I am using following example source code but I can't get long distance route in map. It only works for small distance on map.
Is there are any limitation to access map?
If some one has better idea please help.
Here is a complete source code at https://github.com/frogermcs/RoutePathExample for how to draw path between two geolocation. I use this code without any trouble at all. You should check it
Make use of this secret Google API and Android Map API to show the distance between two points.
I am using this code and it is working fine, even if I put two points in two different countries. I believe you are not implementing it in the right way, because this code is retrieving the KML provided by Google for the two points you choose, which always returns a route unless the two points are in different continents and there is no route for going by car.
I suggest you show us how did you use the code in your app.
Related
In my app I am trying to visualize best route between two points. The route is calculated using data stored in my offline database. After some google search I have seen it is easy to visualize a route using KmlDocument. But all the example I found are Just showing how to create KmlDocument from kml file and visualize it. But in my situation it is not possible, as the route is generated dynamically. So how can I visualize the route on OSMdroid?
If you just want a line on the map that represents your route, then I'm pretty sure the class you want is Polyline.
Source: https://github.com/osmdroid/osmdroid/blob/master/osmdroid-android/src/main/java/org/osmdroid/views/overlay/Polyline.java
There a few different variants which have different effects depending on what you want, such as the Milestone classes.
Source: https://github.com/osmdroid/osmdroid/tree/master/osmdroid-android/src/main/java/org/osmdroid/views/overlay/milestones
Examples for both are here: https://github.com/osmdroid/osmdroid/blob/master/OpenStreetMapViewer/src/main/java/org/osmdroid/samplefragments/drawing/CustomPaintingSurface.java#L132
I'd suggest you get the sample app from the play store, play around with what's there, then find the source to what best fits your needs and go from there.
Alongside with my friends I am about to develop an android application. The application will use maps a lot, finding routes, placing markers, drawing predefined routes, stuff like that.
There is this Google Maps APIv2. So I tried it, write some code and looks good. I am able to place markers and draw polylines, however my application will have some predefined routes. One route is set of LatLng points. So I just add these points to PolylineOptions and add it to map. Great, it works.
But these predefined routes will be created in web-based application also using Google Maps APIv2 or similar api/library. Some streets are not straight they are curved so you need to create a lot of LatLng points to get it look nice which is very important. I can do this but I want to put only two LatLng points - at the beginning of the street and at the end.
Here is the image:
On the left, route has only two LatLng points (red dots) and that is desired shape of line. On the right same route with 2 LatLng points gives me route coloured in light blue, and this is what actually happens if I just add polyline to GoogleMap object. In order to create same effect as in left image, I need to create many LatLng (red dots) points which is not appropriate for those who will create these routes. So this leads us to routing problem which can be solved by using Google Directions API. Which solves the problem of drawing routes with less markers. Basically what I understood, this API for directions actually creates a lot of these LatLng points that I draw using for-each loop as seen on right part of picture above. And I need to contact Google Web Service for this so I need to have Internet connection - and this is the problem.
Sometimes internet will not be available hence I need some alternative solution. I've heard of Open Street Maps, but I am not sure how to use it and does it needs internet connection for creating these routes.
Is there any free library that offers offline routing and showing maps offline? Basically all map interactions must be done without use of internet.
But it is understandable if internet connection is needed only for the first run of application as it is needed for Google Maps APIv2, well application crashes until I turn on internet, after which any next run I do not need internet..
A web based application will be made for creating these routes and routes will be created by users for whom we develop this application. And as users can be very annoying they will demand some user-friendly and easy interface for creating routes. Telling them that they need to create 100 to 500 points for each route, and if there is 60-70 routes they will gladly say NO to our application.
Any advice? If it is possible, I can write my own routing algorithm for Google Maps to work offline, I am very skilful at "Algorithms and Data Structures" - any guides/tutorials for this? But I guess this map is just set of tiles, and does not have necessary information for finding route.... So please correct If I am mistaken for anything.
You can use the Scout SDK (provides a free usage quota) as it offers full offline maps, routing & navigation.
