android: how to fix gps with mock(fake) coordinates?

Question

I'm trying to fix GPS programmatically when the GPS signal is not available. I want to do this in order to provide mock coordinates to other apps like google maps and others. I tried to use GPS_PROVIDER and NETWORK_PROVIDER but only with the latter I can get a new location valid for google maps. But this works only the first tima and if I want to re-fix more mock locations google maps doesn't see any change... why?? I have to do a service for what I want to do?

public void setLocation(double latitude, double longitude) {   


     //mocLocationProvider = LocationManager.GPS_PROVIDER;
     mocLocationProvider = LocationManager.NETWORK_PROVIDER;
     lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
     lm.clearTestProviderEnabled(mocLocationProvider);
     lm.requestLocationUpdates(mocLocationProvider,0,0,new llistener());
     lm.addTestProvider(mocLocationProvider, false, false, false, false, false, false, false, 0, 10);
     lm.setTestProviderEnabled(mocLocationProvider, true);
     Location loc = new Location(mocLocationProvider);
     loc.setTime(System.currentTimeMillis());
     loc.setLatitude(latitude);
     loc.setLongitude(longitude);
     loc.setAccuracy(10);
     lm.setTestProviderStatus(mocLocationProvider, LocationProvider.AVAILABLE,null, System.currentTimeMillis());
     lm.setTestProviderLocation(mocLocationProvider, loc);   

}

and location listener

public class llistener implements LocationListener {
@Override
public void onLocationChanged(Location loc) {
    // TODO Auto-generated method stub
}

@Override
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub
}

@Override
public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub
}

@Override
public void onStatusChanged(String provider, int status, 
        Bundle extras) {
}

}

thanks

Answer 1

What mock locations need :

<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION">

Also in the android phone settings make sure you have the "Allow mock locations" checkbox ticked

locationManager.addTestProvider(mocLocationProvider, false, false,
                    false, false, true, true, true, 0, 5);
locationManager.setTestProviderEnabled(mocLocationProvider, true);

. Now whenever you want to send a location, call this code:

Location mockLocation = new Location(mocLocationProvider); // a string
mockLocation.setLatitude(location.getLatitude());  // double 
mockLocation.setLongitude(location.getLongitude()); 
mockLocation.setAltitude(location.getAltitude()); 
mockLocation.setTime(System.currentTimeMillis()); 
locationManager.setTestProviderLocation( mocLocationProvider, mockLocation); 

.

But this works only the first time

Because you called it one time.

I have to do a service for what I want to do

You can do this, even an AsyncTask will do

do this or not: lm.requestLocationUpdates()

Yes you have to with the mocLocationProvider

I already call more times the method setLocation(latitude,longitude) but it works(location updateding) only first time for google maps

There is no method called setLocation(), use setTestLocation()

What actually I have to do in asynckTask

You can use a Thread, a TimerTask or anything you like. The idea is to inject location every second into the Framework.