通过OuterClass对象访问InnerClass对象

时间：2017-03-27 09:02:33

标签： java android json

我有一个自定义类的飞行和内部票价

public class Flight {
    private String airlineCode;
    private String airlineClass;
    private String originCode;
    private String destinationCode;
    private String departureTime;
    private String ArrivalTime;

    public Flight (String originCode,String destinationCode,String departureTime,String arrivalTime,
                   String airlineCode, String airlineClass){
        this.originCode=originCode;
        this.destinationCode=destinationCode;
        this.departureTime=departureTime;
        this.ArrivalTime=arrivalTime;
        this.airlineCode=airlineCode;
        this.airlineClass=airlineClass;

    }

    public String getAirlineCode() {
        return airlineCode;
    }

    public void setAirlineCode(String airlineCode) {
        this.airlineCode = airlineCode;
    }

    public String getAirlineClass() {
        return airlineClass;
    }

    public void setAirlineClass(String airlineClass) {
        this.airlineClass = airlineClass;
    }

    public String getOriginCode() {
        return originCode;
    }

    public void setOriginCode(String originCode) {
        this.originCode = originCode;
    }

    public String getDestinationCode() {
        return destinationCode;
    }

    public void setDestinationCode(String destinationCode) {
        this.destinationCode = destinationCode;
    }

    public String getDepartureTime() {
        return departureTime;
    }

    public void setDepartureTime(String departureTime) {
        this.departureTime = departureTime;
    }

    public String getArrivalTime() {
        return ArrivalTime;
    }

    public void setArrivalTime(String arrivalTime) {
        ArrivalTime = arrivalTime;
    }

    //Inner Class
    class Fare{
        private String providerId;
        private String fare;

        public Fare(String providerId,String fare){
            this.providerId=providerId;
            this.fare=fare;
        }

        public String getProviderId() {
            return providerId;
        }

        public String getFare() {
            return fare;
        }
    }
}

我有一个示例JSON，我必须遍历并将Value放在该自定义类中。以下是JSON的简短示例。

{
  "flights": [
    {
      "originCode": "DEL",
      "destinationCode": "BOM",
      "departureTime": 1396614600000,
      "arrivalTime": 1396625400000,
      "fares": [
        {
          "providerId": 1,
          "fare": 11500
        },
        {
          "providerId": 2,
          "fare": 10500
        }
      ],
      "airlineCode": "G8",
      "class": "Business"
    },
    {
      "originCode": "DEL",
      "destinationCode": "BOM",
      "departureTime": 1396616400000,
      "arrivalTime": 1396623600000,
      "fares": [
        {
          "providerId": 1,
          "fare": 14400
        },
        {
          "providerId": 3,
          "fare": 14000
        }
      ],
      "airlineCode": "AI",
      "class": "Business"
    }
  ]
}

我正在解析并创建像此一样的ArrayList 

public static final ArrayList<Flight> extractdata(String jsonResponse) {
        ArrayList<Flight> flights = new ArrayList<Flight>();

        try {
            JSONObject rootobject = new JSONObject(jsonResponse);

            JSONArray flight = rootobject.getJSONArray("flights");

            for (int i = 0; i < flight.length(); i++) {
                JSONObject arrayObject = flight.getJSONObject(i);

                String originCode = arrayObject.getString("originCode");
                Log.d(LOG_TAG,"originalcode"+  originCode);
                String destinationCode = arrayObject.getString("destinationCode");
                Log.d(LOG_TAG,"destinationcode"+  destinationCode);
                String departureTime = arrayObject.getString("departureTime");
                Log.d(LOG_TAG,"departuretime"+  departureTime);
                String arrivalTime = arrayObject.getString("arrivalTime");
                Log.d(LOG_TAG,"arrivaltime"+  arrivalTime);
                String airlineCode = arrayObject.getString("airlineCode");
                Log.d(LOG_TAG,"airlinecode"+  airlineCode);
                String airlineClass = arrayObject.getString("class");
                Log.d(LOG_TAG,"class"+  airlineClass);
                Long eTime = Long.parseLong(arrivalTime);
                Date dateObject = new Date(eTime);
                Long dTime = Long.parseLong(departureTime);
                Date dateObject2 = new Date(dTime);
                SimpleDateFormat dateFormat = new SimpleDateFormat("HH mm ");
                String arrival = dateFormat.format(dateObject);
                String depart = dateFormat.format(dateObject2);
                JSONArray arrayFare=arrayObject.getJSONArray("fares");

                String providerId;
                String fare;
                int number=arrayFare.length();
                Flight flightObject=new Flight(originCode,destinationCode,depart,arrival,airlineCode,airlineClass);
                for (int j=0;j<arrayFare.length();j++){
                    JSONObject arrayFareObject=arrayFare.getJSONObject(j);
                    providerId=arrayFareObject.getString("providerId");
                    fare=arrayFareObject.getString("fare");
                    Log.d(LOG_TAG,"providerId & fare :"+providerId+" "+fare);
                    Flight.Fare fareObject[]= new Flight.Fare[number];
                    fareObject[j]=flightObject.new Fare(providerId,fare);
                }
                flights.add(flightObject);   
            }      
        } catch (JSONException e) {
            Log.e(LOG_TAG, "problem parsing jsone", e);
        }
        return flights;    
    }

