android - 如何在喷气背包数据存储中保存收集的经纬度

Question

当我移动地图时，新坐标是从 MutableStateFlow 收集的。我想通过将地图移动到 DataStore 来保存新坐标，但它无法正常工作并且地图已损坏。我该如何解决？

在 ViewModel 代码中，我有这三个函数用于 INITIALS VALUES 和 UPDATE LOCATION VALUES 和 SET LOCATION

private val _location = MutableStateFlow(getInitialLocation())
    val location: StateFlow<Location> = _location

   private fun getInitialLocation(): Location = let {
        Location("").let {
            it.latitude = 14.599168243865952
            it.longitude = 120.98413870283683
            it
        }
    }

fun updateLocation(latitude: Double, longitude: Double) {
        setLocation(Location("").let {
            it.latitude = latitude
            it.longitude = longitude
            it
        })
    }

    private fun setLocation(loc: Location) {
        _location.value = loc

    }

地图屏幕代码：

@Composable
private fun MapViewContainer(
    mapView: MapView,
    navigatorViewModel: PickLocationViewModel
) {
    val context = LocalContext.current
    val dataStore = CheckLocationIsSetDataStore(context = context)

    AndroidView(
        factory = { mapView }
    ) {
        mapView.getMapAsync { map ->
            map.apply {
                navigatorViewModel.apply {
                    
                    val location = location.value
                    val position = LatLng(location.latitude, location.longitude)
                    moveCamera(CameraUpdateFactory.newLatLngZoom(position, Constants.ZOOM_CAMERA))

                    setOnCameraIdleListener {
                        val cameraPosition = map.cameraPosition
                        updateLocation(
                            cameraPosition.target.latitude,
                            cameraPosition.target.longitude
                        )
                    }
                    viewModelScope.launch {
                        [e-mail]{ location ->
                    dataStore.set(CheckLocationIsSetModel(location.altitude, location.longitude))
                        }
                    }
                }
            }
        }
    }
}

数据存储类代码：

class CheckLocationIsSetDataStore @Inject constructor(private val context: Context) :
    IDataStore<CheckLocationIsSetModel, CheckLocationIsSetModel> {
    
    override val get: Flow<CheckLocationIsSetModel>
        get() = context.dataStore.data.catch { exception ->
            if (exception is IOException) {
                Log.e("DataStore Exception: ", exception.toString())
                emit(emptyPreferences())
            } else {
                throw exception
            }
        }.map { preferences ->
            CheckLocationIsSetModel(
                lat = preferences[DataStoreKeys.IS_LOCATION_LAT_SET_KEY]
                    ?: Constants.IF_LOCATION_LAT_NOT_SET,
                lng = preferences[DataStoreKeys.IS_LOCATION_LNG_SET_KEY]
                    ?: Constants.IF_LOCATION_LNG_NOT_SET
            )
        }

    override suspend fun set(param: CheckLocationIsSetModel?) {
        context.dataStore.edit { preferences ->
            preferences[DataStoreKeys.IS_LOCATION_LAT_SET_KEY] = param?.lat ?: 0.0
            preferences[DataStoreKeys.IS_LOCATION_LNG_SET_KEY] = param?.lng ?: 0.0
        }
    }
}

标签： androidlocationdatastore