Android SDK deprecations: See the release notes for deprecation information regarding SDK v1.x.

Navigation SDK is currently available only to select customers. Contact sales to learn more.

Route to Multiple Destinations

Follow this guide to plot a route within your app to multiple destinations, also called waypoints, using the Navigation SDK for Android.

Overview

Integrate the Navigation SDK into your app, as described in the configuration guide.
Add a NavigationFragment or NavigationView to your app. This UI element adds the interactive map and turn-by-turn navigation UI to your activity.
Use the NavigationApi class to initialize the SDK.
Define a Navigator to control turn-by-turn navigation:
- Add destinations using setDestinations().
- Start navigation with startGuidance().
- Use getSimulator() to simulate the progress of the vehicle along the route, for testing, debugging, and demonstrating your app.
Build and run your app.

See the code

< > Show/Hide the Java code for the navigation activity.

package com.example.navsdkmultidestination;

import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;
import androidx.annotation.NonNull;
import com.google.android.libraries.navigation.ArrivalEvent;
import com.google.android.libraries.navigation.Camera;
import com.google.android.libraries.navigation.ListenableResultFuture;
import com.google.android.libraries.navigation.LocationEvent;
import com.google.android.libraries.navigation.NavigationApi;
import com.google.android.libraries.navigation.NavigationFragment;
import com.google.android.libraries.navigation.Navigator;
import com.google.android.libraries.navigation.RoadSnappedLocationProvider;
import com.google.android.libraries.navigation.SimulationOptions;
import com.google.android.libraries.navigation.TimeAndDistance;
import com.google.android.libraries.navigation.Waypoint;
import java.util.ArrayList;
import java.util.List;

/**
 * An activity that displays a map and a navigation UI, guiding the user
 * from their current location to multiple destinations, also known as waypoints.
 */
public class NavigationActivityMultiDestination extends AppCompatActivity {

    private static final String TAG = NavigationActivityMultiDestination.class.getSimpleName();
    private static final String DISPLAY_BOTH = "both";
    private static final String DISPLAY_TOAST = "toast";
    private static final String DISPLAY_LOG = "log";

    private Navigator mNavigator;
    private RoadSnappedLocationProvider mRoadSnappedLocationProvider;
    private NavigationFragment mNavFragment;
    private final List<Waypoint> mWaypoints = new ArrayList<>();

    private Bundle mSavedInstanceState;
    private static final String KEY_JOURNEY_IN_PROGRESS = "journey_in_progress";
    private boolean mJourneyInProgress = false;

    // Set fields for requesting location permission.
    private static final int PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1;
    private boolean mLocationPermissionGranted;

    /**
     * Sets up the navigator when the activity is created.
     * @param savedInstanceState The activity state bundle.
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Save the navigator state, used to determine whether a journey is in progress.
        mSavedInstanceState = savedInstanceState;
        if (mSavedInstanceState != null
                && mSavedInstanceState.containsKey(KEY_JOURNEY_IN_PROGRESS)) {
            mJourneyInProgress = (mSavedInstanceState.getInt(KEY_JOURNEY_IN_PROGRESS) != 0);
        }

        setContentView(R.layout.activity_main);

        // Initialize the Navigation SDK.
        initializeNavigationSdk();
    }

    /**
     * Releases navigation listeners when the activity is destroyed.
     */
    @Override
    protected void onDestroy() {
        super.onDestroy();

        if ((mJourneyInProgress) && (this.isFinishing())) {
            mNavigator.setArrivalListener(null);
            mNavigator.setRouteChangedListener(null);
            mNavigator.clearRemainingTimeOrDistanceChangedListener();
            if (mRoadSnappedLocationProvider != null) {
                mRoadSnappedLocationProvider.stopRequestingLocationUpdates();
            }
            displayMessage("OnDestroy: Released navigation listeners.", DISPLAY_LOG);
        }
    }

    /**
     * Saves the state of the app when the activity is paused.
     */
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (mJourneyInProgress) {
            outState.putInt(KEY_JOURNEY_IN_PROGRESS, 1);
        } else {
            outState.putInt(KEY_JOURNEY_IN_PROGRESS, 0);
        }
    }

