTypeID) {
        ServiceTypeID = serviceTypeID;
    }

    public String getOperatorID() {
        return OperatorID;
    }

    public void setOperatorID(String operatorID) {
        OperatorID = operatorID;
    }

    public String getOperatorname() {
        return operatorname;
    }

    public List<Operators> getOrderItems() {
        return OrderItems;
    }

    public void setOrderItems(List<Operators> orderItems) {
        OrderItems = orderItems;
    }

    public void setOperatorname(String operatorname) {
        this.operatorname = operatorname;
    }

    @Expose

    private String operatorname="";
    @Expose
    private List<Operators> OrderItems = new ArrayList<Operators>();
    public Operator(){

    }
}

运营商：

public class Operators {
   private  String RechargeTypeID="";

    public String getRechargeType() {
        return RechargeType;
    }

    public void setRechargeType(String rechargeType) {
        RechargeType = rechargeType;
    }

    public String getSMSCode() {
        return SMSCode;
    }

    public void setSMSCode(String SMSCode) {
        this.SMSCode = SMSCode;
    }

    public String getRechargeTypeID() {
        return RechargeTypeID;
    }

    public void setRechargeTypeID(String rechargeTypeID) {
        RechargeTypeID = rechargeTypeID;
    }

    private String RechargeType="";
    private String SMSCode="";
}

活动：

ArrayList<Operator> operator;

    void executeCircleAndOperatorsList() {
            db.ClearTables();
            ServiceClient serviceClient = ServiceUtil.getServiceClient();

            JsonParser jsonParser = new JsonParser();

            serviceClient.getOperators("getRecharge_Operator_v2", operatorCallback);

        }

Callback<JsonObject> operatorCallback = new Callback<JsonObject>() {

        @Override
        public void success(final JsonObject jsonObject, Response response) {
            parseoperators(jsonObject);
            Thread t=new Thread(new Runnable() {
                @Override
                public void run() {
                    parseoperators(jsonObject);
                }
            });
            t.start();
        }

        @Override
        public void failure(RetrofitError error) {

        }
    };
  public void parseoperators(JsonObject result) {
      if(result.has("Status")){
          try{
              String Status = result.get("Status")
                      .getAsString();
              if (Status.equals("1")) {
                  Gson gson = new Gson();
                  JsonArray array = result.get(
                          "data").getAsJsonArray();
                  Log.v("TAG_CIRCLELIST", "" + array);
                  Type type = new TypeToken<ArrayList<Operator>>() {
                  }.getType();

                  operator.addAll((Collection<? extends Operator>) gson
                          .fromJson(array, type));




              }
              else {
                  throw new JSONException("Something went wrong ");
              }
          }
          catch(JSONException e){

          }

      }



    }

json:

{
    "Status": 1,
    "data": [
        {
            "ServiceTypeID": 1,
            "OperatorID": 1,
            "Operator": "Airtel",
            "RechareTypes": [
                {
                    "RechargeTypeID": 1,
                    "RechargeType": "Topup",
                    "SMSCode": "AIRT"
                }
            ]
        },
        {
            "ServiceTypeID": 1,
            "OperatorID": 2,
            "Operator": "BSNL",
            "RechareTypes": [
                {
                    "RechargeTypeID": 2,
                    "RechargeType": "Topup",
                    "SMSCode": "BSNL"
                },
                {
                    "RechargeTypeID": 3,
                    "RechargeType": "Special",
                    "SMSCode": "BSNLSPL"
                }
            ]
        },
        {
            "ServiceTypeID": 1,
            "OperatorID": 3,
            "Operator": "Aircel",
            "RechareTypes": [
                {
                    "RechargeTypeID": 4,
                    "RechargeType": "Topup",
                    "SMSCode": "AIRC"
                }
            ]
        },
        {
            "ServiceTypeID": 1,
            "OperatorID": 4,
            "Operator": "Idea",
            "RechareTypes": [
                {
                    "RechargeTypeID": 5,
                    "RechargeType": "Topup",
                    "SMSCode": "IDEA"
                }
            ]
          }
    ]
}