Have a look into the open source projects GraphHopper, Mapsforge and OpenScience-VTM which can do routing and/or maps offline. And all use OpenStreetMap data. Other projects exists of course, have a look here and here.
Also have a look into the GraphHopper map matching component which could be interesting for your specific use case and can work offline too.
(Note I'm the author of GraphHopper)
If it is possible, I can write my own routing algorithm for Google Maps to work offline
No you can't, the data is not open nor you can buy the data to my knowledge.
Another option is OsmAnd. The OSM wiki also has some information about OsmAnd and even more information about OSM on Android in general as well as pages about rendering and routing.
I am a student working on an android application related to navigation trying to learn android programming. The application needs to search the geo-locations (latitude,longitude) among the ones available and find out which ones fall along the route the user is travelling.
For example, if the user is travelling from 37.422,-122.084058 to 37.422,-122.084058, then I should be able to search the points that fall along this route from the set of points that I have. How do I do that?
I am getting the route direction of the user from the google api
https://maps.googleapis.com/maps/api/directions/json?origin=Googleplex&destination=infinityloop=&key=your_api_key
I get the route in the form of legs and I have a set of geo-locations. I would like to find which geo-locations fall along the route of the user. Is there any way I can find it or any API that I can use ?
Any help is greatly appreciated. Thanks in advance :)
There's already a lib for this: use isLocationOnPath with the polyline you are getting from directions api response.
Build a LatLngBound using the two points and pass in the geolocation point you want to check into LatLngBounds.contain().
do you know how can we create our map and show the ways from a certain locations to destinations ? Without using google map , just using a picture of a map , is there any way to draw routes on it?I am not asking projects or codes , just need some suggestions related to drawings and considering the obstacles in the way ?Thank you
You should have your way points in somewhere(maybe in db or in xml file etc) and also for getting map base you should have a map provider like yahoo, bing, google or openstreetmap(which is free to use - no api key needed considering others)
after having these two sources you can use Geoserver(which is opensource map data manipulater and provider) to put these sources together and get them as map base image.
considering your "just using a picture of a map" is an owerwellming issue. Because you will have to do some calculation to find where to put your points programatically. So Geoserver does that automatically.
also I suggest you to hava a look at osmdroid and osmbonuspack they may help.
I want to draw route between 2 points in Google map with a pin mark at ends points. in this, user can choose any driving route like by car, by cycle, by walk. I have to show routing information like "2 miles ahead , left from next street" and also estimated time.so regarding this , I found a lot of tutorial on the internet. the best I found is:
http://code.google.com/p/j2memaprouteprovider/source/browse/#svn/trunk/J2MEMapRouteAndroidEx
which is very complex and slow.
next I found this one:
http://www.anddev.org/google_driving_directions_-_mapview_overlayed-t826.html
this one is very similar to what I want, except some feature. but it is outdated.
I also found that I have to use KML for this. but i don't want to use it because of complexity so is it necessary to use KML? is there any better way to do this? can i have full source code as I got confused by seeing chunk of code. thanks a lot in advance,.
rock,
The simplest solution for this is to open "Google Map Application" that is already installed in android device. Just pass the source and target location's latitude and longitude as a parameter and call the google map application as follows:
Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("http://maps.google.com/maps?saddr="+latitude_source+","+longitude_source+"&daddr="+latitude_dest+","+longitude_dest));
startActivity(i);
Using this approach, you can also choose any driving route like by car, by cycle, by walk etc and other functionalities that is provided by application.
Google Directions API contains everything you need. I found it easier to learn how the service works before looking at any complete source code.
Basically you will have to execute a UrlConnection and read the input stream. If you paste a basic request into a browser, you can see how your input stream would look like. Ex:
http://maps.googleapis.com/maps/api/directions/xml?origin=Chicago,IL&destination=Los+Angeles,CA&waypoints=Joplin,MO|Oklahoma+City,OK&sensor=false
The result contains everything you would need but you will have to parse the result for information like step by step directions. Also the node called "overview_polyline" is what you would use to draw a complete route on the MapView. You could use the formula here to decode that polyline into a list of coordinates.