Using MapBox to start Navigation UI causes unexpected crash

Question

I am attempting to implement a navigation component to my application following this MapBox guide:

https://docs.mapbox.com/help/tutorials/android-navigation-sdk/

When I attempt to call .startNavigation(...) I get an unexpected error:

2020-03-08 19:51:45.786 11394-11394/com.example.mapboxnav A/libc: Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x8 in tid 11394 (mple.mapboxnav), pid 11394 (mple.mapboxnav)

Since the application I'm creating features many buttons, I've implemented View.OnClickListener and am calling the Navigation interface when a user presses the navigation button (R.id.startNav). However, as soon as a user presses the button the application crashes.

The currentRoute is working and shown on the map upon calling getRoute, like the example. I have verified that currentRoute is definitely not null. I have also attempted to start navigation with different coordinates without any luck.

currentRoute contains a route from the user's current/last known location to a specified destination. For reference, the line is set/generated with the following method:

public void initLine(Double lng, Double lat) {
        Location lastKnownLocation = mapboxMap.getLocationComponent().getLastKnownLocation();
        Point origin = Point.fromLngLat(lastKnownLocation.getLongitude(), lastKnownLocation.getLatitude());
        Point destination = Point.fromLngLat(lng, lat);
        getRoute(origin, destination);

    }

onClick:

public void onClick(View v) {
        switch (v.getId()) {
            ...

            case R.id.startNav:

                boolean simulateRoute = true;

                NavigationLauncherOptions options = NavigationLauncherOptions.builder()
                        .directionsRoute(currentRoute)
                        .shouldSimulateRoute(simulateRoute)
                        .build();
                NavigationLauncher.startNavigation(MainActivity.this, options); // Causes Crash

        }
    }

Answer 1

I spend two and a half days over this until I discovered that the problem is that we need to set the location Engine before calling :

NavigationLauncher.startNavigation(MainActivity.this, options);

so your code should look like this and it should work:

NavigationLauncherOptions options = NavigationLauncherOptions.builder()
                            .directionsRoute(currentRoute)
                            .shouldSimulateRoute(simulateRoute)
                            .build();
    
    
// Just add these three lines
MapboxNavigation navigation = new MapboxNavigation(DriveActivity.this, getString(R.string. mapbox_access_token));
navigation.setLocationEngine(locationEngine);              mapboxMap.getLocationComponent().setLocationComponentEnabled(true);


NavigationLauncher.startNavigation(MainActivity.this, options);

Let me know how it goes

Criss