Created
June 28, 2023 20:30
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Save theSeafarer/bfe4c3eb1a3c300e6fb029a2341f0391 to your computer and use it in GitHub Desktop.
A quick and dirty solution to use [osmdroid/osmdroid]'s MapView in Jetpack Compose.
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import androidx.compose.runtime.Composable | |
import androidx.compose.runtime.DisposableEffect | |
import androidx.compose.runtime.getValue | |
import androidx.compose.runtime.mutableStateOf | |
import androidx.compose.runtime.remember | |
import androidx.compose.runtime.setValue | |
import androidx.compose.ui.Modifier | |
import androidx.compose.ui.platform.LocalLifecycleOwner | |
import androidx.compose.ui.viewinterop.AndroidView | |
import androidx.lifecycle.Lifecycle | |
import androidx.lifecycle.LifecycleEventObserver | |
import org.osmdroid.tileprovider.tilesource.TileSourceFactory | |
import org.osmdroid.views.MapView | |
@Composable | |
fun OsmMap( | |
modifier: Modifier = Modifier, | |
update: MapView.() -> Unit | |
) { | |
var onPause: (() -> Unit)? by remember { mutableStateOf(null) } | |
var onResume: (() -> Unit)? by remember { mutableStateOf(null) } | |
val lifecycleOwner = LocalLifecycleOwner.current | |
DisposableEffect(lifecycleOwner) { | |
val observer = LifecycleEventObserver { _, event -> | |
when (event) { | |
Lifecycle.Event.ON_PAUSE -> onPause?.invoke() | |
Lifecycle.Event.ON_RESUME -> onResume?.invoke() | |
else -> {} | |
} | |
} | |
lifecycleOwner.lifecycle.addObserver(observer) | |
onDispose { lifecycleOwner.lifecycle.removeObserver(observer) } | |
} | |
AndroidView( | |
factory = { | |
val mapView = MapView(it) | |
mapView.setTileSource(TileSourceFactory.MAPNIK) | |
onPause = { mapView.onPause() } | |
onResume = { mapView.onResume() } | |
mapView | |
}, | |
modifier = modifier, | |
update = { | |
it.update() | |
it.invalidate() | |
}, | |
) | |
} |
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