如何在Google Maps api 2 android中反转地理编码

我想在我的应用程序中使用map api做反向地理编码。但是我不知道如何做到这一点?任何想法?

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使用地理编码器 :

Geocoder geoCoder = new Geocoder(context); List<Address> matches = geoCoder.getFromLocation(latitude, longitude, 1); Address bestMatch = (matches.isEmpty() ? null : matches.get(0)); 

这是我的工作原理

 MarkerOptions markerOptions; Location myLocation; Button btLocInfo; String selectedLocAddress; private GoogleMap myMap; LatLng latLng; LatLng tmpLatLng; @Override public void onMapLongClick(LatLng point) { // Getting the Latitude and Longitude of the touched location latLng = point; // Clears the previously touched position myMap.clear(); // Animating to the touched position myMap.animateCamera(CameraUpdateFactory.newLatLng(latLng)); // Creating a marker markerOptions = new MarkerOptions(); // Setting the position for the marker markerOptions.position(latLng); // Adding Marker on the touched location with address new ReverseGeocodingTask(getBaseContext()).execute(latLng); //tmpLatLng = latLng; btLocInfo.setEnabled(true); btLocInfo.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub double[] coordinates={tmpLatLng.latitude/1E6,tmpLatLng.longitude/1E6}; double latitude = tmpLatLng.latitude; double longitude = tmpLatLng.longitude; Log.i("selectedCoordinates", latitude + " " + longitude); Log.i("selectedLocAddress", selectedLocAddress); } }); } private class ReverseGeocodingTask extends AsyncTask<LatLng, Void, String>{ Context mContext; public ReverseGeocodingTask(Context context){ super(); mContext = context; } // Finding address using reverse geocoding @Override protected String doInBackground(LatLng... params) { Geocoder geocoder = new Geocoder(mContext); double latitude = params[0].latitude; double longitude = params[0].longitude; List<Address> addresses = null; String addressText=""; try { addresses = geocoder.getFromLocation(latitude, longitude,1); Thread.sleep(500); if(addresses != null && addresses.size() > 0 ){ Address address = addresses.get(0); addressText = String.format("%s, %s, %s", address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "", address.getLocality(), address.getCountryName()); } } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } selectedLocAddress = addressText; return addressText; } @Override protected void onPostExecute(String addressText) { // Setting the title for the marker. // This will be displayed on taping the marker markerOptions.title(addressText); // Placing a marker on the touched position myMap.addMarker(markerOptions); } } 

您可以通过两种方式进行反向地理编码

  • 地理编码
  • Google API

地理编码器它应该在一个单独的线程中执行:

 private class FindPlaces extends AsyncTask<String, Void, List<Address>> { @Override protected List<Address> doInBackground(String... params) { if (act == null) this.cancel(true); Geocoder geocoder = new Geocoder(act, Locale.getDefault()); try { addresses = geocoder.getFromLocation( Double.parseDouble(params[0]), Double.parseDouble(params[1]), result); } catch (IOException e) { e.printStackTrace(); } return addresses; } @Override protected void onPostExecute(List<Address> addresses) { super.onPostExecute(addresses); if (act == null) return; if (addresses == null || addresses.size() == 0) { Toast.makeText(act, "No location found", Toast.LENGTH_SHORT) .show(); return; } address = addresses.get(0); String aLine = ""; for (int addr = 0; addr <= address.getMaxAddressLineIndex() - 2; addr++) { aLine = aLine.length() > 0 ? aLine + ", " + String.valueOf(address.getAddressLine(addr)) : String .valueOf(address.getAddressLine(addr)); } address.setAddressLine(0, aLine); if (act == null) return; } } 

Google API 1)在Google控制台中启用Google地图地理编码API 2)在此url中连接您的latlong https://maps.googleapis.com/maps/api/geocode/json?latlng=

例如: https : //maps.googleapis.com/maps/api/geocode/json? latlng = youlatitude,yourlongitude & key =yourapikey

用你的latlog调用下面的asyntask这对我有用..

 public class ReverseGecoding extends AsyncTask<Double, Void, String> { Context context;** private Address address; private String GEOCODINGKEY = "&key=YourKey"; private String REVERSE_GEOCODING_URL = "https://maps.googleapis.com/maps/api/geocode/json?latlng="; public ReverseGecoding(Context context) { this.context = context; this.listener = listener; } @Override protected String doInBackground(Double... params) { if (params[0] != null) { String result = ""; try { String mUrl = REVERSE_GEOCODING_URL + params[0] + "," + params[1] + GEOCODINGKEY; URL url = new URL(mUrl); HttpURLConnection httpsURLConnection = (HttpURLConnection) url.openConnection(); httpsURLConnection.setReadTimeout(10000); httpsURLConnection.setConnectTimeout(15000); httpsURLConnection.setDoInput(true); httpsURLConnection.setRequestMethod("GET"); httpsURLConnection.connect(); int mStatus = httpsURLConnection.getResponseCode(); if (mStatus == 200) return readResponse(httpsURLConnection.getInputStream()).toString(); return result; } catch (Exception e) { e.printStackTrace(); } return null; } private static StringBuilder readResponse(InputStream inputStream) throws IOException, NullPointerException { BufferedReader r = new BufferedReader(new InputStreamReader(inputStream)); StringBuilder stringBuilder = new StringBuilder(); String line; while ((line = r.readLine()) != null) { stringBuilder.append(line); } return stringBuilder; } }