    /**
     * Starts the Navigation SDK and sets the camera to follow the device's location.
     * Calls the navigateToPlaces() method when the navigator is ready.
     */
    private void initializeNavigationSdk() {
        /*
         * Request location permission, so that we can get the location of the
         * device. The result of the permission request is handled by a callback,
         * onRequestPermissionsResult.
         */
        if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
                android.Manifest.permission.ACCESS_FINE_LOCATION)
                    == PackageManager.PERMISSION_GRANTED) {
            mLocationPermissionGranted = true;
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[] { android.Manifest.permission.ACCESS_FINE_LOCATION },
                    PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
        }

        if (!mLocationPermissionGranted) {
            displayMessage("Error loading Navigation SDK: "
                    + "The user has not granted location permission.", DISPLAY_BOTH);
            return;
        }

        // Get a navigator.
        NavigationApi.getNavigator(this, new NavigationApi.NavigatorListener() {
                    /**
                     * Sets up the navigation UI when the navigator is ready for use.
                     */
                    @Override
                    public void onNavigatorReady(Navigator navigator) {
                        displayMessage("Navigator ready.", DISPLAY_BOTH);
                        mNavigator = navigator;
                        mNavFragment = (NavigationFragment) getFragmentManager()
                                .findFragmentById(R.id.navigation_fragment);

                        // Set the camera to follow the device location with 'TILTED' driving view.
                        mNavFragment.getCamera().followMyLocation(Camera.Perspective.TILTED);

                        // Navigate to the specified places.
                        navigateToPlaces();
                    }

                    /**
                     * Handles errors from the Navigation SDK.
                     * @param errorCode The error code returned by the navigator.
                     */
                    @Override
                    public void onError(@NavigationApi.ErrorCode int errorCode) {
                        switch (errorCode) {
                            case NavigationApi.ErrorCode.NOT_AUTHORIZED:
                                displayMessage("Error loading Navigation SDK: Your API key is "
                                        + "invalid or not authorized to use the Navigation SDK.",
                                        DISPLAY_BOTH);
                                break;
                            case NavigationApi.ErrorCode.TERMS_NOT_ACCEPTED:
                                displayMessage("Error loading Navigation SDK: User did not accept "
                                        + "the Navigation Terms of Use.", DISPLAY_BOTH);
                                break;
                            case NavigationApi.ErrorCode.NETWORK_ERROR:
                                displayMessage("Error loading Navigation SDK: Network error.",
                                        DISPLAY_BOTH);
                                break;
                            case NavigationApi.ErrorCode.LOCATION_PERMISSION_MISSING:
                                displayMessage("Error loading Navigation SDK: Location permission "
                                        + "is missing.", DISPLAY_BOTH);
                                break;
                            default:
                                displayMessage("Error loading Navigation SDK: " + errorCode,
                                        DISPLAY_BOTH);
                        }
                    }
                });
    }

    /**
     * Requests directions from the user's current location to a list of waypoints.
     */
    private void navigateToPlaces() {

        // Set up a waypoint for each place that we want to go to.
        createWaypoint("ChIJq6qq6jauEmsRJAf7FjrKnXI", "Sydney Star");
        createWaypoint("ChIJ3S-JXmauEmsRUcIaWtf4MzE", "Sydney Opera House");
        createWaypoint("ChIJLwgLFGmuEmsRzpDhHQuyyoU", "Sydney Conservatorium of Music");

        // If this journey is already in progress, no need to restart navigation.
        // This can happen when the user rotates the device, or sends the app to the background.
        if (mSavedInstanceState != null
                && mSavedInstanceState.containsKey(KEY_JOURNEY_IN_PROGRESS)
                && mSavedInstanceState.getInt(KEY_JOURNEY_IN_PROGRESS) == 1) {
            return;
        }

        // Create a future to await the result of the asynchronous navigator task.
        ListenableResultFuture<Navigator.RouteStatus> pendingRoute =
                mNavigator.setDestinations(mWaypoints);

