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React Native ExpoでGoogleリバースジオコーディングを使用する方法

押すと携帯電話の現在の住所を返すボタンをアプリケーションに配置します。

緯度と経度を正しく返すことができ、このデータを react-native-geocoder ライブラリに取得したアドレスに変換できます。

私の現在のコードは次のようになります。

_import React, { Component } from 'react';
import { View, Text, Button } from 'react-native';
import Geocoder from 'react-native-geocoder';
 // 0.4.8

class GeolocationExample extends Component {
  constructor(props) {
    super(props);

    this.state = {
      latitude: null,
      longitude: null,
      error: null,
    };
  }

  refresh = () => {
    navigator.geolocation.getCurrentPosition(
      (position) => {
        this.setState({
          latitude: position.coords.latitude,
          longitude: position.coords.longitude,
          error: null,
        });
      },
      (error) => this.setState({ error: error.message }),
      { enableHighAccuracy: true, timeout: 20000, maximumAge: 1000 },
    );
  };

  render() {
    Geocoder.geocodePosition(this.state.latitude,this.state.longitude)
    return (
      <View style={{ flexGrow: 1, alignItems: 'center', justifyContent: 'center' }}>
        <Text>Latitude: {this.state.latitude}</Text>
        <Text>Longitude: {this.state.longitude}</Text>

        {this.state.error ? <Text>Error: {this.state.error}</Text> : null}
         <Button
          style={{ marginTop: 30 }}
          onPress={() => { this.refresh(); }}
          title="Refresh"
        />
      </View>
    );
  }
}

export default GeolocationExample;
_

Geocoder.geocodePosition(this.state.latitude,this.state.longitude)で理解したことから、アドレスが返されますが、そこからこのデータを取得する方法がわかりませんでした。

スナックのコード： https://snack.expo.io/rJhYwaG2Z

react-nativeexpo
6
Magas

LatLonの逆ジオコーディング用のライブラリは必要ありません。次のようにGoogle Maps APIを直接呼び出すことができます。

fetch('https://maps.googleapis.com/maps/api/geocode/json?address=' + myLat + ',' + myLon + '&key=' + myApiKey)
        .then((response) => response.json())
        .then((responseJson) => {
            console.log('ADDRESS GEOCODE is BACK!! => ' + JSON.stringify(responseJson));
})