Answer 1

Retrofit 默认使用 Gson 将 HTTP 正文与 JSON 相互转换

如下创建算子pojo

public class Operators {

    @Expose
    private String Status;
    @Expose
    private List<Operator> data = new ArrayList<Operator>();

    public String getStatus() {
        return Status;
    }

    public void setStatus(String Status) {
        this.Status = Status;
    }

    public List<Operator> getData() {
        return data;
    }

    public void setData(List<Operator> data) {
        this.data = data;
    }
}

class Operator {

    @Expose
    private String ServiceTypeID;
    @Expose
    private String OperatorID;
    @Expose
    private String Operator;
    @Expose
    private List<RechareType> RechareTypes = new ArrayList<RechareType>();

    public String getServiceTypeID() {
        return ServiceTypeID;
    }

    public void setServiceTypeID(String ServiceTypeID) {
        this.ServiceTypeID = ServiceTypeID;
    }

    public String getOperatorID() {
        return OperatorID;
    }

    public void setOperatorID(String OperatorID) {
        this.OperatorID = OperatorID;
    }

    public String getOperator() {
        return Operator;
    }

    public void setOperator(String Operator) {
        this.Operator = Operator;
    }

    public List<RechareType> getRechareTypes() {
        return RechareTypes;
    }

    public void setRechareTypes(List<RechareType> RechareTypes) {
        this.RechareTypes = RechareTypes;
    }

}

class RechareType {

    @Expose
    private String RechargeTypeID;
    @Expose
    private String RechargeType;
    @Expose
    private String SMSCode;

    public String getRechargeTypeID() {
        return RechargeTypeID;
    }

    public void setRechargeTypeID(String RechargeTypeID) {
        this.RechargeTypeID = RechargeTypeID;
    }

    public String getRechargeType() {
        return RechargeType;
    }

    public void setRechargeType(String RechargeType) {
        this.RechargeType = RechargeType;
    }

    public String getSMSCode() {
        return SMSCode;
    }

    public void setSMSCode(String SMSCode) {
        this.SMSCode = SMSCode;
    }

}

将“void executeCircleAndOperatorsList()”更新为

void executeCircleAndOperatorsList() {
    db.ClearTables();
    ServiceClient serviceClient = ServiceUtil.getServiceClient();
    Callback<Operators> callback = new Callback<Operators>() {
    @Override
    public void failure(RetrofitError arg0) {
    }
    @Override
    public void success(Operators operatorList, Response arg1) {
        if(operatorList.getStatus().equalsIgnoreCase("1")){
                Log.d("Operator_ID", operatorList.getData().get(0).getOperatorID());    
            }
        }
    };
    serviceClient.getOperators("getRecharge_Operator_v2", callback);
}   

相应地更新 getoperators 方法签名以添加回调Callback<Operators> cb

 void getOperators(Callback<Operators> cb); 

Answer 2

使用 Retrofit 的最佳实践

为 Retrofit 和 GSON 编译这个库

compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'

所有网络服务的请求接口 (POST/GET)

public interface RequestInterface {

@POST("/api/postUserdata")
Call<Boolean> addUserData(@Body User user);


@GET("/api/getAllUsers")
Call<List<Data>> getAllUsersDetails();

@POST("/api/isEmailExist")
Call<Boolean> isEmailExist(@Path("Email") String Email);

}

Webservice 客户端 API 的 CommonHelper 类

public class CommonHelper {

public RequestInterface service;
public String BASE_URL = "your base url";

public RequestInterface getRetrofitInstance() {
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    service = retrofit.create(RequestInterface.class);
    return service;
}

public boolean isConnectingToInternet(Context _context) {
    ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (connectivity != null) {
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        if (info != null)
            for (int i = 0; i < info.length; i++)

                if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                    return true;
                }

    }
    return false;
}
}

在 Activity 中调用 Web 服务

public void getDataFromServer() {

    mProgressDialog = new ProgressDialog(getActivity());
    mProgressDialog.setIndeterminate(true);
    mProgressDialog.setCancelable(false);
    mProgressDialog.setTitle("Loading");
    mProgressDialog.setMessage("Getting data...");


  CommonHelper commonHeloper = new CommonHelper();

  Call<List<Data>> call= commonHelper.getRetrofitInstance().getAllUsersDetails();


  call.enqueue(new Callback<List<Data>>() {
        @Override
        public void onResponse(Response<List<Data>> response, Retrofit retrofit) {
            mProgressDialog.dismiss();



        }

        @Override
        public void onFailure(Throwable t) {
            t.printStackTrace();
            mProgressDialog.dismiss();
        }
    });
}