How to get GPS location in react-native-maps
<p>My react-native app is using <a href="https://github.com/airbnb/react-native-maps" rel="nofollow noreferrer"><code>react-native-maps</code></a> to display a Google Maps and a marker. A styled <code>View</code> is used as the location marker that has a fixed position on the device screen.</p>

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

<pre><code>&lt;MapView
    ref='map'
    initialRegion={{
        latitude: LATITUDE,
        longitude: LONGITUDE,
        latitudeDelta: LATITUDE_DELTA,
        longitudeDelta: LONGITUDE_DELTA,
    }}
    showsUserLocation={true}
&gt;&lt;/MapView&gt;

&lt;View style={styles.markerContainer}&gt;
    &lt;View style={styles.marker}&gt;
    &lt;/View&gt;
&lt;/View&gt;
</code></pre>

<p><strong>styles</strong></p>

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