        // Define the action to perform when the SDK has determined the route.
        pendingRoute.setOnResultListener(
                new ListenableResultFuture.OnResultListener<Navigator.RouteStatus>() {
                    @Override
                    public void onResult(Navigator.RouteStatus code) {
                        switch (code) {
                            case OK:
                                mJourneyInProgress = true;
                                // Hide the toolbar to maximize the navigation UI.
                                if (getActionBar() != null) {
                                    getActionBar().hide();
                                }

                                // Register some listeners for navigation events.
                                registerNavigationListeners();

                                // Display the time and distance to each waypoint.
                                displayTimesAndDistances();

                                // Enable voice audio guidance (through the device speaker).
                                mNavigator.setAudioGuidance(
                                        Navigator.AudioGuidance.VOICE_ALERTS_AND_GUIDANCE);

                                // Simulate vehicle progress along the route for demo/debug builds.
                                if (BuildConfig.DEBUG) {
                                    mNavigator.getSimulator().simulateLocationsAlongExistingRoute(
                                            new SimulationOptions().speedMultiplier(5));
                                }

                                // Start turn-by-turn guidance along the current route.
                                mNavigator.startGuidance();
                                break;
                            // Handle error conditions returned by the navigator.
                            case NO_ROUTE_FOUND:
                                displayMessage("Error starting navigation: No route found.",
                                        DISPLAY_BOTH);
                                break;
                            case NETWORK_ERROR:
                                displayMessage("Error starting navigation: Network error.",
                                        DISPLAY_BOTH);
                                break;
                            case ROUTE_CANCELED:
                                displayMessage("Error starting navigation: Route canceled.",
                                        DISPLAY_BOTH);
                                break;
                            default:
                                displayMessage("Error starting navigation: "
                                        + String.valueOf(code), DISPLAY_BOTH);
                        }
                    }
                });
    }

    /**
     * Creates a waypoint from a given place ID and title.
     * @param placeId The ID of the place to be converted to a waypoint.
     * @param title A descriptive title for the waypoint.
     */
    private void createWaypoint(String placeId, String title) {
        try {
                mWaypoints.add(
                  Waypoint.builder()
                         .setPlaceIdString(placeId)
                         .setTitle(title)
                         .build()
                );
        } catch (Waypoint.UnsupportedPlaceIdException e) {
            displayMessage("Error starting navigation: Place ID is not supported: " + placeId,
                    DISPLAY_BOTH);
        }
    }

    /**
     * Displays the calculated travel time and distance to each waypoint.
     */
    private void displayTimesAndDistances() {
        List<TimeAndDistance> timesAndDistances = mNavigator.getTimeAndDistanceList();
        int leg = 1;
        String message = "You're on your way!";
        for (TimeAndDistance timeAndDistance : timesAndDistances) {
            message = message + "\nRoute leg: " + leg++
                    + ": Travel time (seconds): " + timeAndDistance.getSeconds()
                    + ". Distance (meters): " + timeAndDistance.getMeters();
        }
        displayMessage(message, DISPLAY_BOTH);
    }

    /**
     * Registers some event listeners to show a message and take other necessary steps
     * when specific navigation events occur.
     */
    private void registerNavigationListeners() {
        // Listens for arrival at a waypoint.
        mNavigator.setArrivalListener(new Navigator.ArrivalListener() {
            @Override
            public void onArrival(ArrivalEvent arrivalEvent) {
                displayMessage("onArrival: You've arrived at a waypoint: "
                        + mNavigator.getCurrentRouteSegment().getDestinationWaypoint().getTitle(),
                        DISPLAY_BOTH);
                // Start turn-by-turn guidance for the next leg of the route.
                if (arrivalEvent.isFinalDestination()) {
                    displayMessage("onArrival: You've arrived at the final destination.",
                            DISPLAY_BOTH);
                } else {
                    mNavigator.continueToNextDestination();
                    mNavigator.startGuidance();
                }
            }
        });

        // Listens for changes in the route.
        mNavigator.setRouteChangedListener(new Navigator.RouteChangedListener() {
            @Override
            public void onRouteChanged() {
                displayMessage("onRouteChanged: The driver's route has changed. Current waypoint: "
                        + mNavigator.getCurrentRouteSegment().getDestinationWaypoint().getTitle(),
                        DISPLAY_LOG);
            }
        });

