经纬度的当前位置在react-native中返回为[object object]

Question

我正在尝试从react-native（Android）中的纬度和经度中获取当前位置，我已经正确接收了纬度和经度，但是位置的结果返回为[object object]

constructor(props) {
  super(props);
  this.state = {
    latitude: null,
    longitude: null,
    error:null,
  };
}

componentDidMount() {
  navigator.geolocation.getCurrentPosition(
   (position) => {
     console.log("wokeeey");
     console.log(position);
     this.setState({
       latitude: position.coords.latitude,
       longitude: position.coords.longitude,
       error: null,
     });
   },
   (error) => this.setState({ error: error.message }),
   { enableHighAccuracy: false, timeout: 200000, maximumAge: 1000 },
  );
}


getData(){
  Geocoder.init("My_Api");
  Geocoder.from(this.state.latitude,this.state.longitude)
    .then(json => {
            var addressComponent = json.results[0].address_components[0];
        alert(addressComponent);
    })
    .catch(error => console.warn(error));
}