Setting permanent Google Maps destination while geolocation sets start point.

[Troy Cooper]

I am trying to build Google Directions into my app but I want to set the destination permanently and have the start point be set by the phones geolocation automatically. I tried modifying the code given in the tutorial under "Build a mobile app with Google Map and Google Directions API" and "Building a mobile app with Google Map and Geolocation" but it didn't work.

[Kateryna Grynko]

Hi Troy,

What exactly doesn't work?
Are there any errors in console?
Did you try to do the tutorial exactly?

[Troy Cooper]

Thanks for responding so quickly.:

You asked, "What exactly doesn't work?" and "Did you try to do the tutorial exactly?"
~ By following the tutorial, "Building a mobile app with Google Map and Geolocation" I was able to use the app to find my location. However, it would get rid of the marker that was on my business. I thought that if I could get it to give directions from where ever users are then the disappeared marker wouldn't really matter.
So, I tried the other tutorial "Build a mobile app with Google Map and Google Directions API" but tried to modify the code as I went along to make the geolocation was the start point in route guidance and my business as the destination. When I tested the app, the map appeared on screen without a problem but neither the geolocation or the route guidance worked at that point.

"Are there any errors in console?"
~ I don't know quite what this means. I did not get any error messages though.

[Kateryna Grynko]

In Chrome / Mozilla Firefox click F12 to open Chrome developer console / Firebug.

[Troy Cooper]

Okay

[Troy Cooper]

I opened the web console in Firefox and retested the app. It says "Geolocation is not defined."

[Troy Cooper]

Closer inspection shows that it says I have an error in my javascript on line 10. This is what I have as my javascript. How should I define "geolocation"?

var directionDisplay;
var directionsService = new google.maps.DirectionsService();

function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
}

function displayDirections(sourceAddress, destinationAddress, map) {
var request = {
origin: Geolocation,
destination: google.maps.LatLng(41.719111, -111.846469),
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
directionsDisplay.setMap(map);
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
} else {
alert("Directions query unsuccessful. Response status: " + status);
}
});
}

[Igor]

Hello.

You should define "Geolocation" variable.
code
var Geolocation=put here some value;
/code

[Troy Cooper]

Hey Igor,

How do I define "Geolocation" so that the mobile device the app is installed on inserts the proper value? I know pretty much nothing about programming... Sorry!

[Maryna Brodina]

Hello! Could you give us your public app link?