（Google Maps APIキーを忘れずに入力してください!!）

結果オブジェクトには、そのLatLonのすべてのアドレスコンポーネントが含まれます。

結果の例

{"results":[{"address_components":[{"long_name":"540","short_name":"540","types":["street_number"]},{"long_name":"Avenida Alda Garrido","short_name":"Av. Alda Garrido","types":["route"]},{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]},{"long_name":"22640-000","short_name":"22640-000","types":["postal_code"]}],"formatted_address":"Av. Alda Garrido, 540 - Barra da Tijuca, Rio de Janeiro - RJ, 22640-000, Brazil","geometry":{"location":{"lat":-23.0077328,"lng":-43.315117},"location_type":"ROOFTOP","viewport":{"northeast":{"lat":-23.0063838197085,"lng":-43.3137680197085},"southwest":{"lat":-23.0090817802915,"lng":-43.3164659802915}}},"place_id":"ChIJfSac_7vQmwARNiQbMrnXe4E","types":["street_address"]},{"address_components":[{"long_name":"Apto 301","short_name":"Apto 301","types":["subpremise"]},{"long_name":"470","short_name":"470","types":["street_number"]},{"long_name":"Avenida Alda Garrido","short_name":"Av. Alda Garrido","types":["route"]},{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]},{"long_name":"22621-000","short_name":"22621-000","types":["postal_code"]}],"formatted_address":"Av. Alda Garrido, 470 - Apto 301 - Barra da Tijuca, Rio de Janeiro - RJ, 22621-000, Brazil","geometry":{"location":{"lat":-23.0079088,"lng":-43.3148068},"location_type":"ROOFTOP","viewport":{"northeast":{"lat":-23.0065598197085,"lng":-43.3134578197085},"southwest":{"lat":-23.0092577802915,"lng":-43.3161557802915}}},"place_id":"ChIJpQ8sq77QmwARA6fRe9QZWZ0","types":["establishment","lodging","point_of_interest"]},{"address_components":[{"long_name":"589","short_name":"589","types":["street_number"]},{"long_name":"Avenida Alda Garrido","short_name":"Av. Alda Garrido","types":["route"]},{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]},{"long_name":"22620-171","short_name":"22620-171","types":["postal_code"]}],"formatted_address":"Av. Alda Garrido, 589 - Barra da Tijuca, Rio de Janeiro - RJ, 22620-171, Brazil","geometry":{"location":{"lat":-23.0081304,"lng":-43.3147502},"location_type":"ROOFTOP","viewport":{"northeast":{"lat":-23.0067814197085,"lng":-43.3134012197085},"southwest":{"lat":-23.0094793802915,"lng":-43.3160991802915}}},"place_id":"ChIJr2eVq77QmwARA3U9jQNI5Z8","types":["establishment","premise"]},{"address_components":[{"long_name":"540","short_name":"540","types":["street_number"]},{"long_name":"Avenida Alda Garrido","short_name":"Av. Alda Garrido","types":["route"]},{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]},{"long_name":"22620-171","short_name":"22620-171","types":["postal_code"]}],"formatted_address":"Av. Alda Garrido, 540 - Barra da Tijuca, Rio de Janeiro - RJ, 22620-171, Brazil","geometry":{"location":{"lat":-23.0078265,"lng":-43.3151749},"location_type":"RANGE_INTERPOLATED","viewport":{"northeast":{"lat":-23.0064775197085,"lng":-43.3138259197085},"southwest":{"lat":-23.0091754802915,"lng":-43.3165238802915}}},"place_id":"EkRBdi4gQWxkYSBHYXJyaWRvLCA1NDAgLSBCYXJyYSBkYSBUaWp1Y2EsIFJpbyBkZSBKYW5laXJvIC0gUkosIEJyYXppbCIbEhkKFAoSCXvIbAC80JsAEXZMHH23Zf8TEJwE","types":["street_address"]},{"address_components":[{"long_name":"Avenida Alda Garrido","short_name":"Av. Alda Garrido","types":["route"]},{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]},{"long_name":"22620-171","short_name":"22620-171","types":["postal_code"]}],"formatted_address":"Av. Alda Garrido - Barra da Tijuca, Rio de Janeiro - RJ, 22620-171, Brazil","geometry":{"bounds":{"northeast":{"lat":-23.0077138,"lng":-43.3146692},"southwest":{"lat":-23.0080912,"lng":-43.3153903}},"location":{"lat":-23.0079025,"lng":-43.3150298},"location_type":"GEOMETRIC_CENTER","viewport":{"northeast":{"lat":-23.0065535197085,"lng":-43.3136807697085},"southwest":{"lat":-23.0092514802915,"lng":-43.3163787302915}}},"place_id":"ChIJe8hsALzQmwARd0wcfbdl_xM","types":["route"]},{"address_components":[{"long_name":"22620-400","short_name":"22620-400","types":["postal_code"]},{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"State of Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]}],"formatted_address":"Barra da Tijuca, Rio de Janeiro - State of Rio de Janeiro, 22620-400, Brazil","geometry":{"bounds":{"northeast":{"lat":-23.0078347,"lng":-43.3137711},"southwest":{"lat":-23.0118196,"lng":-43.3149785}},"location":{"lat":-23.0108544,"lng":-43.3146249},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":-23.0078347,"lng":-43.31302581970849},"southwest":{"lat":-23.0118196,"lng":-43.31572378029149}}},"place_id":"ChIJxyn3hb7QmwARggN-wB930Xo","types":["postal_code"]},{"address_components":[{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"State of Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]},{"long_name":"22620-171","short_name":"22620-171","types":["postal_code"]}],"formatted_address":"Barra da Tijuca, Rio de Janeiro - State of Rio de Janeiro, Brazil","geometry":{"bounds":{"northeast":{"lat":-23.0009429,"lng":-43.2977475},"southwest":{"lat":-23.0153102,"lng":-43.3294084}},"location":{"lat":-23.0093991,"lng":-43.3173933},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":-23.0009429,"lng":-43.2977475},"southwest":{"lat":-23.0153102,"lng":-43.3294084}}},"place_id":"ChIJ2zZsIqPQmwARquMCy3yno4Q","types":["postal_code","postal_code_prefix"]},{"address_components":[{"long_name":"Barra da Tijuca","short_name":"Barra da Tijuca","types":["political","sublocality","sublocality_level_1"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"State of Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]}],"formatted_address":"Barra da Tijuca, Rio de Janeiro - State of Rio de Janeiro, Brazil","geometry":{"bounds":{"northeast":{"lat":-22.9642374,"lng":-43.2844897},"southwest":{"lat":-23.0228827,"lng":-43.45027049999999}},"location":{"lat":-23.0003709,"lng":-43.36589499999999},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":-22.9642374,"lng":-43.2844897},"southwest":{"lat":-23.0228827,"lng":-43.45027049999999}}},"place_id":"ChIJXf62J0ramwARTg-e2NH2w2M","types":["political","sublocality","sublocality_level_1"]},{"address_components":[{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"State of Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]}],"formatted_address":"Rio de Janeiro - State of Rio de Janeiro, Brazil","geometry":{"bounds":{"northeast":{"lat":-22.7460201,"lng":-43.0990395},"southwest":{"lat":-23.0828927,"lng":-43.7965385}},"location":{"lat":-22.9112301,"lng":-43.4452148},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":-22.7460201,"lng":-43.0990395},"southwest":{"lat":-23.0828927,"lng":-43.7965385}}},"place_id":"ChIJC7UkQv5-mQAR7llshDwliPk","types":["administrative_area_level_2","political"]},{"address_components":[{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["locality","political"]},{"long_name":"Rio de Janeiro","short_name":"Rio de Janeiro","types":["administrative_area_level_2","political"]},{"long_name":"State of Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]}],"formatted_address":"Rio de Janeiro, State of Rio de Janeiro, Brazil","geometry":{"bounds":{"northeast":{"lat":-22.7460327,"lng":-43.0969042},"southwest":{"lat":-23.0822288,"lng":-43.7950599}},"location":{"lat":-22.9068467,"lng":-43.1728965},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":-22.7460327,"lng":-43.0969042},"southwest":{"lat":-23.0822288,"lng":-43.7950599}}},"place_id":"ChIJW6AIkVXemwARTtIvZ2xC3FA","types":["locality","political"]},{"address_components":[{"long_name":"State of Rio de Janeiro","short_name":"RJ","types":["administrative_area_level_1","political"]},{"long_name":"Brazil","short_name":"BR","types":["country","political"]}],"formatted_address":"State of Rio de Janeiro, Brazil","geometry":{"bounds":{"northeast":{"lat":-20.7632054,"lng":-40.9568207},"southwest":{"lat":-23.3689318,"lng":-44.8893205}},"location":{"lat":-22.9098755,"lng":-43.2094971},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":-20.7632054,"lng":-40.9568207},"southwest":{"lat":-23.3689318,"lng":-44.8893205}}},"place_id":"ChIJw4riypQYmAAR0IMFwRrDSQM","types":["administrative_area_level_1","political"]},{"address_components":[{"long_name":"Brazil","short_name":"BR","types":["country","political"]}],"formatted_address":"Brazil","geometry":{"bounds":{"northeast":{"lat":5.2717863,"lng":-28.650543},"southwest":{"lat":-34.0891,"lng":-73.9828169}},"location":{"lat":-14.235004,"lng":-51.92528},"location_type":"APPROXIMATE","viewport":{"northeast":{"lat":5.2717863,"lng":-28.650543},"southwest":{"lat":-34.0891,"lng":-73.9828169}}},"place_id":"ChIJzyjM68dZnAARYz4p8gYVWik","types":["country","political"]}],"status":"OK"}
23
R.Bravo

要件を理解するには、Google APIの回答で完了します。

しかし、今では無料ではありません。Googleアカウントへの請求以外に無料の制限を超えて使用することはできません。

ですから、あなたが React-Native-Geocoder で作業している場合は、次のように実装できます：

var pos = {
  lat: 40.7809261,
  lng: -73.9637594
};

Geocoder.geocodePosition(pos).then(res => {
    alert(res[0].formattedAddress);
})
.catch(error => alert(error));
4
Kirankumar Dafda

Location.reverseGeocodeAsync（location）

0
Олег Марьин