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トップに関する質問Retrofitを使った通信ができない

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2

2021/04/04 15:26

投稿

_kei
_kei

スコア26

test CHANGED
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test CHANGED
@@ -6,11 +6,7 @@
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- [リクエスト先](https://raw.githubusercontent.com/Biuni/PokemonGO-Pokedex/master/pokedex.json)
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-
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-
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-
13
- このリクエストのレスポンスとして返されたnameとimgをそれぞれテキスト、画像としてRecyclerViewを用いて描画したいです。その際、リストの型をうまく書くことができません。
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+ リクエストのレスポンスとして返されたnameとimgをそれぞれテキスト、画像としてRecyclerViewを用いて描画したいです。その際、リストの型をうまく書くことができません。
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1

問題文の修正

2021/04/04 15:26

投稿

_kei
_kei

スコア26

test CHANGED
File without changes
test CHANGED
@@ -18,17 +18,121 @@
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- 下のコードのsuspend関数の戻り値をどう書けばよいか分かりません。
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+ APIのsuspend関数の戻り値をどう書けばよいか分かりません。
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+
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+
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+
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-
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+ JSONを基に作成したdataクラス
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-
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25
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  ```kotlin
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- interface PokemonApi {
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+ data class Pokemon(
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+
28
-
31
+ var id: Int = 0,
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+
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+ var num: String? = null,
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+
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+ var name: String? = null,
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+
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+ var img: String? = null,
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+
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+ var type: List<String>? = null,
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+
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+ var height: String? = null,
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+
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+ var weight: String? = null,
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+
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+ var candy: String? = null,
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+
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+ var candy_count: Int = 0,
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+
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+ var egg: String? = null,
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+
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+ var spawn_chance: Double = 0.0,
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+
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+ var avg_spawns: Double = 0.0,
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+
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+ var spawn_time: String? = null,
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+
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+ var multipliers: List<Double>? = null,
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+
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+ var weaknesses: List<String>? = null,
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+
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+ var next_evolution: List<Evolution>? = null,
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+
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+ var prev_evolution: List<Evolution>? = null
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+
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+ )
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+
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+
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+
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+ data class Evolution(
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+
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+ var num: String? = null,
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+
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+ var name: String? = null
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+
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+ )
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+
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+ ```
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+
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+
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+
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+ MainActivity
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+
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+ ```kotlin
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+
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+ class MainActivity : AppCompatActivity() {
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+
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+ private lateinit var recyclerView: RecyclerView
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+
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+ private lateinit var pokemonAdapter: PokemonAdapter
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+
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+
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+
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+ private lateinit var viewModel: MainViewModel
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+
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+
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+
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+ override fun onCreate(savedInstanceState: Bundle?) {
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+
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+ super.onCreate(savedInstanceState)
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+
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+ setContentView(R.layout.activity_main)
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+
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+
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+
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- @GET("pokedex.json")
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+ val repository = Repository()
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+
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-
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+ val viewModelFactory = MainViewModelFactory(repository)
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+
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+ viewModel = ViewModelProvider(this, viewModelFactory).get(MainViewModel::class.java)
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+
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+
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+
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+ viewModel.getPokemon()
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+
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+
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+
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+ recyclerView = findViewById(R.id.recycler_view)
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+
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+ recyclerView.layoutManager =
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+
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+ LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
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+
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+
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+
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- suspend fun getPokemon(): Response<List<Pokemon>>
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+ viewModel.pokemons.observe(this, { response ->
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+
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+ if(response.isSuccessful){
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+
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+ pokemonAdapter = PokemonAdapter(this, response)
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+
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+ recyclerView.adapter = pokemonAdapter
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+
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+ }
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+
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+ })
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  }
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@@ -36,250 +140,86 @@
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- JSONを基に作成したdataクラス
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+ Adapterのコンストラクタ内のpokemonListをどのように書けばよいのか分かりませんでした。型を上記のinterfaceと同じResponse<List<Pokemon>>にした場合、リストの中身を参照できず、onBindViewHolder等で怒られてしまいます。
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  ```kotlin
42
146
 
