Android Driver SDK 3.0 遷移指南

適用於 Android 3.0 版的 Driver SDK 要求你更新程式碼對某些作業執行特定作業本指南將概述變更內容以及您不需要遷移程式碼

變更套件名稱

套件名稱已變更為 com.google.android.libraries.ridesharing.driver到 com.google.android.libraries.mapsplatform.transportation.driver。請更新程式碼中的參照

初始化 SDK

在先前的版本中，您會初始化 Navigation SDK，然後取得 FleetEngine 類別的參照。在驅動程式 SDK 中第 3 版是否已初始化 SDK，如下所示：

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，並填入必填欄位。

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 可擴充 NavigationVehicleReporter。
```
RidesharingVehicleReporter vehicleReporter = ridesharingDriverApi.getRidesharingVehicleReporter();
```

啟用及停用位置更新通知

在舊版中，您必須在取得 FleetEngine 參照。在驅動程式 SDK v3 中，啟用位置更新如下：

RidesharingVehicleReporter reporter = ...;

reporter.enableLocationTracking();

如要更新報表間隔，請使用 RidesharingVehicleReporter.setLocationReportingInterval(long, TimeUnit)或 DeliveryVehicleReporter.setLocationReportingInterval(long, TimeUnit)。

駕駛完班後，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

在先前的版本中，您會使用 FleetEngine 物件來設定例如車輛狀態在驅動程式 SDK v3 中，使用 RidesharingVehicleReporter 物件來設定車輛狀態：

  RidesharingVehicleReporter reporter = ...;

  reporter.enableLocationTracking();
  reporter.setVehicleState(VehicleState.ONLINE);

如要將車輛狀態設為 OFFLINE，請呼叫 RidesharingVehicleReporter.disableLocationTracking()。錯誤數更新車輛狀態，可視需求提供的已在 DriverContext 中設定 StatusListener。

使用 StatusListener 的 Error Reporting

已移除 ErrorListener，並與 StatusListener 結合。可以採用以下定義：

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.
  }
}

使用 `AuthTokenFactory` 進行驗證

AuthTokenFactory 現在只有 getToken() 方法， AuthTokenContext 做為參數。共乘服務客戶必須驗證 VEHICLE 服務類型 (啟用定位功能) 回報和車輛狀態 (線上/離線) 報告。

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);
    }
  }
}