计算路由摘要
如需使用文本搜索(新)或附近搜索(新)计算响应中每个地点的行程时长和距离,请执行以下操作:
-
在请求中传递
RoutingParameters
参数,并使用setOrigin()
指定路线起点的纬度和经度坐标。此参数是计算响应中每个地点的用时和距离所必需的。 -
构建请求对象时,请添加
.setRoutingSummariesIncluded(true)
。
使用文本搜索(新版)
在以下请求中,您可以计算文本搜索(新)响应中每个地点的行程时长和距离:
// Specify the list of fields to return. final List<Place.Field> placeFields = Arrays.asList(Place.Field.ID, Place.Field.NAME); // Define the routing parameters object and pass the routing origin. RoutingParameters routingParameters = RoutingParameters.builder() .setOrigin(toLatLng("-33.8688, 151.1957362")) .build(); // Use the builder to create a SearchByTextRequest object and pass the routing parameters. // Set setRoutingSummariesIncluded to true. final SearchByTextRequest searchByTextRequest = SearchByTextRequest.builder("Spicy Vegetarian Food in Sydney, Australia", placeFields) .setMaxResultCount(10) .setRoutingParameters(routingParameters) .setRoutingSummariesIncluded(true) .build(); // Call PlacesClient.searchByText() to perform the search. // Define a response handler to process the returned Lists of Place objects, RoutingSummary objects, and Leg objects. placesClient.searchByText(searchByTextRequest) .addOnSuccessListener(response -> { List<Place> places = response.getPlaces(); List<RoutingSummary> routingSummaries = response.getRoutingSummaries(); List<Leg> legs = routingSummaries.get(0).getLegs(); Duration duration = legs.get(0).getDuration(); });
SearchByTextResponse
类表示搜索请求的响应。
您可以调用 SearchByTextResponse.getRoutingSummaries()
来返回路由摘要列表。
SearchByTextResponse
对象还包含:
- 一个
Place
对象列表,表示所有匹配的地点,每个匹配地点对应一个Place
对象。 - 每个
Place
对象仅包含请求中传递的字段列表定义的字段。
使用附近搜索
在此示例中,您将计算附近搜索响应中每个地点的旅行时长和距离。以下示例搜索澳大利亚悉尼的餐馆,并将地理位置限制和路线起点设置为相同的纬度和经度坐标:
// Specify the list of fields to return. final List<Place.Field> placeFields = Arrays.asList(Place.Field.ID, Place.Field.NAME); // Define the search area as a 500 meter diameter circle in Sydney, Australia. LatLng center = new LatLng(-33.8688, 151.1957362); CircularBounds circle = CircularBounds.newInstance(center, /* radius = */ 500); // Define the routing parameters object and pass the routing origin. RoutingParameters routingParameters = RoutingParameters.builder() .setOrigin(toLatLng("-33.8688, 151.1957362")) .build(); // Use the builder to create a SearchNearbyRequest object and pass the routing parameters. // Set setRoutingSummariesIncluded to true. final SearchNearbyRequest searchNearbyRequest = SearchNearbyRequest.builder(/* location restriction = */ circle, placeFields) .setIncludedTypes(includedTypes) .setMaxResultCount(10) .setRoutingParameters(routingParameters) .setRoutingSummariesIncluded(true) .build(); // Call PlacesClient.searchNearby() to perform the search. // Define a response handler to process the returned Lists of Place objects, RoutingSummary objects, and Leg objects. placesClient.searchNearby(searchNearbyRequest) .addOnSuccessListener(response -> { List<Place> places = response.getPlaces(); List<RoutingSummary> routingSummaries = response.getRoutingSummaries(); List<Leg> legs = routingSummaries.get(0).getLegs(); Duration duration = legs.get(0).getDuration(); });
SearchNearbyResponse
类表示搜索请求的响应。
您可以调用 SearchNearbyResponse.getRoutingSummaries()
来返回路由摘要列表。
SearchNearbyResponse
对象还包含:
- 一个
Place
对象列表,表示所有匹配的地点,每个匹配地点对应一个Place
对象。 - 每个
Place
对象仅包含请求中传递的字段列表定义的字段。
您不必为位置限制和路线起点使用相同的坐标。例如,您可以将地理位置限制设置为悉尼的中心点,以将搜索结果限制在该圆圈内。但您随后将路线起点设置为您住宅的坐标,也就是搜索圆圈内的另一个位置。然后,该请求会将搜索结果限制在圆圈内,并根据您住宅的位置计算路线摘要。
指定出行方式
默认情况下,系统会针对汽车计算时长和距离。不过,您可以在搜索中控制车辆类型以及其他选项。
-
使用
routingParameters.setTravelMode()
将传输模式设置为DRIVE
、BICYCLE
、WALK
或TWO_WHEELER
。如需详细了解这些选项,请参阅路线的可用车辆类型。 -
使用
routingParameters.setRoutingPreference()
将路由偏好设置选项设为TRAFFIC_UNAWARE
(默认)、TRAFFIC_AWARE
或TRAFFIC_AWARE_OPTIMAL
。每种选项的数据质量和延迟时间各不相同。如需了解详情,请参阅指定是否要包含流量数据以及如何包含。 -
使用
routingParameters.setRouteModifiers()
指定avoidTolls
、avoidHighways
、avoidFerries
和avoidIndoor
。如需详细了解这些选项,请参阅指定要避开的路线地图项。
在下例中,您将旅行模式指定为 DRIVE
,并避开高速公路:
// Specify the list of fields to return. final List<Place.Field> placeFields = Arrays.asList(Place.Field.ID, Place.Field.NAME); // Define the routing modifiers object. RouteModifiers routeModifiers = RouteModifiers.builder() .setAvoidHighways(true) .build(); // Define the routing parameters object and pass the routing origin. RoutingParameters routingParameters = RoutingParameters.builder() .setOrigin(toLatLng("-33.8688, 151.1957362")) .setTravelMode(DRIVE) .setRouteModifiers(routeModifiers) .build(); // Use the builder to create a SearchByTextRequest object and pass the routing parameters. // Set setRoutingSummariesIncluded to true. final SearchByTextRequest searchByTextRequest = SearchByTextRequest.builder("Spicy Vegetarian Food in Sydney, Australia", placeFields) .setMaxResultCount(10) .setRoutingParameters(routingParameters) .setRoutingSummariesIncluded(true) .build(); // Call PlacesClient.searchByText() to perform the search. // Define a response handler to process the returned Lists of Place objects, RoutingSummary objects, and Leg objects. placesClient.searchByText(searchByTextRequest) .addOnSuccessListener(response -> { List<Place> places = response.getPlaces(); List<RoutingSummary> routingSummaries = result.getRoutingSummaries(); List<Leg> legs = routingSummaries.get(0).getLegs(); Duration duration = legs.get(0).getDuration(); });