get Lat Lang from a place_id returned by autocomplete place api

Question

I am searching the place in my apps using the google autocomplete place api and now I want to get latitude and longitude of the place that i have searched. How to get latitude a

Answer 1

This snippet allows obtain the latitude and longitude of a place according to the identifier back into the auto complete

public class PlacesDetails {
  private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place";
  private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
  private static final String TYPE_DETAIL = "/details";
  private static final String OUT_JSON = "/json";

  //private static final String API_KEY = "------------ make your specific key ------------; // cle pour le serveur         
  public PlacesDetails() {
    // TODO Auto-generated constructor stub
  }
  public ArrayList < Double > placeDetail(String input) {
    ArrayList < Double > resultList = null;

    HttpURLConnection conn = null;
    StringBuilder jsonResults = new StringBuilder();
    try {
      StringBuilder sb = new StringBuilder(PLACES_API_BASE + TYPE_DETAIL + OUT_JSON);
      sb.append("?placeid=" + URLEncoder.encode(input, "utf8"));
      sb.append("&key=" + API_KEY);
      URL url = new URL(sb.toString());
      //Log.e("url", url.toString());
      System.out.println("URL: " + url);
      System.out.println("******************************* connexion au serveur *****************************************");
      //Log.e("nous sommes entrai de test la connexion au serveur", "test to connect to the api");
      conn = (HttpURLConnection) url.openConnection();
      InputStreamReader in = new InputStreamReader(conn.getInputStream());

      // Load the results into a StringBuilder
      int read;
      char[] buff = new char[1024];
      while ((read = in .read(buff)) != -1) {
        jsonResults.append(buff, 0, read);
      }
      System.out.println("le json result" + jsonResults.toString());
    } catch (MalformedURLException e) {
      //Log.e(LOG_TAG, "Error processing Places API URL", e);
      return resultList;
    } catch (IOException e) {
      //Log.e(LOG_TAG, "Error connecting to Places API", e);
      return resultList;
    } finally {
      if (conn != null) {
        conn.disconnect();
      }
      System.out.println("******************************* fin de la connexion*************************************************");
    }

    try {
      // Create a JSON object hierarchy from the results
      //Log.e("creation du fichier Json", "creation du fichier Json");
      System.out.println("fabrication du Json Objet");
      JSONObject jsonObj = new JSONObject(jsonResults.toString());
      //JSONArray predsJsonArray = jsonObj.getJSONArray("html_attributions");
      JSONObject result = jsonObj.getJSONObject("result").getJSONObject("geometry").getJSONObject("location");
      System.out.println("la chaine Json " + result);
      Double longitude = result.getDouble("lng");
      Double latitude = result.getDouble("lat");
      System.out.println("longitude et latitude " + longitude + latitude);
      resultList = new ArrayList < Double > (result.length());
      resultList.add(result.getDouble("lng"));
      resultList.add(result.getDouble("lat"));
      System.out.println("les latitude dans le table" + resultList);

    } catch (JSONException e) {
      ///Log.e(LOG_TAG, "Cannot process JSON results", e);
    }

    return resultList;
  }
  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    PlacesDetails pl = new PlacesDetails();
    ArrayList < Double > list = new ArrayList < Double > ();
    list = pl.placeDetail("ChIJbf7h4osSYRARi8SBR0Sh2pI");
    System.out.println("resultat de la requette" + list.toString());
  }
}