适用于 Android 3.0 的驱动程序 SDK 版本要求您更新某些操作的代码。本指南简要介绍了相关变更以及迁移代码所需执行的步骤。
软件包名称更改
软件包名称已从 com.google.android.libraries.ridesharing.driver
更改为 com.google.android.libraries.mapsplatform.transportation.driver
。请更新代码中的引用。
初始化 SDK
在早期版本中,您应初始化 Navigation SDK,然后获取对 FleetEngine
类的引用。在驱动程序 SDK v3 中,按如下方式初始化 SDK:
从
NavigationApi
获取Navigator
对象。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; } } );
创建一个
DriverContext
对象,填充必填字段。DriverContext driverContext = DriverContext.builder(application) .setProviderId(providerId) .setVehicleId(vehicleId) .setAuthTokenFactory(authTokenFactory) .setNavigator(navigator) .setRoadSnappedLocationProvider( NavigationApi.getRoadSnappedLocationProvider(application)) .build()
使用
DriverContext
对象初始化*DriverApi
。RidesharingDriverApi ridesharingDriverApi = RidesharingDriverApi.createInstance(driverContext);
从 API 对象获取
NavigationVehicleReporter
。*VehicleReporter
扩展NavigationVehicleReporter
。RidesharingVehicleReporter vehicleReporter = ridesharingDriverApi.getRidesharingVehicleReporter();
启用和停用位置信息更新
在早期版本中,您可以在获取 FleetEngine
引用后启用位置信息更新。在驱动程序 SDK v3 中,按如下方式启用位置信息更新:
RidesharingVehicleReporter reporter = ...;
reporter.enableLocationTracking();
如需更新报告间隔,请使用 RidesharingVehicleReporter.setLocationReportingInterval(long, TimeUnit)
或 DeliveryVehicleReporter.setLocationReportingInterval(long, TimeUnit)
。
驾驶员结束轮班后,通过调用 NavigationVehicleReporter.disableLocationTracking()
停用位置信息更新并将车辆标记为离线。
在服务器上设置车辆状态
在早期版本中,您可以使用 FleetEngine
对象设置车辆状态。在 Driver SDK v3 中,使用 RidesharingVehicleReporter
对象设置车辆状态:
RidesharingVehicleReporter reporter = ...;
reporter.enableLocationTracking();
reporter.setVehicleState(VehicleState.ONLINE);
如需将车辆状态设置为 OFFLINE
,请调用 RidesharingVehicleReporter.disableLocationTracking()
。更新车辆状态的错误会使用 DriverContext
中视情况提供的 StatusListener
集传播。
使用状态监听器的 Error Reporting
ErrorListener
已被移除,并与 StatusListener
结合使用,其定义如下所示:
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.
}
}
正在通过 AuthTokenFactory
进行身份验证
AuthTokenFactory
现在只有一个方法,即 getToken()
,该方法接受 AuthTokenContext
作为参数。拼车客户端必须针对 VEHICLE
服务类型进行身份验证,这样才能启用位置报告和车辆状态(在线/离线)报告。
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);
}
}
}