mock location in android

Question

I am using the following to mock my location in Android.

public class GPSwork extends Activity implements LocationListener{
LocationManager locationManager;
String mocLocationProvider;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    mocLocationProvider = LocationManager.GPS_PROVIDER; 
    setLocation(28.574853,78.063201);
}

public void setLocation(double latitude, double longitude) {   
    locationManager.addTestProvider(mocLocationProvider, false, true, false, false, false, false, false, 0, 5);
    locationManager.setTestProviderEnabled(mocLocationProvider, true);
    locationManager.requestLocationUpdates(mocLocationProvider, 0, 0, this);
    Location loc = new Location(mocLocationProvider);
    loc.setTime(System.currentTimeMillis());
    loc.setLatitude(latitude);
    loc.setLongitude(longitude);
    locationManager.setTestProviderLocation(mocLocationProvider, loc);   
}

public void onLocationChanged(Location location) {
    // TODO Auto-generated method stub      
}

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      
}   
}

But it's not working. I want to see it in real device and the bubble blinking in that location, but I didnt get anything. Please correct my code, and help me out. I used the permissions.

I want build an application similatiom to location spoofer.Actually when we open google maps it will show our current location with blue blinking at our location..similarly if i changed the coordinates i.e, latitude and latitude it has to show that am at that location with blue blinking,

![alt text][1] this is the screen short..

My XML fine is

<?xml version="1.0" encoding="utf-8"?>

<com.google.android.maps.MapView 
    android:id="@+id/mapView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:apiKey="0Sy8vgJlQkFxcisUAkrxu3xN33dqFgBetCg4jxg"
    />

Answer 1

Here is how to handle gps in android. It is a bad solution to make your main activity listen to location updates. Use and modify the following class:

public MyGPS implements LocationListener{

    public LocationManager lm = null;
    private MainActivity SystemService = null;
    //lat, lng
    private double mLongitude = 0;
    private double mLatitude = 0;

    public MyGPS(MainActivity sservice){
        this.SystemService = sservice;
        this.startLocationService();
    }

    public void startLocationService(){
        this.lm = (LocationManager) this.SystemService.getSystemService(Context.LOCATION_SERVICE);
        this.lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 3000, 5, this);
    }

    public void onLocationChanged(Location location) {
        location = this.lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        try {
            this.mLongitude = location.getLongitude();
            this.mLatitude = location.getLatitude();
        } catch (NullPointerException e) {
            Log.i("Null pointer exception " + mLongitude + "," + mLatitude, null);
        }
    }
}

In your onCreate method make an instance of this class and the locationlistener will start to listen for gps updates. But you can not access lng and lat since you do not know from your activity wheather they are set or null. So you need a handler that sends a message to your main activity:

Modify in the following method:

public void onLocationChanged(Location location) {
        location = this.lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        try {
            this.mLongitude = location.getLongitude();
            this.mLatitude = location.getLatitude();
            Message msg = Message.obtain();
            msg.what = UPDATE_LOCATION;
            this.SystemService.myViewUpdateHandler.sendMessage(msg);
        } catch (NullPointerException e) {
            Log.i("Null pointer exception " + mLongitude + "," + mLatitude, null);
        }
    }

In your main activity add this:

Handler myViewUpdateHandler = new Handler(){

        public void handleMessage(Message msg) {
                switch (msg.what) {
                case UPDATE_LOCATION:
                //access lat and lng   
         }));
               }

                super.handleMessage(msg);
        }
};

Answer 2

This is a basic pattern for an app that uses google maps:

public class MapsActivity extends MapActivity 
{    

    MapView mapView;
MapController mc;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        mapView = (MapView)findViewById(R.id.mapView);
        //zoom controlls
        mc = mapView.getController();
        mc.setZoom(12);
        setContentView(R.layout.main);
    }

    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }
}

In your AndroidManifest.xml file add:

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

and:

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

To display your particular location add this to the onCreate method:

 String coordinates[] = {"1.352566007", "103.78921587"};
 double lat = Double.parseDouble(coordinates[0]);
 double lng = Double.parseDouble(coordinates[1]);

 p = new GeoPoint(
       (int) (lat * 1E6), 
       (int) (lng * 1E6));

 mc.animateTo(p);
 mc.setZoom(17); 
 mapView.invalidate();

Finally you need to set your marker using a map overlay. Add the following class to your MapsActivity class:

class MapOverlay extends com.google.android.maps.Overlay
    {
        @Override
        public boolean draw(Canvas canvas, MapView mapView, 
        boolean shadow, long when) 
        {
            super.draw(canvas, mapView, shadow);                   

            //---translate the GeoPoint to screen pixels---
            Point screenPts = new Point();
            mapView.getProjection().toPixels(p, screenPts);

            //---add the marker---
            Bitmap bmp = BitmapFactory.decodeResource(
                getResources(), R.drawable.my_bubble);            
            canvas.drawBitmap(bmp, screenPts.x, screenPts.y-50, null);         
            return true;
        }
    } 

In this draw method you can to some marker animation if you want to. Now you have to add the overlay to your map:

//---Add a location marker---
 MapOverlay mapOverlay = new MapOverlay();
 List<Overlay> listOfOverlays = mapView.getOverlays();
 listOfOverlays.clear();
 listOfOverlays.add(mapOverlay);        

 mapView.invalidate();

This is a quick overview. You will need a google api key to work with google maps api. A detailed tutorial on google maps api can be found here, Using Google Maps in Android

Answer 3

I think you have to extend the MyLocationOverlay class and Override the onDraw and change the location to your desired location and then call the superclass.onDraw method.