如何透過Java程式碼呼叫高德地圖API實作路徑規劃功能

import com.amap.api.maps.model.LatLng;
import com.amap.api.services.core.LatLonPoint;
import com.amap.api.services.route.DriveRouteResult;
import com.amap.api.services.route.RouteSearch;
import com.amap.api.services.route.RouteSearch.DriveRouteQuery;
import com.amap.api.services.route.RouteSearch.FromAndTo;
import com.amap.api.services.route.RouteSearch.OnRouteSearchListener;
import com.amap.api.services.route.RouteSearch.WalkRouteQuery;

...
// 创建路径规划查询对象
RouteSearch routeSearch = new RouteSearch(context);
// 设置路径规划查询结果回调
routeSearch.setRouteSearchListener(new OnRouteSearchListener() {
    @Override
    public void onDriveRouteSearched(DriveRouteResult result, int errorCode) {
        // 处理驾车路径规划结果
    }
    ...
});
// 设置起点和终点
FromAndTo fromAndTo = new FromAndTo(new LatLonPoint(startLat, startLng), new LatLonPoint(endLat, endLng));
// 创建驾车路径规划查询对象
DriveRouteQuery query = new DriveRouteQuery(fromAndTo, mode, null, null, "");
// 发起驾车路径规划查询
routeSearch.calculateDriveRouteAsyn(query);

import com.amap.api.maps.model.LatLng;
import com.amap.api.services.core.LatLonPoint;
import com.amap.api.services.route.RouteSearch;
import com.amap.api.services.route.RouteSearch.FromAndTo;
import com.amap.api.services.route.RouteSearch.OnRouteSearchListener;
import com.amap.api.services.route.WalkRouteResult;
import com.amap.api.services.route.WalkRouteQuery;

...
// 创建路径规划查询对象
RouteSearch routeSearch = new RouteSearch(context);
// 设置路径规划查询结果回调
routeSearch.setRouteSearchListener(new OnRouteSearchListener() {
    @Override
    public void onWalkRouteSearched(WalkRouteResult result, int errorCode) {
        // 处理步行路径规划结果
    }
    ...
});
// 设置起点和终点
FromAndTo fromAndTo = new FromAndTo(new LatLonPoint(startLat, startLng), new LatLonPoint(endLat, endLng));
// 创建步行路径规划查询对象
WalkRouteQuery query = new WalkRouteQuery(fromAndTo);
// 发起步行路径规划查询
routeSearch.calculateWalkRouteAsyn(query);

import com.amap.api.maps.model.LatLng;
import com.amap.api.services.core.LatLonPoint;
import com.amap.api.services.route.BusRouteResult;
import com.amap.api.services.route.RouteSearch;
import com.amap.api.services.route.RouteSearch.FromAndTo;
import com.amap.api.services.route.RouteSearch.OnRouteSearchListener;
import com.amap.api.services.route.RouteSearch.BusRouteQuery;

...
// 创建路径规划查询对象
RouteSearch routeSearch = new RouteSearch(context);
// 设置路径规划查询结果回调
routeSearch.setRouteSearchListener(new OnRouteSearchListener() {
    @Override
    public void onBusRouteSearched(BusRouteResult result, int errorCode) {
        // 处理公交路径规划结果
    }
    ...
});
// 设置起点和终点
FromAndTo fromAndTo = new FromAndTo(new LatLonPoint(startLat, startLng), new LatLonPoint(endLat, endLng));
// 创建公交路径规划查询对象
BusRouteQuery query = new BusRouteQuery(fromAndTo, mode, city, 0);
// 发起公交路径规划查询
routeSearch.calculateBusRouteAsyn(query);