如何从Amadeus API (Kotlin Android)获取JSON结果

dependencies {
    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:4.9.0' // 可选，用于日志记录
}

import retrofit2.Call
import retrofit2.http.GET
import retrofit2.http.Query

interface AmadeusApiService {
    @GET("v2/shopping/flight-offers")
    fun getFlightOffers(
        @Query("origin") origin: String,
        @Query("destination") destination: String,
        @Query("departureDate") departureDate: String,
        @Query("adults") adults: Int,
        @Query("apikey") apiKey: String // 您的 API 密钥
    ): Call<FlightOffersResponse>
}

data class FlightOffersResponse(
    val data: List<FlightOffer>
)

data class FlightOffer(
    val type: String,
    val id: String,
    val source: String,
    val instantTicketingRequired: Boolean,
    val nonHomogeneous: Boolean,
    val oneWay: Boolean,
    val lastTicketingDate: String,
    val price: Price,
    val itinerary: List<Itinerary>
)

data class Price(
    val currency: String,
    val total: String,
    val base: String,
    val fees: List<Fee>
)

data class Fee(
    val amount: String,
    val type: String
)

data class Itinerary(
    val segments: List<Segment>
)

data class Segment(
    val departure: Departure,
    val arrival: Arrival,
    val carrierCode: String,
    val number: String,
    val aircraft: String,
    val duration: String
)

data class Departure(
    val iataCode: String,
    val at: String
)

data class Arrival(
    val iataCode: String,
    val at: String
)

import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory

object RetrofitClient {
    private const val BASE_URL = "https://api.amadeus.com/"

    val instance: AmadeusApiService by lazy {
        val retrofit = Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .build()

        retrofit.create(AmadeusApiService::class.java)
    }
}

import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        fetchFlightOffers()
    }

    private fun fetchFlightOffers() {
        val apiKey = "YOUR_API_KEY" // 替换为您的 API 密钥
        val origin = "NYC"
        val destination = "LAX"
        val departureDate = "2023-12-01"
        val adults = 1

        RetrofitClient.instance.getFlightOffers(origin, destination, departureDate, adults, apiKey)
            .enqueue(object : Callback<FlightOffersResponse> {
                override fun onResponse(call: Call<FlightOffersResponse>, response: Response<FlightOffersResponse>) {
                    if (response.isSuccessful) {
                        val flightOffers = response.body()
                        Log.d("FlightOffers", flightOffers.toString())
                    } else {
                        Log.e("FlightOffers", "Error: ${response.errorBody()?.string()}")
                    }
                }

                override fun onFailure(call: Call<FlightOffersResponse>, t: Throwable) {
                    Log.e("FlightOffers", "Failure: ${t.message}")
                }
            })
    }
}

<uses-permission android:name="android.permission.INTERNET"/>