Android Question Draw route keeping the road's/street's shape

[adrianstanescu85]

Hello

I wanted to ask if anyone knows a way to draw the route on the OSM map, knowing the waypoints, so that the route respects the shape of the road.

I'm asking this since knowing the waypoints from point A to point B provide coordinates for switching from one street to the other, but a certain road/street that runs between any two waypoints has quite often an unsteady non-linear path.

Do you know a way this can be done?

Thank you!
Adrian

 

[adrianstanescu85]

To picture this, here is a screenshot of plotting a route with PathOverlay.

As you can see, the route doesn't stick to the actual road (i.e. Calea Sighisoarei for instance), but is a general straight line.

Any solutions on how to make this get on the actual road?

Thank you!
Adrian

 

[achtrade]

I need this too. Why is not this possible in B4A yet ?

When will we have something like this app ?

 

[DonManfred]

It is NOT a problem with B4A. It is a missing library to do such things. Or better said; i dont know any api which exposes this functionality for free. I even dont know a paid one.

 

[eurojam]

I have a similar project at the moment. I pass the the waypoints as pairs of starting/endpoints to the mapquest routing service (http://developer.mapquest.com/de/web/products/open/directions-service) and merge the resulting routesegments to a polyline which I plot on the map. this works, but you need to have internet connection and you are limited to 4000 requests/day.

stefan

 

[Peter Simpson]

I did it by using WebView, WebViewExtra, GPS and 2 lists for Latitude and longitude. Everytime the GPS location changed I stored the Lat and Lon locations in the lists, Basically what you want is this https://www.b4x.com/android/forum/threads/google-maps.20538/#post-118361.

 

[achtrade]

I did it by using WebView, WebViewExtra, GPS and 2 lists for Latitude and longitude. Everytime the GPS location changed I stored the Lat and Lon locations in the lists, Basically what you want is this https://www.b4x.com/android/forum/threads/google-maps.20538/#post-118361.

In my case, what I need is different, knowing the point A and B, what I need is a driving route, even before to start driving, like the navigation function of Google Map, that's that pic that I posted.

Any idea ?, I'm willing to pay for such lib

 

[Peter Simpson]

Hmm Okay @achtrade,
Why don't you just do the following using a WebView then?

You will be surprised just how much you can do with a direct call to Googles URL.

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")

    Dim WebViewAB As WebView
        WebViewAB.Initialize(Null)
   
    Activity.AddView(WebViewAB, 0dip, 0dip, 100%x, 100%y)

    Dim FromA, ToB As String
        FromA = "Birmingham"
        ToB = "London"
   
    WebViewAB.LoadUrl("http://maps.google.com?q=" & FromA & " to " & ToB)
    ToastMessageShow("Loading directions, please wait", True)
End Sub

 

[achtrade]

That looks good, just 2 questions:
1. How to do it using lat y lon ?
2. How to include it in the B4A GoogleMap lib ?

https://www.b4x.com/android/forum/threads/googlemaps-tutorial.47019/#content

 

[Peter Simpson]

knowing the point A and B, what I need is a driving route, even before to start driving, like the navigation function of Google Map, that's that pic that I posted.

You've just been given that solution

1. How to do it using lat y lon ?
2. How to include it in the B4A GoogleMap lib ?

1. Use the GPS library to get your GPS starting position, use that starting position as FromA.
2. I do not use GoogleMap lib, I use the solution above for navigation or I use WebView and WebViewExtra for live tracking for my tracking app...

 

[achtrade]

where can I see your app ? what's the name ?

if my point A is 39.084511,-77.152926 and my point B is 38.991177,-77.026239

this didn't work:

WebViewAB.LoadUrl("http://maps.google.com?q=39.084511,-77.152926 to 38.991177,-77.026239")

 

[warwound]

I have a solution for use with OSMDroid, the lib and example projects can be found on my server:
http://b4a.martinpearman.co.uk/osmdroid/OSMBonusPackDirections(4.1).zip

This lib uses OSMDroid GeoPoints when dealing with coordinates.
A GeoPoint could be converted to a GoogleMaps LatLng so in theory you could use the lib with GoogleMaps too.

 

[Mark Read]

Using Peter Simpsons example and lat/lon data, this works

https://www.google.com/maps/dir/52....13257/51.488932462624355,+-0.1339280605316162

Note the + before the - sign!