How to send GPS location (Latitude, Longitude) in the query bar?

Question

I need to make a simple Android application that sends the location of my smartphone every 25 seconds to a web application. My web application is online, and right now I can pass the value manually as follows:

http://mywebapp.com/coordinates/create?latitude=18.463108&longitude=-69.929117

I am an absolute beginner in Android development, so try to explain me step by step.

Answer 1

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• AndroidManifest.xml

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

• MainActivity.java public class MainActivity extends Activity { }

  public class MainActivity extends Activity {
  
      public double latitude;
      public double longitude;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          /* Use the LocationManager class to obtain GPS locations */
          LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
          LocationListener mlocListener = new MyLocationListener();
          mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
      }
  
      /* Class My Location Listener */
  
      public class MyLocationListener implements LocationListener {
  
          @Override
          public void onLocationChanged(Location loc) {
              latitude = loc.getLatitude();
              longitude = loc.getLongitude();
              String Text = "My current Latitude = " + latitude  + " Longitude = " + longitude;
              Toast.makeText( getApplicationContext(),Text,Toast.LENGTH_SHORT).show();
  
              SendQueryString(); // for send the  Query String of latitude and logintude to the webapp.
          }
  
  
  
          @Override
          public void onProviderDisabled(String provider) {   
              Toast.makeText( getApplicationContext(),"Gps Disabled",Toast.LENGTH_SHORT ).show();
          }
  
  
          @Override
          public void onProviderEnabled(String provider) {
              Toast.makeText( getApplicationContext(),"Gps Enabled",Toast.LENGTH_SHORT).show();
          }
  
  
          @Override
          public void onStatusChanged(String provider, int status, Bundle extras) {
          }
  
      }/* End of Class MyLocationListener */
  
  
      public void SendQueryString() {
          new Thread() {  
              public void run() {
  
                  String url = "http://mywebapp.com/coordinates/create?latitude=" + latitude +"&longitude=" + longitude;
  
                  try {
                      HttpClient Client = new DefaultHttpClient();
                      HttpGet httpget = new HttpGet(url);
                      Client.execute(httpget);
                  }
                  catch(Exception ex) {
                      String fail = "Fail!";
                      Toast.makeText( getApplicationContext(),fail,Toast.LENGTH_SHORT).show();
                  }
              }
          }.start();
      }
  }
  

: , new Thread() { public void run() {/*code here*/}}.start(); SendQueryString(), , Android ' t , . , .

Answer 2

:

LocationManager locMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locMan.requestLocationUpdates(
    LocationManager.GPS_PROVIDER, 0, 0, location listener);

. , .

:

public void onLocationChanged(Location location) {
if (location != null) {
    double lat = location.getLatitude();
    double long = location.getLongitude();
   }
}

http- , :

String url = "http://mywebapp.com/coordinates/createlatitude=" + lat +"&longitude=" + long;
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
httpClient.execute(httpGet);