Aplikasi Anda dapat memproses peristiwa yang terjadi saat pengguna menavigasi sepanjang rute.
Ringkasan
Gunakan antarmuka berikut untuk memproses peristiwa navigasi:
Melihat kode
Tampilkan/Sembunyikan kode Java untuk aktivitas navigasi.
package com.example.navsdkmultidestination;
import android.content.pm.PackageManager;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import com.google.android.gms.maps.GoogleMap.CameraPerspective;
import com.google.android.libraries.navigation.ArrivalEvent;
import com.google.android.libraries.navigation.ListenableResultFuture;
import com.google.android.libraries.navigation.NavigationApi;
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.SupportNavigationFragment;
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 SupportNavigationFragment mNavFragment;
private final List<Waypoint> mWaypoints = new ArrayList<>();
private Navigator.ArrivalListener mArrivalListener;
private Navigator.RouteChangedListener mRouteChangedListener;
private Navigator.RemainingTimeOrDistanceChangedListener mRemainingTimeOrDistanceChangedListener;
private RoadSnappedLocationProvider.LocationListener mLocationListener;
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.removeArrivalListener(mArrivalListener);
mNavigator.removeRouteChangedListener(mRouteChangedListener);
mNavigator.removeRemainingTimeOrDistanceChangedListener(
mRemainingTimeOrDistanceChangedListener);
if (mRoadSnappedLocationProvider != null) {
mRoadSnappedLocationProvider.removeLocationListener(mLocationListener);
}
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 =
(SupportNavigationFragment)
getSupportFragmentManager().findFragmentById(R.id.navigation_fragment);
// Set the camera to follow the device location with 'TILTED' driving view.
mNavFragment.getMapAsync(
googleMap -> googleMap.followMyLocation(CameraPerspective.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() {
mArrivalListener =
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 arrival at a waypoint.
mNavigator.addArrivalListener(mArrivalListener);
mRouteChangedListener =
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 changes in the route.
mNavigator.addRouteChangedListener(mRouteChangedListener);
// Listens for road-snapped location updates.
mRoadSnappedLocationProvider = NavigationApi.getRoadSnappedLocationProvider(getApplication());
mLocationListener =
new RoadSnappedLocationProvider.LocationListener() {
@Override
public void onLocationChanged(Location location) {
displayMessage(
"onLocationUpdated: Navigation engine has provided a new"
+ " road-snapped location: "
+ location.toString(),
DISPLAY_LOG);
}
@Override
public void onRawLocationUpdate(Location location) {
displayMessage(
"onLocationUpdated: Navigation engine has provided a new"
+ " raw location: "
+ location.toString(),
DISPLAY_LOG);
}
};
if (mRoadSnappedLocationProvider != null) {
mRoadSnappedLocationProvider.addLocationListener(mLocationListener);
} else {
displayMessage("ERROR: Failed to get a location provider", DISPLAY_LOG);
}
mRemainingTimeOrDistanceChangedListener =
new Navigator.RemainingTimeOrDistanceChangedListener() {
@Override
public void onRemainingTimeOrDistanceChanged() {
displayMessage(
"onRemainingTimeOrDistanceChanged: Time or distance estimate" + " has changed.",
DISPLAY_LOG);
}
};
// Listens for changes in time or distance.
mNavigator.addRemainingTimeOrDistanceChangedListener(
60, 100, mRemainingTimeOrDistanceChangedListener);
}
/** 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);
}
}
}
Mendeteksi kedatangan di tujuan
Di sini, tujuan mengacu pada tujuan akhir atau titik jalan. Untuk
mendeteksi kedatangan, panggil Navigator.addArrivalListener()
,
yang mendaftar untuk callback saat perangkat mencapai tujuan.
Saat tiba, Navigation SDK for Android memicu callback
onArrival()
, yang kemudian dapat digunakan untuk menghentikan
panduan belokan demi belokan menggunakan Navigator.stopGuidance()
, atau
melanjutkan ke titik jalan berikutnya menggunakan
Navigator.continueToNextDestination()
. Jika sesi navigasi hanya menyertakan satu tujuan, atau jika tidak ada tujuan yang tersisa dalam daftar tujuan, panggilan
Navigator.continueToNextDestination()
akan otomatis menghentikan panduan.
Saat Anda memanggil continueToNextDestination()
, navigator akan menghapus semua
informasi tentang tujuan sebelumnya. Jika Anda ingin menganalisis informasi tentang segmen rute sebelumnya, Anda harus mengambil informasi dari navigator sebelum memanggil continueToNextDestination()
.
Untuk menghindari kebocoran memori, Anda harus memanggil
removeArrivalListener(listener)
saat Anda tidak lagi
memerlukan pemroses.
mNavigator.addArrivalListener(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();
}
}
});
Menerima pembaruan lokasi
Dapatkan RoadSnappedLocationProvider
dari
NavigationApi
, lalu panggil
RoadSnappedLocationProvider.addLocationListener()
untuk
mendaftar ke callback saat lokasi atau arah perangkat berubah. Perhatikan bahwa lokasi ini disesuaikan dengan jalan, sehingga mungkin berbeda dengan lokasi yang ditampilkan oleh penyedia lokasi gabungan di Location API layanan Google Play.
