Android 3.0 版的驅動程式 SDK 需要針對特定作業更新程式碼。本指南將概述異動內容,以及遷移程式碼時需要採取的行動。
套件名稱變更
套件名稱已從 com.google.android.libraries.ridesharing.driver
變更為 com.google.android.libraries.mapsplatform.transportation.driver
。請更新程式碼中的參照。
初始化 SDK
在先前版本中,您需要初始化 Navigation SDK,然後取得 FleetEngine
類別的參照。在驅動程式 SDK v3 中,依照下列方式初始化 SDK:
從
NavigationApi
取得Navigator
物件。NavigationApi.getNavigator( this, // Activity new NavigationApi.NavigatorListener() { @Override public void onNavigatorReady(Navigator navigator) { // Keep a reference to the Navigator (used to configure and start nav) this.navigator = navigator; } } );
建立
DriverContext
物件,填入必填欄位。DriverContext driverContext = DriverContext.builder(application) .setProviderId(providerId) .setVehicleId(vehicleId) .setAuthTokenFactory(authTokenFactory) .setNavigator(navigator) .setRoadSnappedLocationProvider( NavigationApi.getRoadSnappedLocationProvider(application)) .build()
使用
DriverContext
物件初始化*DriverApi
。RidesharingDriverApi ridesharingDriverApi = RidesharingDriverApi.createInstance(driverContext);
從 API 物件取得
NavigationVehicleReporter
。*VehicleReporter
擴充NavigationVehicleReporter
。RidesharingVehicleReporter vehicleReporter = ridesharingDriverApi.getRidesharingVehicleReporter();
啟用及停用位置更新功能
在先前版本中,您必須在取得 FleetEngine
參照後啟用位置更新功能。在 Driver SDK v3 中,啟用位置更新功能,如下所示:
RidesharingVehicleReporter reporter = ...;
reporter.enableLocationTracking();
如要更新報表間隔,請使用 RidesharingVehicleReporter.setLocationReportingInterval(long, TimeUnit)
或 DeliveryVehicleReporter.setLocationReportingInterval(long, TimeUnit)
。
駕駛班完成後,請停用位置更新功能,並呼叫 NavigationVehicleReporter.disableLocationTracking()
將車輛標示為離線。
在伺服器上設定車輛狀態
在舊版中,您將使用 FleetEngine
物件設定車輛狀態。在 Driver SDK v3 中,使用 RidesharingVehicleReporter
物件設定車輛狀態:
RidesharingVehicleReporter reporter = ...;
reporter.enableLocationTracking();
reporter.setVehicleState(VehicleState.ONLINE);
如要將車輛狀態設為 OFFLINE
,請呼叫 RidesharingVehicleReporter.disableLocationTracking()
。更新車輛狀態的錯誤會透過 DriverContext
中設定的選用 StatusListener
傳播。
搭配 StatusListener 的 Error Reporting
已移除 ErrorListener
,並與 StatusListener
合併,其定義如下:
class MyStatusListener implements StatusListener {
/** Called when background status is updated, during actions such as location reporting. */
@Override
public void updateStatus(
StatusLevel statusLevel,
StatusCode statusCode,
String statusMsg) {
// Status handling stuff goes here.
// StatusLevel may be DEBUG, INFO, WARNING, or ERROR.
// StatusCode may be DEFAULT, UNKNOWN_ERROR, VEHICLE_NOT_FOUND,
// BACKEND_CONNECTIVITY_ERROR, or PERMISSION_DENIED.
}
}
透過 AuthTokenFactory
進行驗證
AuthTokenFactory
現在只有一個方法 getToken()
,後者會採用 AuthTokenContext
做為參數。共乘用戶端必須驗證 VEHICLE
服務類型,才能啟用位置回報功能和車輛狀態 (線上/離線) 回報功能。
class JsonAuthTokenFactory implements AuthTokenFactory {
String vehicleServiceToken; // initially null
long expiryTimeMs = 0;
// This method is called on a thread whose only responsibility is to send
// location updates. Blocking is OK, but just know that no location updates
// can occur until this method returns.
@Override public String getToken(AuthTokenContext authTokenContext) {
if (System.currentTimeMillis() > expiryTimeMs) {
// The token has expired, go get a new one.
fetchNewToken(vehicleId);
}
if (ServiceType.VEHICLE.equals(authTokenContext.getServiceType)) {
return vehicleServiceToken;
} else {
throw new RuntimeException("Unsupported ServiceType: " + authTokenContext.getServiceType());
}
}
private void fetchNewToken(String vehicleId) {
String url = "https://yourauthserver.example/token/" + vehicleId;
try (Reader r = new URL(url).openStream()) {
com.google.gson.JsonObject obj
= new com.google.gson.JsonParser().parse(r);
vehicleServiceToken = obj.get("VehicleServiceToken").getAsString();
expiryTimeMs = obj.getAsLong("TokenExpiryMs");
// The expiry time could be an hour from now, but just to try and avoid
// passing expired tokens, we subtract 10 minutes from that time.
expiryTimeMs -= 10 * 60 * 1000;
} catch (IOException e) {
// It's OK to throw exceptions here, the StatusListener you passed to
// create the FleetEngine class will be notified and pass along the failed
// update warning.
throw new RuntimeException("Could not get auth token", e);
}
}
}