现在我需要访问InnerClass对象，无论单击哪个Flight Object。我怎么做。我无法访问这些对象。

我是这样想的。

public  void updateUi(final ArrayList<Flight> flights1)
{

    final FlightAdapter flightAdapter=new FlightAdapter(this,flights1);
    ListView flightlistview=(ListView)findViewById(R.id.list);
    flightlistview.setAdapter(flightAdapter);
    flightlistview.setOnItemClickListener(new AdapterView.OnItemClickListener() 
    {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id)
        {
            Flight flight=flightAdapter.getItem(position);
            Intent fareintent=new Intent(FlightSearchActivity.this,FareActivity.class);
            startActivity(fareintent);
        }
    });
}

3 个答案:

答案 0 :(得分：2)

这样做的一种方法是，因为每次航班都会有不同航空公司的票价。您可以将票价的ArrayList作为每个航班的属性。

List<Fare> fares

然后在阅读json响应时，您可以阅读并创建单个Fare类实例，并将这些实例添加到票价列表中。一旦您将单个航班的所有票价添加到列表中，请将此列表设置为Flight实例的票价属性。

List<Fare>fares=new ArrayList<Fare>();
//This code should be in a loop so you can add all the fares to the ArrayList

Fare f=new Fare();
f.setProviderId("AI");
f.setFare("12000");

fares.add(f);

现在将票价列表添加到Flight实例 flight.setFares(fares)

希望这有帮助。

答案 1 :(得分：1)

您需要为您的航班提供票价对象。

如果这样做，只需创建一个Fare类型的对象，不与特定的Flight Object连接。

Flight.Fare fareObject[]= new Flight.Fare[number];
fareObject[j]=flightObject.new Fare(providerId,fare);

相反，在Fligt类中声明Fare对象和其他变量：

...
private String destinationCode;
private String departureTime;
private String ArrivalTime;
Fare fare;

编辑：为航班的多个票价添加票价数组

..
ArrayList<Fare> fares;

答案 2 :(得分：1)

将您的Flight课程修改为：

public class Flight {
    private String airlineCode;
    private String airlineClass;
    private String originCode;
    private String destinationCode;
    private String departureTime;
    private String ArrivalTime;
    private List<Fare> fares;

    public Flight (String originCode,String destinationCode,String departureTime,String arrivalTime, String airlineCode, String airlineClass, List<Fare> fares){
        this.originCode=originCode;
        this.destinationCode=destinationCode;
        this.departureTime=departureTime;
        this.ArrivalTime=arrivalTime;
        this.airlineCode=airlineCode;
        this.airlineClass=airlineClass;
        this.fares = fares;
    }
    ... //Other getters and setters

    public List<Fare> getFares() {
        return fares;
    }

    public void setFares(List<Fare> fares) {
        this.fares = fares;
    }

    ... //Inner class code
}

现在使用extractdata方法，

public static final ArrayList<Flight> extractdata(String jsonResponse) {
        ArrayList<Flight> flights = new ArrayList<Flight>();

        try {
            JSONObject rootobject = new JSONObject(jsonResponse);

            JSONArray flight = rootobject.getJSONArray("flights");

            for (int i = 0; i < flight.length(); i++) {
                JSONObject arrayObject = flight.getJSONObject(i);

                String originCode = arrayObject.getString("originCode");
                String destinationCode = arrayObject.getString("destinationCode");
                String departureTime = arrayObject.getString("departureTime");
                String arrivalTime = arrayObject.getString("arrivalTime");
                String airlineCode = arrayObject.getString("airlineCode");
                String airlineClass = arrayObject.getString("class");
                Long eTime = Long.parseLong(arrivalTime);
                Date dateObject = new Date(eTime);
                Long dTime = Long.parseLong(departureTime);
                Date dateObject2 = new Date(dTime);
                SimpleDateFormat dateFormat = new SimpleDateFormat("HH mm ");
                String arrival = dateFormat.format(dateObject);
                String depart = dateFormat.format(dateObject2);
                JSONArray arrayFare = arrayObject.getJSONArray("fares");

                List<Fare>fares=new ArrayList<Fare>();

                for (int j=0;j<arrayFare.length();j++){
                    JSONObject arrayFareObject = arrayFare.getJSONObject(j);
                    String providerId = arrayFareObject.getString("providerId");
                    String fare = arrayFareObject.getString("fare");
                    Flight.Fare fareObject = new Flight.Fare(providerId, fare);
                    fares.add(fareObject);
                }
                Flight flightObject = new Flight(originCode, destinationCode, depart, arrival, airlineCode, airlineClass, fares);
                flights.add(flightObject);
            }


        } catch (JSONException e) {
            Log.e(LOG_TAG, "problem parsing jsone", e);
        }
        return flights;    
    }

现在，在updateUi功能中，您可以通过调用fares方法获取getFares：

public  void updateUi(final ArrayList<Flight> flights1) {

    final FlightAdapter flightAdapter = new FlightAdapter(this,flights1);
    ListView flightlistview = (ListView)findViewById(R.id.list);
    flightlistview.setAdapter(flightAdapter);
    flightlistview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Flight flight = flightAdapter.getItem(position);
            List<Fare> fares = flight.getFares();  //This will have all the fares.
            Intent fareintent = new Intent(FlightSearchActivity.this,FareActivity.class);

            startActivity(fareintent);

        }
    });
}

警告：我没有测试过这段代码，但它应该与这些代码类似。

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