prototyping

Author: vadzim-vys

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

@@ -89,6 +89,8 @@ class MapboxNavigationActivity : AppCompatActivity() {
     // location puck integration
     private val navigationLocationProvider = NavigationLocationProvider()
 
+    private val waypoints = mutableListOf<Point>()
+
     // camera
     private lateinit var navigationCamera: NavigationCamera
     private lateinit var viewportDataSource: MapboxNavigationViewportDataSource
@@ -398,7 +400,7 @@ class MapboxNavigationActivity : AppCompatActivity() {
             routeLineView.initializeLayers(style)
             // add long click listener that search for a route to the clicked destination
             binding.mapView.gestures.addOnMapLongClickListener { point ->
-                findRoute(point)
+                addWaypoint(point)
                 true
             }
         }
@@ -459,24 +461,25 @@ class MapboxNavigationActivity : AppCompatActivity() {
         voiceInstructionsPlayer.shutdown()
     }
 
-    private fun findRoute(destination: Point) {
+    private fun addWaypoint(destination: Point) {
         val origin = navigationLocationProvider.lastLocation?.let {
             Point.fromLngLat(it.longitude, it.latitude)
         } ?: return
 
+        waypoints.add(destination)
+
         mapboxNavigation.requestRoutes(
             RouteOptions.builder()
                 .applyDefaultNavigationOptions()
                 .applyLanguageAndVoiceUnitOptions(this)
-                .coordinatesList(listOf(origin, destination))
-                .layersList(listOf(mapboxNavigation.getZLevel(), null))
+                .coordinatesList(listOf(origin) + waypoints)
                 .build(),
             object : NavigationRouterCallback {
                 override fun onRoutesReady(
                     routes: List<NavigationRoute>,
                     routerOrigin: RouterOrigin
                 ) {
-                    setRouteAndStartNavigation(routes)
+                    setRoutePreview(routes)
                 }
 
                 override fun onFailure(
@@ -493,9 +496,25 @@ class MapboxNavigationActivity : AppCompatActivity() {
         )
     }
 
-    private fun setRouteAndStartNavigation(route: List<NavigationRoute>) {
+
+
+    private fun setRoutePreview(route: List<NavigationRoute>) {
+        // set route
+        mapboxNavigation.previewNavigationRoutes(route)
+        binding.navigate.visibility = VISIBLE
+        binding.navigate.setOnClickListener {
+            setRoute()
+            binding.navigate.visibility = INVISIBLE
+        }
+
+        // move the camera to overview when new route is available
+        navigationCamera.requestNavigationCameraToOverview()
+    }
+
+    private fun setRoute() {
         // set route
-        mapboxNavigation.setNavigationRoutes(route)
+        mapboxNavigation.setPreviewedRoute()
+        waypoints.clear()
 
         // show UI elements
         binding.soundButton.visibility = VISIBLE
@@ -505,7 +524,7 @@ class MapboxNavigationActivity : AppCompatActivity() {
         binding.soundButton.unmuteAndExtend(2000L)
 
         // move the camera to overview when new route is available
-        navigationCamera.requestNavigationCameraToOverview()
+        navigationCamera.requestNavigationCameraToFollowing()
     }
 
     private fun clearRouteAndStopNavigation() {

examples/src/main/res/layout/layout_activity_navigation.xml

@@ -13,6 +13,16 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <Button
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/navigate"
+        android:visibility="invisible"
+        android:text="Navigate"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"/>
+
     <androidx.cardview.widget.CardView
         android:id="@+id/tripProgressCard"
         android:layout_width="0dp"

libnavigation-core/src/main/java/com/mapbox/navigation/core/MapboxNavigation.kt

@@ -828,6 +828,25 @@ class MapboxNavigation @VisibleForTesting internal constructor(
         )
     }
 
+    fun previewNavigationRoutes(
+        routes: List<NavigationRoute>,
+        initialLegIndex: Int = 0,
+    ) {
+        //TODO: parse alternatives metadata using NN and set it route alternatives controller
+        directionsSession.setRoutes(routes, initialLegIndex, RoutesExtra.ROUTES_UPDATE_REASON_NEW)
+    }
+
+    fun setPreviewedRoute() {
+        val routes = directionsSession.routes
+        if (routes.isNotEmpty()) {
+            internalSetNavigationRoutes(
+                routes,
+                directionsSession.initialLegIndex,
+                RoutesExtra.ROUTES_UPDATE_REASON_NEW
+            )
+        }
+    }
+
     /**
      * Requests road graph data update and invokes the callback on result.
      * Use this method if the frequency of application relaunch is too low