does any1 know how to specify initial camera position for th kotlinlang #compose

03/29/2022, 5:41 PM

does any1 know how to specify initial camera position for the map, based on a route? I can only do

position = CameraPosition.fromLatLngZoom

, which internally do

CameraUpdateFactory.newCameraPosition(value)

but i would like to use

CameraUpdateFactory.newLatLngBounds

using compose map library btw

03/29/2022, 9:08 PM

If you are able to create the bounds before the map loads, you can pass a

cameraPositionState

into the GoogleMap composable and call

cameraPositionState.move(yourBounds)

onMapLoaded

of the GoogleMap composable. If the bounds can change, you can call the same move function from where the new bounds get created

My rough code is:

var isMapLoaded by remember { mutableStateOf(false) }
        val cameraPositionState = rememberCameraPositionState()
        val mapWidth: Int
        val mapHeight: Int
        with(LocalDensity.current) {
            mapWidth = maxWidth.roundToPx()
            mapHeight = maxHeight.roundToPx()
        }
        val bounds = remember(currentLocation, mapMarkers) {
            getCameraUpdateForBounds(currentLocation, mapMarkers, mapWidth, mapHeight)?.apply {
                if (isMapLoaded) {
                    cameraPositionState.move(this)
                }
            }
        }
        GoogleMap(
            modifier = modifier,
            cameraPositionState = cameraPositionState,
            onMapLoaded = {
                isMapLoaded = true
                bounds?.let {
                    cameraPositionState.move(it)
                }
            }
        )

03/29/2022, 10:03 PM

For some reason, i tried that but it didnt move. I ended up using launchedEffect move inside the map content.