Always empty ResponsePath on Android offline routing

Open Source Routing Engine Mobile
1

I tried to download osm map data and created routing data as in this document: https://github.com/graphhopper/graphhopper/blob/master/docs/android/index.md. Then I can show the map perfectly (you guys have done a really amazing work). However, the problem is that I could not get routing with the generated routing data. This is my country map -gh folder:
Screen Shot 2020-05-14 at 10.52.33 PM

Here’s the code I used for calculating path:

GHRequest req = new GHRequest(fromLat, fromLon, toLat, toLon)
                    .setLocale(Locale.US)
                    .setAlgorithm(Algorithms.DIJKSTRA_BI);
            req.getHints().put(Routing.INSTRUCTIONS, "false");
            GHResponse resp = hopper.route(req);
            time = sw.stop().getSeconds();
            if (resp.getAll().isEmpty()) {
                log("resp.getAll().isEmpty(): " + resp.getDebugInfo());
                return null;
            }

Here’s the logcat I got:

com.graphhopper.android I/GH: loading map
com.graphhopper.android I/GH: loading graph (1.0) ... 
com.graphhopper.android I/GH: found graph car|MMAP_STORE|2D|no_turn_cost|5,15,4,3,5,     nodes:1257789
com.graphhopper.android I/GH: Finished loading graph. Long press to define where to start and end the route.
com.graphhopper.android I/GH: calculating path ...
com.graphhopper.android I/GH: from:21.023161,105.831423 to:21.043471,105.866356
com.graphhopper.android I/GH: resp.getAll().isEmpty():

Perhaps it’s related to the 1.0-snapshot version?

2

This should work for 0.13.

Update: for 1.0 there is a problem and have it fixed in master: https://github.com/graphhopper/graphhopper/commit/d634c41ac9a1a0fe07b071dc226774201c15de7a

1 Like
3

hey, you’re right. It works now with 0.13. Thanks for the answer. Is it possible to search or do geocoding with offline data?

4

The GraphHopper routing engine only does the routing.