If you want to make your code run even if your application is not open, you need services for that.
A service runs in the background, If you want the latitude and longitude details you will need a LocationListener for that.
If you need your application to send details every 3 minutes, you will need to set a timer and get the lat and long and then send it using a JSON.
How to Create A Service
The Manifest File
<service
android:name="MyService"
android:icon="@drawable/icon"
android:label="@string/service_name"
>
</service>
The Service java File
public class MyService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
//TODO do something useful
//write your repetition code here.
return Service.START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
//TODO for communication return IBinder implementation
return null;
}
}
Invoke your Service
Intent i= new Intent(context, MyService.class);
// potentially add data to the intent
i.putExtra("KEY1", "Value to be used by the service");
context.startService(i);
Get Latitude and Longitude
@Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude());
int lng = (int) (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
}
So, what I suggest you is to run a background service which can take the details of the latitude and longitude periodically and then send it using a JSON.