PeopleInSpace

Minimal Kotlin Multiplatform project using Jetpack Compose and SwiftUI

It makes use of basic API (http://open-notify.org/Open-Notify-API/People-In-Space/) to show list of people currently in space (inspired by https://kousenit.org/2019/12/19/a-few-astronomical-examples-in-kotlin/)! The list is shown on Android using Jetpack Compose and on iOS using SwiftUI

Note: You need to use Android Studio v4.0 (currently on Canary 6). Have tested on XCode v11.3

SwiftUI Code

struct ContentView: View {
    @ObservedObject var peopleInSpaceViewModel = PeopleInSpaceViewModel(repository: PeopleInSpaceRepository())

    var body: some View {
        NavigationView {
            List(peopleInSpaceViewModel.people, id: \.name) { person in
                PersonView(person: person)
            }
            .navigationBarTitle(Text("PeopleInSpace"), displayMode: .large)
            .onAppear(perform: {
                self.peopleInSpaceViewModel.fetch()
            })
        }
    }
}

struct PersonView : View {
    var person: Assignment

    var body: some View {
        HStack {
            VStack(alignment: .leading) {
                Text(person.name).font(.headline)
                Text(person.craft).font(.subheadline)
            }
        }
    }

Jetpack Compose code

class MainActivity : AppCompatActivity() {
    private val peopleInSpaceViewModel: PeopleInSpaceViewModel by viewModel()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            mainLayout(peopleInSpaceViewModel)
        }
    }
}

@Composable
fun mainLayout(peopleInSpaceViewModel: PeopleInSpaceViewModel) {
    MaterialTheme {
        val people = +observe(peopleInSpaceViewModel.peopleInSpace)
        Column {
            people?.forEach { person ->
                Row(person)
            }
        }
    }
}


@Composable
fun Row(person: Assignment) {
    Padding(16.dp) {
        Text(text = "${person.name} (${person.craft})")
    }
}

Languages, libraries and tools used

• Kotlin
• Kotlin Corooutines
• Kotlin Serialization
• Ktor client library
• Android Architecture Components
• Koin
• Jetpack Compose
• SwiftUI