How to store GPS Location in SharedPreferences Android

Question

I have five fixed GPS locations in my application. When you come near them, it will be stored in the application and unlock a medal of some sort. I have used SharedPreferences for my quiz and medals, but I am a little unsure on how to store GPS in SharedPreferences as well. This is my code so far.

    package com.example.norskattraksjon;

    import java.util.ArrayList;

    import android.content.Context;
    import android.content.SharedPreferences;
    import android.location.Location;
    import android.location.LocationListener;
    import android.os.Bundle;

    import com.google.android.maps.GeoPoint;

    public class MyLocationListener implements LocationListener {
private ArrayList<GeoPoint> gplist;



public MyLocationListener(ArrayList<GeoPoint> gpList2) {
    gplist = gpList2;   
}



public void onLocationChanged(Location location) {
    System.out.println("Den kommer hits");
    for(GeoPoint gp : gplist){

        //SÂ henter vi ut latitude og longitude.
        //Det forvirrende her er at klassen "Location" bruker float-koordinater
        //mens "GeoPoint" bruker mikrokoordinater. Dermed m man konvertere mellom de.
        float latitude = (float) (gp.getLatitudeE6() / 1E6);
        float longitude = (float) (gp.getLongitudeE6() / 1E6);

        //Vi lager en "location" for hvert av punktene i gplist, utifra latitude og longitude.
        Location test = new Location("tester");
        test.setLatitude(latitude); 
        test.setLongitude(longitude);

        //location.distanceTo() er en metode som sjekker avstanden til punkter.
        //Her skal distansen vÊre under 10 000 meter.
        if(location.distanceTo(test) <= 70){
            //Om distansen er under 10 000m, s lager du en toast som gir den faktiske avstanden til punktet.
            System.out.println("Her er du");


            SharedPreferences prefs = getSharedPreferences("com.example.norskattraksjon",
                    Context.MODE_PRIVATE);

                    // Lagre en tekst... først trenger vi en editor                     
                SharedPreferences.Editor editor = prefs.edit();
                editor.putBoolean("location", true);

                   //Lagrer verdien
                    editor.commit();            

        };

    }






    };

private SharedPreferences getSharedPreferences(String string,
        int modePrivate) {
    // TODO Auto-generated method stub
    return null;
}

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
}

}

And this is my other coherent code;

    package com.example.norskattraksjon;

    import java.util.ArrayList;
    import java.util.List;

    import android.content.Context;
    import android.content.SharedPreferences;
    import android.graphics.drawable.Drawable;
    import android.location.LocationListener;
    import android.location.LocationManager;
    import android.os.Bundle;
    import android.view.Menu;

    import com.google.android.maps.GeoPoint;
    import com.google.android.maps.MapActivity;
    import com.google.android.maps.MapController;
    import com.google.android.maps.MapView;
    import com.google.android.maps.Overlay;
    import com.google.android.maps.OverlayItem;

    public class MainActivityMap extends MapActivity {

private MapController mc;
MapOverlays overlay;
ArrayList<GeoPoint> gplist;
List<Overlay> overlayList;
 LocationListener mlocListener; //Denne klassen lytter etter lokasjonen din
  LocationManager mlocManager; //Mens denne kobler deg opp mot telefonens GPS.

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    System.out.println("WEEEEEEE");
    setContentView(R.layout.mapview);


    MapView mapView = (MapView) findViewById(R.id.mapview);
    mapView.setBuiltInZoomControls(true);
    mapView.setSatellite(true);

    mc = mapView.getController();
    gplist = new ArrayList<GeoPoint>();


    overlayList = mapView.getOverlays();
    Drawable drawable = this.getResources().getDrawable(R.drawable.ic_launcher);
    overlay = new MapOverlays(drawable, this);
    double lat = 60.39403;
    double lon = 5.330579;

    GeoPoint point = new GeoPoint ((int) (lat * 1E6), (int) (lon*1E6));
    gplist.add(point);
    OverlayItem punkt1 = new OverlayItem(point, "Du har kommet til!", "Domkyrkja i Bergen!");

    double lat2 = 60.702251;
    double lon2 = 5.333685;

    GeoPoint point1 = new GeoPoint ((int) (lat2 * 1E6), (int) (lon2 *1E6));
    gplist.add(point1);
    OverlayItem punkt2 = new OverlayItem(point1, "Her ble", "Noen som drepte kongen begravd");

    double lat3 = 60.37829;
    double lon3 = 5.335665;

    GeoPoint point3 = new GeoPoint ((int) (lat3 * 1E6), (int) (lon3 *1E6));
    gplist.add(point3);
    OverlayItem punkt3 = new OverlayItem(point3, "Her ble", "Himmelfarten med tran i maga!");

    double lat4 = 60.213789;
    double lon4 = 5.369895;

    GeoPoint point4 = new GeoPoint ((int) (lat4 * 1E6), (int) (lon4 *1E6));
    gplist.add(point4);
    OverlayItem punkt4 = new OverlayItem(point4, "Her ble", "Flygelet skapt");

    double lat5 = 60.413619;
    double lon5 = 5.37579;

    GeoPoint point5 = new GeoPoint ((int) (lat5 * 1E6), (int) (lon5 *1E6));
    gplist.add(point5);
    OverlayItem punkt5 = new OverlayItem(point5, "Her ble", "Bergensbakken bakt");

    overlay.addOverlay(punkt1);
    overlay.addOverlay(punkt2);
    overlay.addOverlay(punkt3);
    overlay.addOverlay(punkt4);
    overlay.addOverlay(punkt5);
    overlayList.add(overlay);

    mc.animateTo(point);
    mc.setZoom(11);

    //Dette er metoden man bruker for  koble opp til mobilens GPS
      mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

      //Her lager vi en instans av vÂr egen LocationListener. Dette gj¯r at vi kan bestemme selv hva som skjer
      //nÂr man trykker p overlays.
      mlocListener = new MyLocationListener(gplist);

      //Her sier vi at vÂr LocationListener skal sp¯rre om GPS-signaler fra en GPS_PROVIDER.
      //0 stÂr for minimumstiden mellom oppdateringer
      //Den andre 0 stÂr for minimumsdistansen mellom oppdateringer
      //mLocListener er instansen vi lagde av vÂr egen LocationListener.
      mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
}

public GeoPoint newGeo(double x, double y){
    int a = (int) (x * 1E6);
    int b = (int) (y * 1E6);
    GeoPoint z = new GeoPoint(a,b);
    return z;
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

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

Answer 1

  SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(context);
    int latE6 = (int) (lat * 1e6);
int lonE6 = (int) (lon * 1e6);
    p.edit().putInt("Lat", latE6).commit();
    p.edit().putInt("Long", lonE6).commit();

In the above code lat and lon are your location's latitude and longitude. then you can retrieve them as int variables and get location values by dividing them by 1e6 again.

 int lat= p.getInt("Lat", "");
int lon = p.getInt("Long", "");

Answer 2

You can store the Lat and Long directly in the SharedPreference as follows:

SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(context);

p.edit().putString("Lat", YOUR_LATTITUDE).commit();
p.edit().putString("Long", YOUR_LONGITUDE).commit(); //SECURITY HAZARD: read below...

Then you can retrieve it like this:

String username = p.getString("Lat", "");
String password = p.getString("Long", "");

Hope it will help you.

Answer 3

make a method like this and just pass values as parameter.

private void SavePreferences(String key, String value){
    SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putString(key, value);
    editor.commit();
   }

you can put long in it. change it to this

private void SavePreferences(String key, long value)
editor.putInt(key,value)