Android get lat and long from address

You can use the Google Geocoder service in the Google Maps API to convert from your location name to a latitude and longitude. So you need some code like

The idea is simple. Make a request to Google Map server and it will return an JSON or XML. Then, parse the JSON to get Lat and Long.

 I have used Google Maps API Here.


    // JSON Node names
    private static final String TAG_RESULTS = "results";
    private static final String TAG_GEOMETRY = "geometry";
    private static final String TAG_VIEWPORT = "viewport";
    private static final String TAG_NORTHEAST = "northeast";
    private static final String TAG_LAT = "lat";
    private static final String TAG_LNG = "lng";
    // contacts JSONArray
    JSONArray results = null;

Android get lat and long from address

// Creating JSON Parser instance
        JSONParser jParser = new JSONParser();

        address = "Rajkot, Gujarat, India";

        address = address.replaceAll(" ", "%20");
        url = "http://maps.googleapis.com/maps/api/geocode/json?address="
                + address + "&sensor=true";

        // getting JSON string from URL
        JSONObject json = jParser.getJSONFromUrl(url);

        try {
            // Getting Array of results
            results = json.getJSONArray(TAG_RESULTS);

            Toast.makeText(getApplication(),
                    "Number of results : " + results.length(),
                    Toast.LENGTH_LONG).show();

            for (int i = 0; i < results.length(); i++) {
                JSONObject r = results.getJSONObject(i);

                // geometry and location is again JSON Object
                JSONObject geometry = r.getJSONObject(TAG_GEOMETRY);

                JSONObject viewport = geometry.getJSONObject(TAG_VIEWPORT);

                JSONObject northest = viewport.getJSONObject(TAG_NORTHEAST);

                String lat = northest.getString(TAG_LAT);
                String lng = northest.getString(TAG_LNG);

                tvlat.setText(lat);
                tvlng.setText(lng);
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }


JSONParser.java

public class JSONParser {

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";

    // constructor
    public JSONParser() {

    }

    public JSONObject getJSONFromUrl(String url) {

        // Making HTTP request
        try {
            // defaultHttpClient
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);

            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();
            is = httpEntity.getContent();           

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());
        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON String
        return jObj;

    }
}


 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

Android Google Mapview

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
 
 
  <TextView android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Waiting for location..."
    android:id="@+id/lblLocationInfo"/>
  <!-- <1> -->
 
 
  
<com.google.android.maps.MapView android:id="@+id/mapview"
   android:apiKey="0dv9akiSW0I8Vvu5Ht_ScUSAEA6tngHm7Sta1ZA"      
    android:enabled="true"
   
    android:clickable="true"
    android:focusableInTouchMode="true"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    />

   
</LinearLayout>

map.java

public class map extends MapActivity implements LocationListener { //<1>
     
      private static final String TAG = "LocationActivity";

      LocationManager locationManager; //<2>
      Geocoder geocoder; //<3>
      TextView locationText;
      MapView map; 
      MapController mapController; //<4>
     
     
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        locationText = (TextView)this.findViewById(R.id.lblLocationInfo);
        map = (MapView)this.findViewById(R.id.mapview);
        map.setBuiltInZoomControls(true);
       
        mapController = map.getController(); //<4>
        mapController.setZoom(16);
       
        locationManager = (LocationManager)this.getSystemService(LOCATION_SERVICE); //<2>
       
        geocoder = new Geocoder(this); //<3>
       
        Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); //<5>
        if (location != null) {
          Log.d(TAG, location.toString());
          this.onLocationChanged(location); //<6>
        }
      }

     
      protected void onResume() {
        super.onResume();
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 10, this); //<7>
      }

     
      protected void onPause() {
        super.onPause();
        locationManager.removeUpdates(this); //<8>
      }

     
      public void onLocationChanged(Location location) { //<9>
        Log.d(TAG, "onLocationChanged with location " + location.toString());
        String text = String.format("Lat:\t %f\nLong:\t %f\nAlt:\t %f\nBearing:\t %f", location.getLatitude(),
                      location.getLongitude(), location.getAltitude(), location.getBearing());
        this.locationText.setText(text);
       
        try {
          List<Address> addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 10); //<10>
          for (Address address : addresses) {
            this.locationText.append("\n" + address.getAddressLine(0));
          }
         
          int latitude = (int)(location.getLatitude() * 1000000);
          int longitude = (int)(location.getLongitude() * 1000000);

          GeoPoint point = new GeoPoint(latitude,longitude);
          mapController.animateTo(point); //<11>
         
        } catch (IOException e) {
          Log.e("LocateMe", "Could not get Geocoder data", e);
        }
      }

   
    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }

   
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub
       
    }

   
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub
       
    }

   
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub
       
    }

    }

AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<uses-library android:name="com.google.android.maps" />