How to get GPS location in react-native-maps

Question

My react-native app is using react-native-maps to display a Google Maps and a marker. A styled View is used as the location marker that has a fixed position on the device screen.

Question: How can we get the GPS coordinates (lat/lng) of the marker, at say the bottom left corner of the <View style={styles.marker}> component?

<MapView
    ref='map'
    initialRegion={{
        latitude: LATITUDE,
        longitude: LONGITUDE,
        latitudeDelta: LATITUDE_DELTA,
        longitudeDelta: LONGITUDE_DELTA,
    }}
    showsUserLocation={true}
></MapView>

<View style={styles.markerContainer}>
    <View style={styles.marker}>
    </View>
</View>

styles

var deviceHeight = Dimensions.get('window').height;
StyleSheet.create({
    markerContainer: {
        bottom: deviceHeight/2.2,
        position: 'absolute',
        left: 0,
        right: 0,
    },
})

Answer 1

<MapView
    ref='map'
    initialRegion={{
        latitude: LATITUDE,
        longitude: LONGITUDE,
        latitudeDelta: LATITUDE_DELTA,
        longitudeDelta: LONGITUDE_DELTA,
    }}
    showsUserLocation={true}


**onUserLocationChange={(e)=>console.log(e.nativeEvent.coordinate)}**
></MapView>

<View style={styles.markerContainer}>
    <View style={styles.marker}>
    </View>
</View>