Google Maps API Navigation Sample

private void initNav(){


        String dLatitud="19.6893579";
        String dLongitud="-100.5505599";

        //Uri gmmIntentUri = Uri.parse("google.navigation:q="+dLatitud+","+dLongitud+"");
        //destino=""Eréndira+A+León+20"";
        Uri gmmIntentUri = Uri.parse("google.navigation:q="+destino+"");
        Intent mapIntent = new Intent(Intent.ACTION_VIEW, gmmIntentUri);
        mapIntent.setPackage("com.google.android.apps.maps");
        Log.d("Dummy FB", gmmIntentUri.toString());
        if(mapIntent.resolveActivity(getPackageManager())!=null){
            startActivity(mapIntent);
        }else{
            Toast.makeText(this, "Instala Google Maps para continuar", Toast.LENGTH_SHORT).show();
        }
    }