Kotlin: How to display data?

Question

I'm working on this app that shows popular movies. I got this Log: "/results: retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall@9daee07". I got everything done but I don't get any result in my RecyclerView. I don't know how to display data that I fetched. This is url: http://api.themoviedb.org/3/movie/popular?api_key=api_key_goes_here.

MovieResponse.kt

data class MovieResponse(
    val page: Int,
    val results: List<Movie>,
    @SerializedName("total_pages") val totalPages: Int,
    @SerializedName("total_results") val totalResults: Int
)

Movie.kt

data class Movie(
    val id: Int,
    val overview: String,
    val popularity: Double,
    @SerializedName("poster_path") val posterPath: String,
    @SerializedName("release_date") val releaseDate: String,
    val title: String,
    @SerializedName("vote_average") val voteAverage: Double
)

MainAdapter.kt

package com.example.sloomena.ui

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import com.example.sloomena.R
import com.example.sloomena.data.MovieResponse
import kotlinx.android.synthetic.main.movie_details_row.view.*

class MainAdapter: RecyclerView.Adapter<CustomHolder>(){

    val movies: MutableList<MovieResponse> = mutableListOf()

    fun refreshData(newResults: List<MovieResponse>) {
        movies.clear()
        movies.addAll(newResults)
        notifyDataSetChanged()
    }

    override fun getItemCount(): Int {
        return movies.size
    }

    override fun onBindViewHolder(holder: CustomHolder, position: Int) {
        holder.bind(movies.get(position))
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomHolder {
        val layoutInflater = LayoutInflater.from(parent?.context)
        val cellForRow =  layoutInflater.inflate(R.layout.movie_details_row, parent, false)
        return CustomHolder(cellForRow)
    }
}
class CustomHolder(itemView: View): RecyclerView.ViewHolder(itemView){
    fun bind(movie: MovieResponse) {

        itemView.title.text = movie.results.toString()
    }
}

thmdbAPI.kt

interface tmdbAPI {

    @GET("movie/popular")
    fun getPopularMovies(
        @Query("api_key") api_key: String
    ): Call<List<MovieResponse>>
}

Networking.kt

const val BASE_URL = "http://api.themoviedb.org/3/"

object Networking{
    val showSearchService: tmdbAPI = Builder()
        .addConverterFactory(ConverterFactory.converterFactory)
        .client(HttpClient.client)
        .baseUrl(BASE_URL)
        .build()
        .create(tmdbAPI::class.java)
}
object ConverterFactory{
    val converterFactory = GsonConverterFactory.create()
}
object HttpClient{
    val client = OkHttpClient.Builder()
        .addInterceptor(HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))
        .build()
}

MainActivity.kt

class MainActivity : AppCompatActivity() {

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

        setUpUi()
        findMovies()
    }

    private fun setUpUi() {
        id_recyclerview.layoutManager = LinearLayoutManager(this)
        id_recyclerview.adapter = MainAdapter()
    }

    private fun findMovies() {
        GlobalScope.launch(Dispatchers.Main) {
            val results = Networking.showSearchService.getPopularMovies("api_key_goes_here")
            Log.d("results", results.toString())
        }}
}

In my movie_details_row.xml I have (id_picture_movie, id_movie_realise_date and title). Also, I don't know how to get properties in List(Movie) inside of MovieResponse.

there is no error, only my log show this '* * * retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall@9daee07' — Marina

Rafa Rafa · Accepted Answer · 2019-08-20T17:35:48

You aren't actually passing back any items to display after you've set up your recyclerview. So what you're doing is setting it up, sending a network request, and then you do nothing with that data.

val mainAdapter = MainAdapter()
...

private fun findMovies() {
        GlobalScope.launch(Dispatchers.Main) {
            val results = Networking.showSearchService.getPopularMovies("0b0e8d104f0d6130a4fc67848f89e107")
            Log.d("results", results.toString())

            //Assuming you're returning a list 
            mainAdapter.refreshData(results)
        }}
}

Kotlin: How to display data?

2 Answers