@nativescript/jetpack-compose

Jetpack Compose for NativeScript.

npm install @nativescript/jetpack-compose

Usage

Adjust App_Resources/Android/app.gradle to include your desired Jetpack Compose version and dependencies:

dependencies {
    def compose_version = "1.2.1"
    implementation "androidx.compose.ui:ui:$compose_version"
    // Tooling support (Previews, etc.)
    implementation "androidx.compose.ui:ui-tooling:$compose_version"

    // Add any other dependencies your Jetpack Compose UI needs
}

android {
    // other settings like targetSdk, etc.

    buildFeatures {
        compose true
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
    composeOptions {
        kotlinCompilerExtensionVersion '1.3.2'
    }
}

Create a Compose view

Any Kotlin file can be created in your App_Resources, for example:

• App_Resources/Android/src/main/java/BasicView.kt

class BasicView {
    data class ExampleUIState(
        val text: String = ""
    ) {}

    class ExampleViewModel(
    ) : ViewModel() {
        var uiState by mutableStateOf(ExampleUIState())
    }

    var mViewModel = ExampleViewModel()

    fun generateComposeView(view: ComposeView): ComposeView {
        return view.apply {
            setContent {
                MaterialTheme {
                    val uiState = mViewModel.uiState;
                    Text(uiState.text)
                }
            }
        }
    }

    fun updateData(value: Map<Any, Any>) {
        val v = value["data"] as String;
        onEvent?.invoke(v)
        mViewModel.uiState = ExampleUIState(v);
    }

    var onEvent: ((String) -> Unit)? = null
}

Register your Compose view

This can be done in the bootstrap file (often app.ts or main.ts) or even the view component that needs it.

• app.ts

import { registerJetpackCompose, ComposeDataDriver } from '@nativescript/jetpack-compose';

// A. You can generate types for your own Compose Provider with 'ns typings android --aar {path/to/{name}.aar}'
// B. Otherwise you can ignore by declaring the package resolution path you know you provided
declare var com;
registerJetpackCompose('flyingHearts', (view) => new ComposeDataDriver(new com.example.FlyingHearts(), view));

Use Compose view with any NativeScript layout

This illustrates what is often called a "vanilla" flavored NativeScript app. However, you can use this plugin with any flavor (Angular, React, Svelte, Vue, etc.)

<Page xmlns="http://schemas.nativescript.org/tns.xsd" navigatingTo="navigatingTo" class="page" xmlns:jc="@nativescript/jetpack-compose">
  <StackLayout>
    <jc:JetpackCompose composeId="flyingHearts" composeEvent="{{ onEvent }}" data="{{ text }}"/>
  </StackLayout>
</Page>

To use with Angular

import { registerElement } from '@nativescript/angular'
import { JetpackCompose } from '@nativescript/jetpack-compose'

registerElement('JetpackCompose', () => JetpackCompose)

It can now be used within any Angular component, eg:

<StackLayout>
    <JetpackCompose composeId="flyingHearts" (composeEvent)="onEvent($event)" [data]="data"></JetpackCompose>
</StackLayout>

Credits

NativeScript is proudly supported by Valor Software as official partners. We are proud to offer guidance, consulting, and development assistance in all things NativeScript.

Contact Valor for assistance.

License

MIT