        // Listens for road-snapped location updates.
        mRoadSnappedLocationProvider =
                NavigationApi.getRoadSnappedLocationProvider(getApplication());
        if (mRoadSnappedLocationProvider != null) {
            mRoadSnappedLocationProvider.requestLocationUpdates(
                    new RoadSnappedLocationProvider.LocationListener() {
                        @Override
                        public void onLocationChanged(LocationEvent locationEvent) {
                            displayMessage("onLocationUpdated: Navigation engine has provided a new"
                                            + " road-snapped location: "
                                            + locationEvent.getLocation().toString(),
                                    DISPLAY_LOG);
                        }
                    });
        } else {
            displayMessage("ERROR: Failed to get a location provider", DISPLAY_LOG);
        }

        // Listens for changes in time or distance.
        mNavigator.setRemainingTimeOrDistanceChangedListener(60, 100,
                new Navigator.RemainingTimeOrDistanceChangedListener() {
                    @Override
                    public void onRemainingTimeOrDistanceChanged() {
                        displayMessage("onRemainingTimeOrDistanceChanged: Time or distance estimate"
                                + " has changed.",
                                DISPLAY_LOG);
                    }
                });
    }

    /**
     * Handles the result of the request for location permissions.
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[],
                                           @NonNull int[] grantResults) {
        mLocationPermissionGranted = false;
        switch (requestCode) {
            case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
                // If request is canceled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    mLocationPermissionGranted = true;
                }
            }
        }
    }

    /**
     * Shows a message on screen and in the log. Used when something goes wrong.
     * @param errorMessage The message to display.
     */
    private void displayMessage(String errorMessage, String displayMedium) {
        if (displayMedium.equals(DISPLAY_BOTH) || displayMedium.equals(DISPLAY_TOAST)) {
            Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
        }

        if (displayMedium.equals(DISPLAY_BOTH) || displayMedium.equals(DISPLAY_LOG)) {
            Log.d(TAG, errorMessage);
        }
    }
}

Add a navigation fragment

The NavigationFragment is the UI component that displays the visual output of navigation, including an interactive map and turn-by-turn directions. You can declare the fragment in your XML layout file as shown below:

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:name="com.google.android.libraries.navigation.NavigationFragment"
    android:id="@+id/navigation_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

Alternatively, you can construct the fragment programmatically, as described in the Android documentation.

For apps using the support version of Fragment, the Navigation SDK provides compatibility through the SupportNavigationFragment. This fragment behaves identically to NavigationFragment, and you can manage it programmatically using FragmentActivity.getSupportFragmentManager().

As an alternative to a fragment, the UI component is also available as a NavigationView. Please note the information at the top of the class description, particularly about the requirement to forward life cycle methods.

Request location permission

Your app must request location permission in order to determine the location of the device.

This tutorial provides the code you need to request fine location permission. For more details, see the guide to Android permissions.

Add the permission as a child of the <manifest> element in your Android manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.navsdkmultidestination">
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
</manifest>

Request runtime permissions in your app, giving the user the opportunity to allow or deny location permission. The following code checks whether the user has granted fine location permission. If not, it requests the permission:

if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
        android.Manifest.permission.ACCESS_FINE_LOCATION)
            == PackageManager.PERMISSION_GRANTED) {
    mLocationPermissionGranted = true;
} else {
    ActivityCompat.requestPermissions(this,
            new String[] { android.Manifest.permission.ACCESS_FINE_LOCATION },
            PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
}

if (!mLocationPermissionGranted) {
    displayMessage("Error loading Navigation SDK: "
            + "The user has not granted location permission.", DISPLAY_BOTH);
    return;
}

Override the onRequestPermissionsResult() callback to handle the result of the permission request:

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[],
                                       @NonNull int[] grantResults) {
    mLocationPermissionGranted = false;
    switch (requestCode) {
        case PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: {
            // If request is canceled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                mLocationPermissionGranted = true;
            }
        }
    }
}

Initialize the Navigation SDK and configure a journey

The NavigationApi class provides initialization logic that authorizes your app to use Google navigation. The Navigator class provides control over configuring and starting/stopping a navigation journey.

