I've a route planner web service. Mobile users are constantly reporting that downloaded gpx files cannot be opened from Android's DownloadManager with OruxMaps meanwhile works with Locus Maps.
I've did some work towards and found the problem in OruxMaps: many standard GIS file format missing from OruxMaps' AndroidManifest.xml including application/gpx+xml (this is what I use).
Please, include the following mimeType's in AndroidManifest.xml:
application/gpx
application/gpx+xml
application/kml
application/kml+xml
application/kmz
(application/xml, application/vnd.google-earth.kml+xml, application/vnd.google-earth.kmz already included.)
Maybe a good idea to include the following types too (taken from Locus): text/plain, application/x-compressed, application/x-zip-compressed, application/x-zip, application/zip - but it's only for broken web servers.
Thanks!