使用 Map 查找附近的特定地点

1 回答

• 1

  我认为你的api密钥不匹配

  看到你的截图后......你应该做几件事：

  • 首先，您应该在开发人员控制台中为Web服务启用Google place api ..它列在 Google Maps APIs 下

  

  • 如果你想从浏览器测试你的api，你不应该对api key有任何限制..在限制中选择none .

  • 还使用此链接测试您附近的地方api：我认为您的网址中缺少某些内容

  使用这个：https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=-33.8670522,151.1957362&radius=500&types=food&key=[your_api_key]

  以下是在Android附近放置的简单示例 . 首先，为API生成查询字符串：

  public StringBuilder sbMethod() {
  
      //use your current location here
      double mLatitude = 37.77657;
      double mLongitude = -122.417506;
  
      StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
      sb.append("location=" + mLatitude + "," + mLongitude);
      sb.append("&radius=5000");
      sb.append("&types=" + "restaurant");
      sb.append("&sensor=true");
      sb.append("&key=******* YOUR API KEY****************");
  
      Log.d("Map", "api: " + sb.toString());
  
      return sb;
  }
  

  以下是用于查询Places API的 AsyncTask ：

  private class PlacesTask extends AsyncTask<String, Integer, String> {
  
      String data = null;
  
      // Invoked by execute() method of this object
      @Override
      protected String doInBackground(String... url) {
          try {
              data = downloadUrl(url[0]);
          } catch (Exception e) {
              Log.d("Background Task", e.toString());
          }
          return data;
      }
  
      // Executed after the complete execution of doInBackground() method
      @Override
      protected void onPostExecute(String result) {
          ParserTask parserTask = new ParserTask();
  
          // Start parsing the Google places in JSON format
          // Invokes the "doInBackground()" method of the class ParserTask
          parserTask.execute(result);
      }
  }
  

  这是 downloadURL （）方法：

  private String downloadUrl(String strUrl) throws IOException {
      String data = "";
      InputStream iStream = null;
      HttpURLConnection urlConnection = null;
      try {
          URL url = new URL(strUrl);
  
          // Creating an http connection to communicate with url
          urlConnection = (HttpURLConnection) url.openConnection();
  
          // Connecting to url
          urlConnection.connect();
  
          // Reading data from url
          iStream = urlConnection.getInputStream();
  
          BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
  
          StringBuffer sb = new StringBuffer();
  
          String line = "";
          while ((line = br.readLine()) != null) {
              sb.append(line);
          }
  
          data = sb.toString();
  
          br.close();
  
      } catch (Exception e) {
          Log.d("Exception while downloading url", e.toString());
      } finally {
          iStream.close();
          urlConnection.disconnect();
      }
      return data;
  }
  

  ParserTask 用于解析JSON结果：

  private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String, String>>> {
  
      JSONObject jObject;
  
      // Invoked by execute() method of this object
      @Override
      protected List<HashMap<String, String>> doInBackground(String... jsonData) {
  
          List<HashMap<String, String>> places = null;
          Place_JSON placeJson = new Place_JSON();
  
          try {
              jObject = new JSONObject(jsonData[0]);
  
              places = placeJson.parse(jObject);
  
          } catch (Exception e) {
              Log.d("Exception", e.toString());
          }
          return places;
      }
  
      // Executed after the complete execution of doInBackground() method
      @Override
      protected void onPostExecute(List<HashMap<String, String>> list) {
  
          Log.d("Map", "list size: " + list.size());
          // Clears all the existing markers;
          mGoogleMap.clear();
  
          for (int i = 0; i < list.size(); i++) {
  
              // Creating a marker
              MarkerOptions markerOptions = new MarkerOptions();
  
              // Getting a place from the places list
              HashMap<String, String> hmPlace = list.get(i);
  
  
              // Getting latitude of the place
              double lat = Double.parseDouble(hmPlace.get("lat"));
  
              // Getting longitude of the place
              double lng = Double.parseDouble(hmPlace.get("lng"));
  
              // Getting name
              String name = hmPlace.get("place_name");
  
              Log.d("Map", "place: " + name);
  
              // Getting vicinity
              String vicinity = hmPlace.get("vicinity");
  
              LatLng latLng = new LatLng(lat, lng);
  
              // Setting the position for the marker
              markerOptions.position(latLng);
  
              markerOptions.title(name + " : " + vicinity);
  
              markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
  
              // Placing a marker on the touched position
              Marker m = mGoogleMap.addMarker(markerOptions);
  
          }
      }
  }
  

  最后使用方法为..

  StringBuilder sbValue = new StringBuilder(sbMethod());
  PlacesTask placesTask = new PlacesTask();
  placesTask.execute(sbValue.toString());
  

  回复于 2024-04-28T13:42:57+08:00