Create a helper method to show a message on screen and in the log.

private void displayMessage(String errorMessage, String displayMedium) {
    if (displayMedium.equals(DISPLAY_BOTH) || displayMedium.equals(DISPLAY_TOAST)) {
        Toast.makeText(this, errorMessage, Toast.LENGTH_LONG).show();
    }

    if (displayMedium.equals(DISPLAY_BOTH) || displayMedium.equals(DISPLAY_LOG)) {
        Log.d(TAG, errorMessage);
    }
}

Initialize the Navigation SDK and override the onNavigatorReady() callback to start navigation when the navigator is ready:

NavigationApi.getNavigator(this, new NavigationApi.NavigatorListener() {
            /**
             * Sets up the navigation UI when the navigator is ready for use.
             */
            @Override
            public void onNavigatorReady(Navigator navigator) {
                displayMessage("Navigator ready.", DISPLAY_BOTH);
                mNavigator = navigator;
                mNavFragment = (NavigationFragment) getFragmentManager()
                        .findFragmentById(R.id.navigation_fragment);

                // Set the camera to follow the device location with 'TILTED' driving view.
                mNavFragment.getCamera().followMyLocation(Camera.Perspective.TILTED);

                // Navigate to the specified places.
                navigateToPlaces();
            }

            /**
             * Handles errors from the Navigation SDK.
             * @param errorCode The error code returned by the navigator.
             */
            @Override
            public void onError(@NavigationApi.ErrorCode int errorCode) {
                switch (errorCode) {
                    case NavigationApi.ErrorCode.NOT_AUTHORIZED:
                        displayMessage("Error loading Navigation SDK: Your API key is "
                                + "invalid or not authorized to use the Navigation SDK.",
                                DISPLAY_BOTH);
                        break;
                    case NavigationApi.ErrorCode.TERMS_NOT_ACCEPTED:
                        displayMessage("Error loading Navigation SDK: User did not accept "
                                + "the Navigation Terms of Use.", DISPLAY_BOTH);
                        break;
                    case NavigationApi.ErrorCode.NETWORK_ERROR:
                        displayMessage("Error loading Navigation SDK: Network error.",
                                DISPLAY_BOTH);
                        break;
                    case NavigationApi.ErrorCode.LOCATION_PERMISSION_MISSING:
                        displayMessage("Error loading Navigation SDK: Location permission "
                                + "is missing.", DISPLAY_BOTH);
                        break;
                    default:
                        displayMessage("Error loading Navigation SDK: " + errorCode,
                                DISPLAY_BOTH);
                }
            }
        });

Add a method to create a Waypoint object from a given place ID and title.

private void createWaypoint(String placeId, String title) {
    try {
        mWaypoints.add(
          Waypoint.builder()
                 .setPlaceIdString(placeId)
                 .setTitle(title)
                 .build()
        );
    } catch (Waypoint.UnsupportedPlaceIdException e) {
        displayMessage("Error starting navigation: Place ID is not supported: " + placeId,
                DISPLAY_BOTH);
    }
}

Add a method to display the calculated travel time and distance to each waypoint.

private void displayTimesAndDistances() {
    List<TimeAndDistance> timesAndDistances = mNavigator.getTimeAndDistanceList();
    int leg = 1;
    String message = "You're on your way!";
    for (TimeAndDistance timeAndDistance : timesAndDistances) {
        message = message + "\nRoute leg: " + leg++
                + ": Travel time (seconds): " + timeAndDistance.getSeconds()
                + ". Distance (meters): " + timeAndDistance.getMeters();
    }
    displayMessage(message, DISPLAY_BOTH);
}

Set all the waypoints for this journey. (Note that you may receive an error if you use place IDs for which the navigator cannot plot a route. The sample app in this tutorial uses place IDs for waypoints in Australia. See the notes below about getting different place IDs.) After calculating directions, the NavigationFragment displays a polyline representing the route on the map, with a marker at each waypoint.

private void navigateToPlaces() {

    // Set up a waypoint for each place that we want to go to.
    createWaypoint("ChIJq6qq6jauEmsRJAf7FjrKnXI", "Sydney Star");
    createWaypoint("ChIJ3S-JXmauEmsRUcIaWtf4MzE", "Sydney Opera House");
    createWaypoint("ChIJLwgLFGmuEmsRzpDhHQuyyoU", "Sydney Conservatorium of Music");

