Navigate route

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Use a routing service to navigate between two points.

Image of navigate route

Use case

Navigation is often used by field workers while traveling between two points to get live directions based on their location.

How to use the sample

Tap 'Navigate Route' to simulate travelling and to receive directions from a preset starting point to a preset destination. Tap 'Recenter' to focus on the simulated location, or press 'Navigate Route' again to restart navigation.

How it works

  1. Create a RouteTask using a URL to an online route service.
  2. Generate default RouteParameters using routeTask.createDefaultParametersAsync().
  3. Set returnStops and returnDirections on the parameters to true.
  4. Add Stops to the parameters stops collection for each destination.
  5. Solve the route using routeTask.solveAsync(routeParameters) to get a RouteResult.
  6. Create a RouteTracker using the route result, and the index of the desired route to take.
  7. Create a RouteTrackerLocationDataSource with the route tracker and simulated location data source to snap the location display to the route.
  8. Add a listener to capture TrackingStatusChangedEvents, and then get the TrackingStatus and use it to display updated route information. Tracking status includes a variety of information on the route progress, such as the remaining distance, remaining geometry or traversed geometry (represented by a Polyline), or the remaining time (Double), amongst others.
  9. Add a NewVoiceGuidanceListener to get the VoiceGuidance whenever new instructions are available. From the voice guidance, get the String representing the directions and use a text-to-speech engine to output the maneuver directions.
  10. You can also query the tracking status for the current DirectionManeuver index, retrieve that maneuver from the Route and get it's direction text to display in the GUI.
  11. To establish whether the destination has been reached, get the DestinationStatus from the tracking status. If the destination status is REACHED, and the remainingDestinationCount is 1, we have arrived at the destination and can stop routing. If there are several destinations in your route, and the remaining destination count is greater than 1, switch the route tracker to the next destination.

Relevant API

  • DestinationStatus
  • Location
  • LocationDataSource
  • ReroutingStrategy
  • Route
  • RouteParameters
  • RouteTask
  • RouteTracker
  • Stop
  • VoiceGuidance

Offline data

None

About the data

The route taken in this sample goes from the San Diego Convention Center, site of the annual Esri User Conference, to the Fleet Science Center, San Diego.

Tags

directions, maneuver, navigation, route, turn-by-turn, voice

Sample Code

MainActivity.kt
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/*
 *  Copyright 2020 Esri
 *
 * Licensed under the Apache License, Version 2.0 (the "License")
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.esri.arcgisruntime.sample.navigateroute

import android.content.res.Resources
import android.graphics.Color
import android.os.Build
import android.os.Bundle
import android.speech.tts.TextToSpeech
import android.text.format.DateUtils
import android.util.Log
import android.widget.Button
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.geometry.Point
import com.esri.arcgisruntime.geometry.SpatialReferences
import com.esri.arcgisruntime.location.RouteTrackerLocationDataSource
import com.esri.arcgisruntime.location.SimulatedLocationDataSource
import com.esri.arcgisruntime.location.SimulationParameters
import com.esri.arcgisruntime.mapping.ArcGISMap
import com.esri.arcgisruntime.mapping.BasemapStyle
import com.esri.arcgisruntime.mapping.Viewpoint
import com.esri.arcgisruntime.mapping.view.Graphic
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay
import com.esri.arcgisruntime.mapping.view.LocationDisplay
import com.esri.arcgisruntime.mapping.view.MapView
import com.esri.arcgisruntime.navigation.DestinationStatus
import com.esri.arcgisruntime.navigation.RouteTracker
import com.esri.arcgisruntime.navigation.TrackingStatus
import com.esri.arcgisruntime.symbology.SimpleLineSymbol
import com.esri.arcgisruntime.tasks.networkanalysis.RouteParameters
import com.esri.arcgisruntime.tasks.networkanalysis.RouteResult
import com.esri.arcgisruntime.tasks.networkanalysis.RouteTask
import com.esri.arcgisruntime.tasks.networkanalysis.Stop
import com.esri.arcgisruntime.sample.navigateroute.databinding.ActivityMainBinding
import java.util.Calendar
import java.util.concurrent.ExecutionException

class MainActivity : AppCompatActivity() {

  private val TAG: String = this::class.java.simpleName

  private var textToSpeech: TextToSpeech? = null

  private var isTextToSpeechInitialized = false

  private val activityMainBinding by lazy {
    ActivityMainBinding.inflate(layoutInflater)
  }

  private val mapView: MapView by lazy {
    activityMainBinding.mapView
  }

  private val navigateRouteButton: Button by lazy {
    activityMainBinding.navigationControls.navigateRouteButton
  }

  private val recenterButton: Button by lazy {
    activityMainBinding.navigationControls.recenterButton
  }

  private val distanceRemainingTextView: TextView by lazy {
    activityMainBinding.navigationControls.distanceRemainingTextView
  }

  private val timeRemainingTextView: TextView by lazy {
    activityMainBinding.navigationControls.timeRemainingTextView
  }

  private val nextDirectionTextView: TextView by lazy {
    activityMainBinding.navigationControls.nextDirectionTextView
  }