43
- data class Pokemon(
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-
45
- var id: Int = 0,
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-
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- var num: String? = null,
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-
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- var name: String? = null,
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-
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- var img: String? = null,
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-
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- var type: List<String>? = null,
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-
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- var height: String? = null,
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-
57
- var weight: String? = null,
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-
59
- var candy: String? = null,
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-
61
- var candy_count: Int = 0,
62
-
63
- var egg: String? = null,
64
-
65
- var spawn_chance: Double = 0.0,
66
-
67
- var avg_spawns: Double = 0.0,
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-
69
- var spawn_time: String? = null,
70
-
71
- var multipliers: List<Double>? = null,
72
-
73
- var weaknesses: List<String>? = null,
74
-
75
- var next_evolution: List<Evolution>? = null,
76
-
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- var prev_evolution: List<Evolution>? = null
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-
79
- )
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-
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-
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-
83
- data class Evolution(
84
-
85
- var num: String? = null,
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-
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- var name: String? = null
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-
89
- )
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+ class PokemonAdapter(private var context: Context, private var pokemonList: List<Pokemon>) :
148
+
149
+ RecyclerView.Adapter<PokemonAdapter.PokemonHolder>() {
150
+
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+
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+
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+ inner class PokemonHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
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+
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+ var pokeImage: ImageView
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+
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+ var pokeName: TextView
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+
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+
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+
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+ init {
162
+
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+ pokeImage = itemView.findViewById(R.id.img_pokemon)
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+
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+ pokeName = itemView.findViewById(R.id.name_pokemon)
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+
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+ }
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+
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+ }
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+
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+
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+
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+ override fun onCreateViewHolder(
174
+
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+ parent: ViewGroup,
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+
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+ viewType: Int
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+
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+ ): PokemonAdapter.PokemonHolder {
180
+
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+ val view = LayoutInflater.from(parent.context).inflate(R.layout.row_pokemon, parent, false)
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+
183
+ return PokemonHolder(view)
184
+
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+ }
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+
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+
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+
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+ override fun onBindViewHolder(holder: PokemonAdapter.PokemonHolder, position: Int) {
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+
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+ holder.pokeName.text = pokemonList[position].name
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+
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+ Glide.with(context).load(pokemonList[position].img).into(holder.pokeImage)
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+
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+ }
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+
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+
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+
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+ override fun getItemCount(): Int {
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+
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+ return pokemonList.size
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+
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+ }
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+
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+
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+
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+ fun setPokemonList(newList: List<Pokemon>) {
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+
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+ pokemonList = newList
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+
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+ notifyDataSetChanged()
212
+
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+ }
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+
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+
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+
217
+ }
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91
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  ```
92
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93
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94
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95
- MainActivity
96
-
97
- ```kotlin
98
-
99
- class MainActivity : AppCompatActivity() {
100
-
101
- private lateinit var recyclerView: RecyclerView
102
-
103
- private lateinit var pokemonAdapter: PokemonAdapter
104
-
105
-
106
-
107
- private lateinit var viewModel: MainViewModel
108
-
109
-
110
-
111
- override fun onCreate(savedInstanceState: Bundle?) {
112
-
113
- super.onCreate(savedInstanceState)
114
-
115
- setContentView(R.layout.activity_main)
116
-
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-
118
-
119
- val repository = Repository()
120
-
121
- val viewModelFactory = MainViewModelFactory(repository)
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-
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- viewModel = ViewModelProvider(this, viewModelFactory).get(MainViewModel::class.java)
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-
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-
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-
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- viewModel.getPokemon()
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-
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-
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-
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- recyclerView = findViewById(R.id.recycler_view)
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-
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- recyclerView.layoutManager =
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-
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- LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
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-
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-
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-
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- viewModel.pokemons.observe(this, { response ->
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-
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- if(response.isSuccessful){
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-
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- pokemonAdapter = PokemonAdapter(this, response)
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-
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- recyclerView.adapter = pokemonAdapter
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-
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- }
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-
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- })
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-
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- }
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-
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- ```
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-
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- MainViewModel
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-
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- ```kotlin
158
-
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- class MainViewModel(private val repository: Repository): ViewModel() {
160
-
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-
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-
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- val pokemons: MutableLiveData<Response<List<Pokemon>>> = MutableLiveData()
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-
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-
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-
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- fun getPokemon(){
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-
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- viewModelScope.launch{
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-
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- val response: Response<List<Pokemon>> = repository.getPokemon()
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-
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- pokemons.value = response
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-
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- }
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-
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- }
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-
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- }
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-
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- ```
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-
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- Repository
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-
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- ```kotlin
186
-
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- class Repository {
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-
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-
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-
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- suspend fun getPokemon(): Response<List<Pokemon>> {
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-
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- val response: Response<List<Pokemon>> = RetrofitInstance.api.getPokemon()
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-
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- return response
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-
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- }
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-
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- }
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-
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- ```
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-
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- Adapterのコンストラクタ内のpokemonListをどのように書けばよいのか分かりませんでした。型を上記のinterfaceと同じResponse<List<Pokemon>>にした場合、リストの中身を参照できず、onBindViewHolder等で怒られてしまいます。
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-
205
- ```kotlin
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-
207
- class PokemonAdapter(private var context: Context, private var pokemonList: List<Pokemon>) :
208
-
209
- RecyclerView.Adapter<PokemonAdapter.PokemonHolder>() {
210
-
211
-
212
-
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- inner class PokemonHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
214
-
215
- var pokeImage: ImageView
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-
217
- var pokeName: TextView
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-
219
-
220
-
221
- init {
222
-
223
- pokeImage = itemView.findViewById(R.id.img_pokemon)
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-
225
- pokeName = itemView.findViewById(R.id.name_pokemon)
226
-
227
- }
228
-
229
- }
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-
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-
232
-
233
- override fun onCreateViewHolder(
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-
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- parent: ViewGroup,
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-
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- viewType: Int
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-
239
- ): PokemonAdapter.PokemonHolder {
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-
241
- val view = LayoutInflater.from(parent.context).inflate(R.layout.row_pokemon, parent, false)
242
-
243
- return PokemonHolder(view)
244
-
245
- }
246
-
247
-
248
-
249
- override fun onBindViewHolder(holder: PokemonAdapter.PokemonHolder, position: Int) {
250
-
251
- holder.pokeName.text = pokemonList[position].name
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-
253
- Glide.with(context).load(pokemonList[position].img).into(holder.pokeImage)
254
-
255
- }
256
-
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-
258
-
259
- override fun getItemCount(): Int {
260
-
261
- return pokemonList.size
262
-
263
- }
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-
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-
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-
267
- fun setPokemonList(newList: List<Pokemon>) {
268
-
269
- pokemonList = newList
270
-
271
- notifyDataSetChanged()
272
-
273
- }
274
-
275
-
276
-
277
- }
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-
279
- ```
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-
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-
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-
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225
 
@@ -292,17 +232,7 @@
292
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295
- ・以下のように、data classを新しく定義してみるが、上記と同様にAdaoterをかくことができなかった。
235
+ ・新しくdata classを定義してみるが、上記と同様にAdaoterをかくことができなかった。
296
-
297
- ```kotlin
298
-
299
- data class PokemonList(
300
-
301
- var pokemon: List<Pokemon>? = null
302
-
303
- )
304
-
305
- ```
306
236
 
307
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