Android: Get directions from Google Map

Question

I'm trying to give a direction to the user using google map from one location to another. I'm using the code bellow but I have no idea why it's not working. I can't figure out the problem everything seems right.

final double latitude = 37.894404;
final double longitude = -122.0660386;

locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
                Criteria criteria = new Criteria();
                criteria.setAccuracy(Criteria.ACCURACY_FINE);
                criteria.setAltitudeRequired(false);
                Location lastKnownLocation = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, true));

                if(lastKnownLocation != null){

                    double lat = lastKnownLocation.getLatitude();
                    double longi = lastKnownLocation.getLongitude();

                    Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://maps.google.com/maps?saddr="+lat+","+longi+"&daddr="+latitude+","+longitude));

                    startActivity(intent);

                }else{

                    Toast.makeText(contactus.this,"Coudn't get provider", Toast.LENGTH_SHORT).show();
                }           
            }

Answer 1

I actually got it working and here is the code I used,

final double latitude = 45.894404;
final double longitude = -112.0660386;

LocationManager lManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Criteria crit = new Criteria();
String towers = lManager.getBestProvider(crit, false);
Location userCurrentLocation = lManager.getLastKnownLocation(towers);

if(userCurrentLocation != null){

     double lat = userCurrentLocation.getLatitude();
     double longi = userCurrentLocation.getLongitude();

     Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://maps.google.com/maps?saddr="+lat+","+longi+"&daddr="+latitude+","+longitude));
     startActivity(intent);

}else{

    Toast.makeText(contactus.this, "Couldn't locate a provider to find your location", Toast.LENGTH_LONG).show();
}

Don't forget to add the premission to find the user location to you manifest, include it above ,

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