Android open google maps navigation intent

var  dla; // Destination latitude
var  dlo; Destination Longitude
var gmmIntentUri = Uri.parse("google.navigation:q="+ dla+","+ dlo+ "&mode=b");
// OR
var Addr = "...";
var gmmIntentUri = Uri.parse("google.navigation:q="+ Addr);

var mapIntent = Intent(Intent.ACTION_VIEW, gmmIntentUri);
mapIntent.setPackage("com.google.android.apps.maps");
startActivity(mapIntent);