abrensch
No route found
hi all.
i'm trying to develop an android satnav app for my car, android 7.0, api 24, by using mapsforge for maps and BRouter for routing.
when i run the app and try to calculate route ~30km long, by
engine.doRun(0) // 0 for no maxRunningTime
if (engine.getErrorMessage() != null) {
Log.e(TAG, "BRouter internal routing error: ${engine.getErrorMessage()}")
lastBRouterError = engine.getErrorMessage()
}
// Retrieve the result (OsmTrack)
routeData = engine.getFoundTrack()
Log.d(TAG, "after routeData: ${routeData}")
if (routeData == null || routeData.nodes == null || routeData.nodes.isEmpty()) { // OsmTrack has 'nodes' not 'points'
lastBRouterError = "BRouter: No route found or route data is empty."
Log.w(TAG, lastBRouterError!!)
} else {
routePath = routeData
// OsmTrack.nodes contains OsmPathElement, convert them to GeoPoint
routePath.nodes.forEach { pathElement ->
// OsmPathElement has getILon(), getILat() in microdegrees
osmdroidRoutePoints.add(GeoPoint(pathElement.getILat() / 1E7, pathElement.getILon() / 1E7))
}
my app gives msg: BRouter: No route found or route data is empty.
does anyone have an idea on what the problem could be? thank you
ok, let's say the route is: route on brouter.de/brouter-web/#map
do you know where is it possible to find actual brouter-android.jar to work with brouter in android studio fully offline?
here is my full calculateAndDisplayRoute function:
fun calculateAndDisplayRoute(startLat: Double, startLon: Double, endLat: Double, endLon: Double, profileName: String) {
if (!isBRouterInitialized) { // Check if data paths are valid
Log.e(TAG, "BRouter data paths not verified or invalid.")
bRouterStatusUpdater("Route Error: Nav Data not Ready. Please re-check BRouter data setup.")
return
}
val df = DecimalFormat("#.##")
Log.d(TAG, "Calculating route from ($startLat, $startLon) to ($endLat, $endLon) using profile '$profileName'")
clearRouteFromMap() // Clear old route if any
bRouterStatusUpdater("Calculating route...")
Thread { // Route calculation is heavy, run on background thread
var routeFound = false
osmdroidRoutePoints.clear()
System.setProperty("profileBaseDir", profilesDir.absolutePath)
var routePath: btools.router.OsmTrack? = null
var routeData: btools.router.OsmTrack? = null
try {
// *** CRITICAL FIX: Corrected OsmNodeNamed and OsmNode instantiation ***
// OsmNode constructor takes ilon, ilat directly.
// OsmNodeNamed constructor takes an OsmNode.
// Coordinates (lon/lat) need to be converted to microdegrees (int) for OsmNode.
val startOsmNodeRaw = OsmNode( (startLon * 1E7).toInt(), (startLat * 1E7).toInt() )
val endOsmNodeRaw = OsmNode( (endLon * 1E7).toInt(), (endLat * 1E7).toInt() )
val startOsmNodeNamed = OsmNodeNamed(startOsmNodeRaw).apply { name = "start" }
val endOsmNodeNamed = OsmNodeNamed(endOsmNodeRaw).apply { name = "end" }
// RoutingEngine takes a list of OsmNodeNamed waypoints (start and end)
val waypoints = ArrayList<OsmNodeNamed>().apply {
add(startOsmNodeNamed)
add(endOsmNodeNamed)
}
Log.d(TAG, "before RoutingContext() waypoints: ${waypoints}")
// Prepare RoutingContext
val routingContext = RoutingContext().apply {
// localFunction should be the base name of the profile file (e.g., "car-fast" for "car-fast.brf")
localFunction = profileName
// DO NOT set carMode = true or turnInstructionMode = 0 here directly.
// These values are set *by the loaded profile script* (e.g., car-fast.brf).
// If you set them here, they might be overridden or conflict with the profile.
// The profile itself dictates these.
// For example, your car-fast.brf should have a line like 'assign carMode = 1'
// and 'assign turnInstructionMode = 0' if you want no instructions.
