User movement between two points in Google Maps

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User movement between two points in Google Maps

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I have a little doubt, I'm making an Android app of a subject I have and it consists of the fact that depending on the user's position, a nearby bar / restaurant is recommended to eat according to certain parameters that the user enters (radio , price and quality).

So far everything is perfect, I take the user's position (latitude and longitude) and I take the position of the bar (latitude and longitude).

What I would like to do is to draw a route on the map between the position of the user and the position of the restaurant bar, and that as the user moves, they update their position on the map until they reach their destination .

I have searched through the different Stack Overflow posts for some information and the one I find is somewhat diffuse, or I do not know how to apply it to what I want to do.

If you could help me in any way, either by showing me a post where you talk about it in which I have not looked or a web page where you see information about what I'm looking for that has not looked, I would be eternally grateful .

android google-maps

asked by anjoalDev 09.02.2017 в 19:51

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1 answer

Add array after you read the first [closed] Can I use a FOR cycle in my program?

score 1 · Answer 1

The first option:

Make a request to get the address nodes to the Google Directions API and get the overview_polyline .

Decode the string using android-maps-utils library with the PolyUtil.decode method.

Add your decoded points to the map:

List<LatLng> decodedPoints = PolyUtil.decode(polylineString);
PolylineOptions options = new PolylineOptions();
options.width(6);
options.color(Color.RED);
options.addAll(decodedPoints);

map.addPolyline(options);

The second option:

Use a library, I've used Android-GoogleDirectionLibrary from akexorcist , personally it has been very useful and easy to use, you just pass the parameters: the origin and the end, the color, the route on foot or by car, etc ..

Regarding that the marker changes every time the location changes, if you are using the FusedLocationProviderAPI you can change the markers in the onLocationChanged() method.