plugins {
    ...
    id("com.google.devtools.ksp") version "2.0.0-1.0.23"
}

android { ... }

dependencies {
   ...

    // moshi for parsing the JSON format
    val moshi_version = "1.15.2"
    implementation ("com.squareup.moshi:moshi:$moshi_version")
    implementation ("com.squareup.moshi:moshi-kotlin:$moshi_version")
    ksp ("com.squareup.moshi:moshi-kotlin-codegen:$moshi_version")

    // retrofit for networking the Web Service
    implementation ("com.squareup.retrofit2:retrofit:2.11.0")
    implementation ("com.squareup.retrofit2:converter-moshi:2.11.0")
    implementation ("com.jakewharton.retrofit:retrofit2-kotlin-coroutines-adapter:0.9.2")
}

[
  {
    "id": "424905",
    "img_src": "https://mars.jpl.nasa.gov/msl-raw-images/msss/01000/mcam/1000MR0044631300503690E01_DXXX.jpg"
  },
  {
    "id": "424906",
    "img_src": "https://mars.jpl.nasa.gov/msl-raw-images/msss/01000/mcam/1000ML0044631300305227E03_DXXX.jpg"
  },
  ...
]

@JsonClass(generateAdapter = true)
data class Photo(
    val id: String,
    @Json(name = "img_src") val imgSrc: String  // JSONのキーに別名を定義
)

interface MarsService {
    @GET("photos")
    suspend fun getPhotos(): List<Photo>
}

object MarsApi {
    private val moshi = Moshi.Builder()
	    // 必要なアダプターを追加
	    // .add(アダプター)
        .build()
    private val retrofit = Retrofit.Builder()
        .baseUrl("https://android-kotlin-fun-mars-server.appspot.com/")
        .addConverterFactory(MoshiConverterFactory.create(moshi))
        .build()

    val service = retrofit.create(MarsService::class.java) // MarsServiceを返す
}

public final class MoshiConverterFactory extends Converter.Factory {
  public static MoshiConverterFactory create() {
    return create(new Moshi.Builder().build());
  }

  @SuppressWarnings("ConstantConditions") // Guarding public API nullability.
  public static MoshiConverterFactory create(Moshi moshi) {
    if (moshi == null) throw new NullPointerException("moshi == null");
    return new MoshiConverterFactory(moshi, false, false, false);
  }
  
  ...
}

    scope.launch(Dispatchers.IO) {
        val _photos = MarsApi.service.getPhotos()
        _photos.forEach {
            Log.i(TAG, "(Moshi) Retrofit Demo Photo = ${it}")
        }
    }

...

dependencies {
    ...
	
    // An image loading library for Android and Compose Multiplatform.
    implementation("io.coil-kt.coil3:coil-compose:3.1.0")
    implementation("io.coil-kt.coil3:coil-network-okhttp:3.1.0")
}

    private val marsPhotos = mutableStateOf(listOf<Photo>())

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            AppTheme {
                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
                    PhotoPanel(
                        marsPhotos = marsPhotos.value,
                        modifier = Modifier.padding(innerPadding)
                    )
                }
            }
        }

        lifecycleScope.launch(Dispatchers.IO) {
            marsPhotos.value = MarsApi.service.getPhotos()
        }
    }

@Composable
fun PhotoPanel(
    marsPhotos: List<Photo>,
    modifier: Modifier = Modifier
) {
    val _imgIndex = remember { mutableStateOf(0)}

    var _imgSrc =
        if(marsPhotos.isNotEmpty()) marsPhotos[_imgIndex.value].imgSrc
        else R.drawable.noimages_360x240
    AsyncImage(
        model = _imgSrc,
        contentDescription = null,
        modifier = modifier
            .clickable {
                _imgIndex.value =
                    if(_imgIndex.value >= marsPhotos.size) 0
                    else _imgIndex.value + 2
            },
        placeholder = painterResource(R.drawable.loading_360x240)
    )
}