SimpleComposeActivity.kt

class ComposeActivity : Activity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent { CraneWrapper { MyApp() } }
    }

    @Composable
    fun MyApp() {
        MaterialTheme {
            Text(text = "Hello world!", style = +themeTextStyle { h3 })
        }
    }
}