Programming Android With Kotlin O 39-reilly Pdf -

class Person(val name: String, var age: Int) { fun greet() { println("Hello, $name!") } }

class ApiService { fun fetchData(): Call<Data> { val retrofit = Retrofit.Builder() .baseUrl("https://api.example.com/") .addConverterFactory(GsonConverterFactory.create()) .build()

val api = retrofit.create(Api::class.java) return api.fetchData() } }

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