    // If this journey is already in progress, no need to restart navigation.
    // This can happen when the user rotates the device, or sends the app to the background.
    if (mSavedInstanceState != null
            && mSavedInstanceState.containsKey(KEY_JOURNEY_IN_PROGRESS)
            && mSavedInstanceState.getInt(KEY_JOURNEY_IN_PROGRESS) == 1) {
        return;
    }

    // Create a future to await the result of the asynchronous navigator task.
    ListenableResultFuture<Navigator.RouteStatus> pendingRoute =
            mNavigator.setDestinations(mWaypoints);

    // Define the action to perform when the SDK has determined the route.
    pendingRoute.setOnResultListener(
            new ListenableResultFuture.OnResultListener<Navigator.RouteStatus>() {
                @Override
                public void onResult(Navigator.RouteStatus code) {
                    switch (code) {
                        case OK:
                            mJourneyInProgress = true;
                            // Hide the toolbar to maximize the navigation UI.
                            if (getActionBar() != null) {
                                getActionBar().hide();
                            }

                            // Register some listeners for navigation events.
                            registerNavigationListeners();

                            // Display the time and distance to each waypoint.
                            displayTimesAndDistances();

                            // Enable voice audio guidance (through the device speaker).
                            mNavigator.setAudioGuidance(
                                    Navigator.AudioGuidance.VOICE_ALERTS_AND_GUIDANCE);

                            // Simulate vehicle progress along the route for demo/debug builds.
                            if (BuildConfig.DEBUG) {
                                mNavigator.getSimulator().simulateLocationsAlongExistingRoute(
                                        new SimulationOptions().speedMultiplier(5));
                            }

                            // Start turn-by-turn guidance along the current route.
                            mNavigator.startGuidance();
                            break;
                        // Handle error conditions returned by the navigator.
                        case NO_ROUTE_FOUND:
                            displayMessage("Error starting navigation: No route found.",
                                    DISPLAY_BOTH);
                            break;
                        case NETWORK_ERROR:
                            displayMessage("Error starting navigation: Network error.",
                                    DISPLAY_BOTH);
                            break;
                        case ROUTE_CANCELED:
                            displayMessage("Error starting navigation: Route canceled.",
                                    DISPLAY_BOTH);
                            break;
                        default:
                            displayMessage("Error starting navigation: "
                                    + String.valueOf(code), DISPLAY_BOTH);
                    }
                }
            });
}

Build and run your app

Connect an Android device to your computer. Follow the instructions to enable developer options on your Android device and configure your system to detect the device. (Alternatively, you can use the Android Virtual Device (AVD) Manager to configure a virtual device. When choosing an emulator, make sure you pick an image that includes the Google APIs.)
In Android Studio, click the Run menu option (or the play button icon). Choose a device as prompted.

Hints for improved user experience

The user must accept the Google Navigation Terms of Service before navigation becomes available. This acceptance is only required once. By default, the SDK prompts for acceptance the first time the navigator is invoked. If you prefer, you can trigger the Navigation Terms of Service dialog at an early point in your app's UX flow, such as during signup or login, using showTermsAndConditionsDialog().
Navigation quality and ETA accuracy are significantly improved if you use place IDs to initialize a waypoint, rather than a latitude/longitude destination.
This sample derives the waypoints from specific place IDs. Other ways to get a place ID include the following:
- Use the place ID finder to get place IDs for specific locations.
- Offer the user the opportunity to choose a destination, by adding a place picker to your app. To try a working sample of the place picker with the Navigation SDK, see the demo app described in the introduction.
- Use the Geocoding API to find the place ID for a given address. The Geocoding API works well if you have complete, unambiguous addresses for the waypoints. See the geocoding best practices guide.
- Use the Places API text search to find the place ID for a given address. The Places API works well if you have incomplete or ambiguous addresses for the waypoints. See the geocoding best practices guide.

Next step

If your contract with Google specifies per-transaction billing, set up your billable transactions. Find out out how to attach event listeners to your navigator, to capture key events such as arrival at the destination.