Entry Point

The entry point of your Swift Android application is defined in the App.swift file located in the Sources/App directory:

📦 Project Root
├── 📄 Package.swift
└── 📂 Sources
    └── 📂 App
        └── 📄 App.swift

This file imports the Droid framework, defines @main class of your app, and configures lifecycle, gradle dependencies, and manifest.

import Droid

@main
public final class App: DroidApp {
    @AppBuilder public override var body: Content {
        Lifecycle.didFinishLaunching{
            App.setLogLevel(.debug)
            App.setInnerLogLevel(.debug)
            Log.i("🚀 didFinishLaunching")
        }
        Manifest
            .usesPermissions(.camera)
            .usesFeatures(.hardwareCamera)
            .application {
                .allowBackup()
                .icon("@mipmap/ic_launcher")
                .roundIcon("@mipmap/ic_launcher_round")
                .label("My app")
                .activities(
                    MainActivity.self,
                    SecondActivity.self,
                    ThirdActivity.self,
                    FourthActivity.self
                )
            }
        GradleDependencies
            .implementation("com.some.company:library:1.0.0")
            .debugImplementation("com.some.company:library:1.0.0-nightly")
            .testImplementation("com.some.company:test-library:1.0.0")
    }
}

Lifecycle

This allows catching different lifecycle events of your application.

Only didFinishLaunching is currently supported.

Manifest

It represents the → AndroidManifest.xml in a convenient declarative way.

Swift Stream IDE then generates the corresponding XML file during the build process.

Head to → manifest section for more details.

Gradle Dependencies

You can declare additional Gradle dependencies for your app directly as shown above.

But most of them are automatically managed based on the components you use in your Swift code. For example, once you use Android X components, the corresponding dependencies are added automatically, same for the Material, Flexbox, etc.