创建您的 POJO 模型类从json响应

Create your POJO Model class from the json response

Passanger.java

public class Passanger {

@SerializedName("Passenger")
@Expose
private String passenger;
@SerializedName("BookingStatus")
@Expose
private String bookingStatus;
@SerializedName("CurrentStatus")
@Expose
private String currentStatus;

//implement getter,setter

}

TrainData.java

public class TrainData {

@SerializedName("PnrNumber")
@Expose
private String pnrNumber;
@SerializedName("Status")
@Expose
private String status;
@SerializedName("ResponseCode")
@Expose
private String responseCode;
@SerializedName("TrainNumber")
@Expose
private String trainNumber;
@SerializedName("TrainName")
@Expose
private String trainName;
@SerializedName("JourneyClass")
@Expose
private String journeyClass;
@SerializedName("ChatPrepared")
@Expose
private String chatPrepared;
@SerializedName("From")
@Expose
private String from;
@SerializedName("To")
@Expose
private String to;
@SerializedName("JourneyDate")
@Expose
private String journeyDate;
@SerializedName("Passangers")
@Expose
private List<Passanger> passangers = null;

//implement getter, setter

}

改造api接口

public interface Api {

    @GET("/your_api_endpoint")
    Call<TrainData> retriveTrainData();

}

提出请求

Call<TrainData> call = getRetrofitInstance().create(Api.class).retriveTrainData();
            call.enqueue(new Callback<TrainData>() {
                @Override
                public void onResponse(Call<TrainData> call, Response<TrainData> response) {
                    if(response.isSuccessful()) {
                         response.body().getPassangers();
                        //...
                    }
                }

                @Override
                public void onFailure(Call<TrainData> call, Throwable t) {
                   //..
                }
            });

网上有很多资源，更多详情可以阅读以下文章

There are plenty of resources online, for more details you can read the following articles

vogella

androidhive

android.jlelse