}
Log.d(TAG, "before RoutingEngine() profileName: ${profileName}")
// Instantiate RoutingEngine per route calculation
// RoutingEngine constructor: (outfileBase, logfileBase, segmentDir, waypoints, rc, engineMode)
val engine = RoutingEngine(
null, // outfileBase (String)
null, // logfileBase (String)
segmentsDir, // segmentDir (File)
waypoints, // waypoints (List<OsmNodeNamed>)
routingContext, // rc (RoutingContext)
RoutingEngine.BROUTER_ENGINEMODE_ROUTING // engineMode (int) - 0 for routing
)
Log.d(TAG, "after RoutingEngine() waypoints: ${waypoints}")
// Perform the routing
engine.doRouting(0) // 0 for no maxRunningTime
// Retrieve the result (OsmTrack)
routeData = engine.getFoundTrack()
Log.d(TAG, "after routeData: ${routeData}")
if (routeData == null || routeData.nodes == null || routeData.nodes.isEmpty()) { // OsmTrack has 'nodes' not 'points'
lastBRouterError = "BRouter: No route found or route data is empty."
Log.w(TAG, lastBRouterError!!)
} else {
routePath = routeData
// OsmTrack.nodes contains OsmPathElement, convert them to GeoPoint
routePath.nodes.forEach { pathElement ->
// OsmPathElement has getILon(), getILat() in microdegrees
osmdroidRoutePoints.add(GeoPoint(pathElement.getILat() / 1E7, pathElement.getILon() / 1E7))
}
if (osmdroidRoutePoints.isEmpty()) {
lastBRouterError = "BRouter: Route found but converted point list is empty."
Log.w(TAG, lastBRouterError!!)
} else {
routeFound = true
currentRouteOverlay = Polyline().apply {
setPoints(osmdroidRoutePoints)
getOutlinePaint().apply {
color = ContextCompat.getColor(context, routeColorResId)
strokeWidth = 12.0f
}
}
}
}
} catch (e: Exception) {
lastBRouterError = "Exception during BRouter route calculation: ${e.message}"
Log.e(TAG, "BRouter route calculation error", e)
}
// Update UI back in MainActivity via callbacks
if (routeFound && routePath != null) {
val distanceMeters = routePath.distance.toDouble()
val timeSeconds = routePath.getTotalSeconds().toLong()
distanceTimeUpdater(df.format(distanceMeters / 1000.0) + " km", formatDuration(timeSeconds))
bRouterStatusUpdater("Route calculated.")
routeCalculatedCallback(currentRouteOverlay)
} else {
distanceTimeUpdater("Dist:", "Time:")
bRouterStatusUpdater(lastBRouterError ?: "BRouter route calculation failed (unknown).")
routeCalculatedCallback(null)
}
}.start()
}
and when i try to use it logcat gives:
BRouter not initialized. Initiating loading now. Verifying profile: /storage/emulated/0/myNavi/brouter/profiles2 BRouter data directories found and verified. /storage/emulated/0/myNavi/brouter Calculating route from (50.899731, 3.176693) to (50.800184, 3.365965) using profile 'car-fast' Route cleared from map. before RoutingContext() waypoints: [31766930,508997310,start,0.0, 33659650,508001840,end,0.0] before RoutingEngine() profileName: car-fast after RoutingEngine() waypoints: [31766930,508997310,start,0.0, 33659650,508001840,end,0.0] after routeData: btools.router.OsmTrack@8878bd BRouter: No route found or route data is empty.
do you know where is it possible to find actual brouter-android.jar to work with brouter in android studio fully offline?
@victorlysak Check the Releases.
brouter-1.7.7.zip does not have brouter-android.jar, it has brouter-1.7.7-all.jar and this is what i'm trying to use. is there any .jar file that can be used only for android studio to develop own app with brouter routing?
On Android I only know the "IPC" interface: -the Brouter-app is intalled -Your app "calls" the brouter-app using IPC (inter process communication)
(if interested I could send you an example such as the Osmand app)
