Want To Build Attendance Tracking System With Gps Latitude And Longitude

build a algorithm to find a polygon build by four sets of lat long.. and passing current lat long to find whether a set of lat long belong to that polygon or not. But the the curre

Solution 1:

You can find location using the below code:

Declare the variable:

LocationManager lm;
LocationListener ll;

Start Location listener :

    lm = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
    ll = newstartLocationListener();
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,ll);

Location listener:

classgpsLocationListenerimplementsLocationListener {

    publicvoidonLocationChanged(Location location) {
        if (location != null) {
            String latitude =  location.getLatitude();
            String longitude = location.getLongitude();                
        }
    }

    publicvoidonProviderDisabled(String provider) {
    }

    publicvoidonProviderEnabled(String provider) {
    }

    publicvoidonStatusChanged(String provider, int status, Bundle extras) {
    }

}

After finding location you can stop listener using this in onLocationChanged:

 lm.removeUpdates(ll);
 lm = null;