在Android應用程序的改造實現中訪問kotlin類自動生成的getter方法

Question

我正在嘗試使用kotlin語言在android應用程序中實現翻新庫，但我打算使用kotlin的自動生成的getter功能來獲取MovieResponse類的值。

這是MovieResponse類：

class MovieResponse {

    @SerializedName("page")
    private var page : Int? = null

    @SerializedName("results")
    private var results : List<Movie>? = null

    @SerializedName("total_results")
    private var totalResults : Int? = null

    @SerializedName("total_pages")
    private var totalPages : Int? = null

    constructor(page: Int?, results: List<Movie>?, totalResults: Int?, totalPages: Int?) {
        this.page = page
        this.results = results
        this.totalResults = totalResults
        this.totalPages = totalPages
    }


}

這是我的android MainActivity類：

class MainActivity : AppCompatActivity() {

    private val TAG : String = MainActivity::class.java.simpleName
    val BASE_URL : String = "http://api.themoviedb.org/3/"
    private var retrofit : Retrofit? = null
    private var recyclerView : RecyclerView? = null
    private var API_KEY : String = "166873e095bdb281691220d5ad12610c"

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

        // setup the layout manager
        recycler_view.setHasFixedSize(true)
        recycler_view.layoutManager = LinearLayoutManager(this)

        // get the data
        connectAndGetData()

    }

    /**
     * This method creates an instance of Retrofit
     * and set the base url
     */
    private fun connectAndGetData() {
        if (retrofit == null) {
            retrofit = Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build()
        }

        val movieApiService = retrofit!!.create(MovieApiService::class.java)

        val call : Call<MovieResponse> = movieApiService!!.getTopRatedMovies(API_KEY)
        call.enqueue(object : Callback<MovieResponse> {
            override fun onFailure(call: Call<MovieResponse>, t: Throwable) {
            }

            override fun onResponse(call: Call<MovieResponse>, response: Response<MovieResponse>) {
                val movies : List<Movie> = response.body() #<-- stuck here
                recyclerView!!.adapter = MoviesAdapter(movies, R.layout.list_item_movie, applicationContext)
                Log.d(TAG, "Number of movies received: " + movies.size)
            }
        })


    }
}

我無法得到這個

@SerializedName("results")
        private var results : List<Movie>? = null

從這里：

val movies : List<Movie> = response.body()

在普通的java中

val movies : List<Movie> = response.body().getResults()

但是在Kotlin中，我似乎無法實現這一點。

我對“電影數據庫API”的回答：

{
    "page": 1,
    "total_results": 7444,
    "total_pages": 373,
    "results": [
        {
            "vote_count": 2080,
            "id": 19404,
            "video": false,
            "vote_average": 9,
            "title": "Dilwale Dulhania Le Jayenge",
            "popularity": 16.5,
            "poster_path": "\/uC6TTUhPpQCmgldGyYveKRAu8JN.jpg",
            "original_language": "hi",
            "original_title": "दिलवाले दुल्हनिया ले जायेंगे",
            "genre_ids": [
                35,
                18,
                10749
            ],
            "backdrop_path": "\/mMaxGuQKuH4WUHBwUNhJOetDYE9.jpg",
            "adult": false,
            "overview": "Raj is a rich, carefree, happy-go-lucky second generation NRI. Simran is the daughter of Chaudhary Baldev Singh, who in spite of being an NRI is very strict about adherence to Indian values. Simran has left for India to be married to her childhood fiancé. Raj leaves for India with a mission at his hands, to claim his lady love under the noses of her whole family. Thus begins a saga.",
            "release_date": "1995-10-20"
        },
        {...}
     ]
}

Answer 1

您的變量在MovieResponse類中似乎是私有的，因此您不能從類外部訪問它。 檢查一下 。