Offline Routing
Even without an active data connection the applications developed with SDK for Android are able to request routing information to assist traveling from one location to another.
Your application's users do not need to maintain active data connections to calculate routes and render them on a map. It is possible to pre-download updated maps and database information for initiating routing requests while offline. For example, if a user has downloaded offline maps of California and Oregon, a route from San Diego to Portland can be created without any data connection.
For more information about downloading offline maps refer to Preloading Map Data.
Force Online or Offline
setConnectivity(Connectivity)
method on a CoreRouter
instance. Connectivity
has three possible values: - If you launch a request using the
DEFAULT
connectivity mode, the request is performed according to theMapEngine
connectivity setting. If the device is offline whileMapEngine
is set to online mode, the request fails. - If you launch a request using the
ONLINE
connectivity mode, an online request is performed regardless of theMapEngine
connectivity setting. - If you launch a request using the
OFFLINE
connectivity mode, an offline request is performed using cached data regardless of theMapEngine
connectivity setting.
To ensure that the connectivity mode is applied call setConnectivity(Connectivity)
before launching a CoreRouter
calculation request. If a Connectivity.ONLINE
route calculation request fails due to connection issues, HERE SDK returns RoutingError.NETWORK_COMMUNICATION
error code. If a Connectivity.OFFLINE
route calculation request fails due to not enough cached data, HERE SDK returns RoutingError.GRAPH_DISCONNECTED
error code.
CoreRouter
class.