try example in navigation activity

Author: vadzim-vys

examples/src/main/java/com/mapbox/navigation/examples/core/MapboxNavigationActivity.kt

@@ -10,6 +10,7 @@ import android.view.View.VISIBLE
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.lifecycleScope
 import com.mapbox.api.directions.v5.models.RouteOptions
 import com.mapbox.bindgen.Expected
 import com.mapbox.geojson.Point
@@ -52,6 +53,7 @@ import com.mapbox.navigation.ui.maps.location.NavigationLocationProvider
 import com.mapbox.navigation.ui.maps.route.arrow.api.MapboxRouteArrowApi
 import com.mapbox.navigation.ui.maps.route.arrow.api.MapboxRouteArrowView
 import com.mapbox.navigation.ui.maps.route.arrow.model.RouteArrowOptions
+import com.mapbox.navigation.ui.maps.route.line.MapboxRouteLineApiExtensions.setNavigationRoutes
 import com.mapbox.navigation.ui.maps.route.line.MapboxRouteLineApiExtensions.setRoutes
 import com.mapbox.navigation.ui.maps.route.line.api.MapboxRouteLineApi
 import com.mapbox.navigation.ui.maps.route.line.api.MapboxRouteLineView
@@ -231,15 +233,19 @@ class MapboxNavigationActivity : AppCompatActivity() {
         }
 
     private val routesObserver = RoutesObserver { result ->
-        if (result.routes.isNotEmpty()) {
+        if (result.navigationRoutes.isNotEmpty()) {
             // generate route geometries asynchronously and render them
-            CoroutineScope(Dispatchers.Main).launch {
-                val result = routeLineAPI.setRoutes(
-                    listOf(RouteLine(result.routes.first(), null))
-                )
-                val style = mapboxMap.getStyle()
-                if (style != null) {
-                    routeLineView.renderRouteDrawData(style, result)
+            lifecycleScope.launch {
+                routeLineAPI.setNavigationRoutes(
+                    newRoutes = result.navigationRoutes,
+                    alternativeRoutesMetadata = mapboxNavigation.getAlternativeMetadataFor(
+                        result.navigationRoutes
+                    )
+                ).apply {
+                    routeLineView.renderRouteDrawData(
+                        binding.mapView.getMapboxMap().getStyle()!!,
+                        this
+                    )
                 }
             }
 
@@ -472,6 +478,7 @@ class MapboxNavigationActivity : AppCompatActivity() {
             RouteOptions.builder()
                 .applyDefaultNavigationOptions()
                 .applyLanguageAndVoiceUnitOptions(this)
+                .alternatives(true)
                 .coordinatesList(listOf(origin) + waypoints)
                 .build(),
             object : NavigationRouterCallback {