Steps

1. Create two files ReverseGeocodingPackage.java and ReverseGeocodingModule.java under your main android  project.
2. Add below code in ReverseGeocodingPackage.java

3. Add below code in ReverseGeocodingModule.java

4. Now, in the React- Native project you can call the above native code by importing  NativeModules package.
5. To fetch latitude and longitude, we have used ‘react-native-geolocation-service’.       

import Geolocation from 'react-native-geolocation-service';

import {
NativeModules
} from 'react-native';

import ReverseGeocoding from '../../../ReverseGeocoding';

async userGeolocation() {

console.log("userGeolocation")

Geolocation.getCurrentPosition(async (info) =>

{

let latitude = info.coords.latitude;

let longitude = info.coords.longitude;

let timestamp = info.timestamp;

console.log("timestamp: " + timestamp)

this.setState({
timestamp
})

try {

if (Platform.OS === 'ios')

{

let data = await ReverseGeocodingNative.addressFromLatLon(latitude, longitude)

console.log("latLong: " + JSON.stringify(data))

console.log(data.City + ", " + data.State)

let location = data.City + ", " + data.State;

this.setState({
location
})

} else

{

let data = await ReverseGeocoding.addressFromLatLon(latitude, longitude)

console.log("latLong: " + JSON.stringify(data))

let location = data

this.setState({
location
})

}

return

} catch (e)

{

console.log("latLOng error: " + e)

return false

}

}

);

}