Navigation SDK memberikan update lokasi sesering
mungkin. Saat update lokasi tersedia, Navigation SDK akan memicu callback onLocationChanged()
.
Pembaruan lokasi yang disesuaikan dengan jalan tidak bergantung pada navigasi, dan dapat berlanjut meskipun navigasi telah berhenti. Berlangganan pembaruan lokasi dapat menyebabkan baterai cepat habis, kebocoran memori, atau pengumpulan data lokasi perangkat yang tidak disengaja jika Anda membiarkan pembaruan lokasi berjalan di latar belakang. Panggil
RoadSnappedLocationProvider.removeLocationListener
saat Anda tidak lagi memerlukan pemroses.
mRoadSnappedLocationProvider =
NavigationApi.getRoadSnappedLocationProvider(getApplication());
if (mRoadSnappedLocationProvider != null) {
mRoadSnappedLocationProvider.addLocationListener(
new RoadSnappedLocationProvider.LocationListener() {
@Override
public void onLocationChanged(Location location) {
displayMessage("onLocationUpdated: Navigation engine has provided a new"
+ " road-snapped location: "
+ location.toString(),
DISPLAY_LOG);
}
});
} else {
displayMessage("ERROR: Failed to get a location provider", DISPLAY_LOG);
}
Menerima info terbaru waktu dan jarak
Panggil
Navigator.addRemainingTimeOrDistanceChangedListener()
untuk mendaftar callback saat waktu yang tersisa (detik) atau jarak
(meter) berubah lebih dari nilai minimum yang ditentukan.
Jika perubahan waktu atau jarak melebihi jumlah yang ditentukan, Navigation SDK akan memicu callback
onRemainingTimeOrDistanceChanged()
.
Untuk mengetahui sisa waktu dan jarak, panggil
Navigator.getTimeAndDistanceList()
. Perhatikan bahwa waktu dan jarak dalam daftar bersifat kumulatif: waktu dan jarak yang ditampilkan adalah dari lokasi saat ini ke setiap titik jalan, bukan dari satu titik jalan ke titik jalan lainnya.
Objek TimeAndDistance
kini juga menampilkan delaySeverity
. Enum ini akan berupa berat, sedang, ringan, atau tidak diketahui. Hal ini sesuai dengan warna yang Anda lihat di ETA pada UI peta (berat = merah, sedang = kuning, ringan = hijau). Hal ini berguna jika Anda perlu membuat footer perkiraan waktu tiba sendiri.
Untuk menghindari kebocoran memori, Anda harus memanggil
Navigator.removeRemainingTimeOrDistanceChangedListener(listener)
saat Anda tidak lagi memerlukan pemroses.
Contoh di bawah meminta callback jika waktu yang tersisa berubah lebih dari
60 detik atau jarak yang tersisa berubah lebih dari 100 meter.
mNavigator.addRemainingTimeOrDistanceChangedListener(60, 100,
new Navigator.RemainingTimeOrDistanceChangedListener() {
@Override
public void onRemainingTimeOrDistanceChanged() {
displayMessage("onRemainingTimeOrDistanceChanged: Time or distance estimate"
+ " has changed.",
DISPLAY_LOG);
}
});
Anda dapat menampilkan informasi waktu dan jarak yang tersisa menggunakan layar bawaan
menggunakan metode setEtaCardEnabled()
dan meneruskan
parameter dengan nilai TRUE
. Untuk menyembunyikan tampilan waktu dan jarak, tetapkan
nilai ini ke FALSE
.
Anda juga dapat menampilkan perkiraan waktu tiba untuk beberapa titik jalan menggunakan metode
getTimeAndDistanceList()
.
Menerima info terbaru rute
Panggil Navigator.addRouteChangedListener()
untuk
mendaftar callback saat rute berubah.
Saat rute berubah, Navigation SDK akan memicu callback
onRouteChanged()
. Anda dapat memanggil
Navigator.getRouteSegments
dan
Navigator.getCurrentRouteSegment()
untuk menemukan rute
baru.
Untuk menghindari kebocoran memori, Anda harus memanggil
removeRouteChangedListener(listener)
saat Anda tidak
lagi memerlukan pemroses.
mNavigator.addRouteChangedListener(new Navigator.RouteChangedListener() {
@Override
public void onRouteChanged() {
displayMessage("onRouteChanged: The driver's route has changed. Current waypoint: "
+ mNavigator.getCurrentRouteSegment().getDestinationWaypoint().getTitle(),
DISPLAY_LOG);
}
});
Mendeteksi saat mode malam berubah
Panggil
NavigationView.addOnNightModeChangedListener
atau
SupportNavigationFragment.addOnNightModeChangedListener
untuk mendaftar callback saat mode malam berubah.
Contoh berikut menunjukkan pemantauan perubahan mode malam pada fragmen
navigasi.
mNavFragment.addOnNightModeChangedListener(new NavigationView.OnNightModeChangedListener() {
@Override
public void onNightModeChanged(NightModeChangedEvent nightModeChangedEvent) {
displayMessage("Night mode is active: " + nightModeChangedEvent.inNightMode(),
DISPLAY_LOG);
}
});
Anda juga dapat menyetel mode malam secara terprogram. Untuk mengetahui informasi selengkapnya, lihat Menyetel mode malam.