Marker not moving on map even after rerendering - react-native

Question

I am fetching coordinates from my database every 5 seconds, and my marker is dynamic, this is my render method
console.log('render'+this.state.driverLocation.latitude +' '+this.state.driverLocation.longitude);
let marker = null;
marker = <MapView.Marker title='This is you' coordinate={this.state.driverLocation } />;
return (
<View style={styles.container}>
<MapView
initialRegion={this.state.focusedLocation}
region={!this.state.locationChosen ? this.state.focusedLocation : null}
style={styles.map}
onPress={this.pickLocationHandler}
ref={ref => this.map = ref}
>
{marker}
</MapView>
The log statement in render shows driverLocation changes every 5 sec as it should but the marker stays at the initial position (coordinates given while defining state).
Is there any problem with my code? Do I need to add something? Any help would be appreciated.

Answer 1

The problem was that android relies only on the key to change in order to update the custom marker and it can be solved by assigning a random key to the marker every time there's a need for rerendering.
So, something like this:
marker = <MapView.Marker
title='This is you'
coordinate={this.state.driverLocation}
key={ this.GenerateRandomNumber() }
} />;
While:
GenerateRandomNumber=()=>
{
var RandomNumber = Math.floor(Math.random() * 100) + 1 ;
return RandomNumber;
}