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(activityMainBinding.root)

    // authentication with an API key or named user is required to access basemaps and other
    // location services
    ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY)

    // create a map and set it to the map view
    mapView.map = ArcGISMap(BasemapStyle.ARCGIS_STREETS)

    // create a graphics overlay to hold our route graphics and clear any graphics
    mapView.graphicsOverlays.add(GraphicsOverlay())

    // create text-to-speech to replay navigation voice guidance
    textToSpeech = TextToSpeech(this) { status ->
      if (status != TextToSpeech.ERROR) {
        textToSpeech?.language = Resources.getSystem()
          .configuration.locale
        isTextToSpeechInitialized = true
      }
    }

    // generate a route with directions and stops for navigation
    val routeTask = RouteTask(this, getString(R.string.routing_service_url))
    val routeParametersFuture = routeTask.createDefaultParametersAsync()
    routeParametersFuture.addDoneListener {

      // define the route parameters
      val routeParameters = routeParametersFuture.get().apply {
        try {
          setStops(routeStops)
          isReturnDirections = true
          isReturnStops = true
          isReturnRoutes = true
        } catch (e: Exception) {
          when (e) {
            is InterruptedException, is ExecutionException -> {
              val error = "Error getting the default route parameters: " + e.message
              Toast.makeText(this@MainActivity, error, Toast.LENGTH_LONG).show()
              Log.e(TAG, error)
            }
            else -> throw e
          }
        }
      }

      val routeResultFuture = routeTask.solveRouteAsync(routeParameters)
      routeResultFuture.addDoneListener {
        try {
          // get the route geometry from the route result
          val routeResult = routeResultFuture.get()
          val routeGeometry = routeResult.routes[0].routeGeometry
          // create a graphic for the route geometry
          val routeGraphic = Graphic(
            routeGeometry,
            SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLUE, 5f)
          )
          // add it to the graphics overlay
          mapView.graphicsOverlays[0].graphics.add(routeGraphic)
          // set the map view view point to show the whole route
          mapView.setViewpointAsync(Viewpoint(routeGeometry.extent))

          // set button to start navigation with the given route
          navigateRouteButton.setOnClickListener {
            startNavigation(
              routeTask,
              routeParameters,
              routeResult
            )
          }

          // start navigating
          startNavigation(routeTask, routeParameters, routeResult)
        } catch (e: Exception) {
          when (e) {
            is InterruptedException, is ExecutionException -> {
              val error = "Error creating the route result: " + e.message
              Toast.makeText(this, error, Toast.LENGTH_LONG).show()
              Log.e(TAG, error)
            }
            else -> throw e
          }
        }
      }
    }

    // wire up recenter button
    recenterButton.apply {
      isEnabled = false
      setOnClickListener {
        mapView.locationDisplay.autoPanMode = LocationDisplay.AutoPanMode.NAVIGATION
        recenterButton.isEnabled = false
      }
    }
  }

  /**
   * Start the navigation along the provided route.
   *
   * @param routeTask used to generate the route.
   * @param routeParameters to describe the route.
   * @param routeResult solved from the routeTask.
   * */
  private fun startNavigation(
    routeTask: RouteTask,
    routeParameters: RouteParameters,
    routeResult: RouteResult
  ) {

    // clear any graphics from the current graphics overlay
    mapView.graphicsOverlays[0].graphics.clear()

    // get the route's geometry from the route result
    val routeGeometry = routeResult.routes[0].routeGeometry
    // create a graphic (with a dashed line symbol) to represent the route
    val routeAheadGraphic = Graphic(
      routeGeometry,
      SimpleLineSymbol(SimpleLineSymbol.Style.DASH, Color.MAGENTA, 5f)
    )
    // create a graphic (solid) to represent the route that's been traveled (initially empty)
    val routeTraveledGraphic = Graphic(
      routeGeometry,
      SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLUE, 5f)
    )
    // add the graphics to the mapView's graphics overlays
    mapView.graphicsOverlays[0].graphics.addAll(listOf(routeAheadGraphic, routeTraveledGraphic))

    // set up a simulated location data source which simulates movement along the route
    val simulationParameters = SimulationParameters(Calendar.getInstance(), 35.0, 5.0, 5.0)
    val simulatedLocationDataSource = SimulatedLocationDataSource().apply {
      setLocations(routeGeometry, simulationParameters)
    }

    // set up a RouteTracker for navigation along the calculated route
    val routeTracker = RouteTracker(applicationContext, routeResult, 0, true).apply {
      enableReroutingAsync(
        routeTask,
        routeParameters,
        RouteTracker.ReroutingStrategy.TO_NEXT_WAYPOINT,
        true
      )
    }

    // create a route tracker location data source to snap the location display to the route
    val routeTrackerLocationDataSource =
      RouteTrackerLocationDataSource(routeTracker, simulatedLocationDataSource)
    // get the map view's location display and set it up
    val locationDisplay = mapView.locationDisplay.apply {
      // set the simulated location data source as the location data source for this app
      locationDataSource = routeTrackerLocationDataSource
      autoPanMode = LocationDisplay.AutoPanMode.NAVIGATION
      // if the user navigates the map view away from the location display, activate the recenter button
      addAutoPanModeChangedListener { recenterButton.isEnabled = true }
    }

    // listen for changes in location
    locationDisplay.addLocationChangedListener {
      // get the route's tracking status
      val trackingStatus = routeTracker.trackingStatus
      // set geometries for the route ahead and the remaining route
      routeAheadGraphic.geometry = trackingStatus.routeProgress.remainingGeometry
      routeTraveledGraphic.geometry = trackingStatus.routeProgress.traversedGeometry

      // get remaining distance information
      val remainingDistance: TrackingStatus.Distance =
        trackingStatus.destinationProgress.remainingDistance
      // covert remaining minutes to hours:minutes:seconds
      val remainingTimeString = DateUtils
        .formatElapsedTime((trackingStatus.destinationProgress.remainingTime * 60).toLong())

      // update text views
      distanceRemainingTextView.text = getString(
        R.string.distance_remaining, remainingDistance.displayText,
        remainingDistance.displayTextUnits.pluralDisplayName
      )
      timeRemainingTextView.text = getString(R.string.time_remaining, remainingTimeString)

      // listen for new voice guidance events
      routeTracker.addNewVoiceGuidanceListener { newVoiceGuidanceEvent ->
        // use Android's text to speech to speak the voice guidance
        speakVoiceGuidance(newVoiceGuidanceEvent.voiceGuidance.text)
        nextDirectionTextView.text = getString(
          R.string.next_direction,
          newVoiceGuidanceEvent.voiceGuidance.text
        )
      }

      // if a destination has been reached
      if (trackingStatus.destinationStatus == DestinationStatus.REACHED) {
        // if there are more destinations to visit. Greater than 1 because the start point is considered a "stop"
        if (routeTracker.trackingStatus.remainingDestinationCount > 1) {
          // switch to the next destination
          routeTracker.switchToNextDestinationAsync()
          Toast.makeText(
            this,
            "Navigating to the second stop, the Fleet Science Center.",
            Toast.LENGTH_LONG
          ).show()
        } else {
          // the final destination has been reached, stop the simulated location data source
          simulatedLocationDataSource.stop()
          routeTrackerLocationDataSource.stop()
          Toast.makeText(this, "Arrived at the final destination.", Toast.LENGTH_LONG).show()
        }
      }
    }
    // start the LocationDisplay, which starts the RouteTrackerLocationDataSource and SimulatedLocationDataSource
    locationDisplay.startAsync()
    Toast.makeText(
      this,
      "Navigating to the first stop, the USS San Diego Memorial.",
      Toast.LENGTH_LONG
    ).show()
  }

  /**
   * Uses Android's text to speak to say the latest voice guidance from the RouteTracker out loud.
   *
   * @param voiceGuidanceText to be converted to speech
   */
  private fun speakVoiceGuidance(voiceGuidanceText: String) {
    if (isTextToSpeechInitialized && textToSpeech?.isSpeaking == false) {
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        textToSpeech?.speak(voiceGuidanceText, TextToSpeech.QUEUE_FLUSH, null, null)
      } else {
        textToSpeech?.speak(voiceGuidanceText, TextToSpeech.QUEUE_FLUSH, null)
      }
    }
  }

  override fun onResume() {
    super.onResume()
    mapView.resume()
  }

  override fun onPause() {
    mapView.pause()
    super.onPause()
  }

  override fun onDestroy() {
    mapView.dispose()
    super.onDestroy()
  }
}

private val routeStops by lazy {
  listOf(
    // San Diego Convention Center
    Stop(Point(-117.160386, 32.706608, SpatialReferences.getWgs84())),
    // USS San Diego Memorial
    Stop(Point(-117.173034, 32.712327, SpatialReferences.getWgs84())),
    // RH Fleet Aerospace Museum
    Stop(Point(-117.147230, 32.730467, SpatialReferences.getWgs84()))
  )
}

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