路径规划 最后更新时间: 2021年01月22日

驾车路径规划

该功能实现在两点之间驾车路径的计算，origin、destination 为起点和终点，是必选项，同时可以设置途径点、避免区域、提供多种驾车策略、还可以将兴趣点id作为起点和终点等，详细的参数说明参见参考手册。AMapNavigationSearch 中提供了三个 DrivingNavigation 的重载函数，示例代码（详见demo中CarDrivingNavigation.xaml.cs）如下：

   
private async void GetNavigationDriving(LatLng start, LatLng end)  
{  
  //请求查询，origin、destination为起点和终点，是必选项  
  AMapRouteResults rts = await AMapNavigationSearch.DrivingNavigation(start.longitude, start.latitude, end.longitude, end.latitude, Extensions.All);  
  if (rts.Erro == null)  
  {  
    if (rts.Count == 0)  
    {  
      MessageBox.Show("无查询结果");  
      return;  
    }  
    AMapRoute route = rts.Route;  
    List paths = route.Paths.ToList();    
    List lnglats = new List();  
    foreach (AMapPath item in paths)  
    {  
      Debug.WriteLine("起点终点距离:" + item.Distance);  
      Debug.WriteLine("预计耗时:" + item.Duration / 60 + "分钟");  
      Debug.WriteLine("导航策略:" + item.Strategy);  
      //画路线  
      List steps = item.Steps.ToList();  
      foreach (AMapStep st in steps)  
      {  
        Debug.WriteLine(st.Instruction);  
        lnglats = latLagsFromString(st.Polyline);  
        amap.AddPolyline(new AMapPolylineOptions()  
        {  
          Points = latLagsFromString(st.Polyline),  
          Color = Color.FromArgb(255, 0, 0, 255),  
          Width = 4,  
        });  
      }  
    }  
  }  
  else  
  {  
    MessageBox.Show(rts.Erro.Message);  
  }  
}  

步行路径规划

该功能实现在两点之间步行路径的计算，origin、destination 为起点和终点，是必选项。AMapNavigationSearch 中提供了两个 WalkingNavigation 的重载函数，示例代码（详见demo中WalkingNavigation.xaml.cs）如下：

   
private async void GetNavigationWalking(LatLng start, LatLng end)  
{  
  //请求查询，origin、destination为起点和终点，是必选项  
  AMapRouteResults rts = await AMapNavigationSearch.WalkingNavigation(start.longitude, start.latitude, end.longitude, end.latitude,0);  
  if (rts.Erro == null)  
  {  
    if (rts.Count == 0)  
    {  
      MessageBox.Show("无查询结果");  
      return;  
    }  
    AMapRoute route = rts.Route;  
    List paths = route.Paths.ToList();    
    List lnglats = new List();  
    foreach (AMapPath item in paths)  
    {  
      Debug.WriteLine("起点终点距离:" + item.Distance);  
      Debug.WriteLine("预计耗时:" + item.Duration / 60 + "分钟");  
      Debug.WriteLine("导航策略:" + item.Strategy);  
      //画路线  
      List steps = item.Steps.ToList();  
      foreach (AMapStep st in steps)  
      {  
        Debug.WriteLine(st.Instruction);  
        lnglats = latLagsFromString(st.Polyline);  
        amap.AddPolyline(new AMapPolylineOptions()  
        {  
          Points = latLagsFromString(st.Polyline),  
          Color = Color.FromArgb(255, 0, 0, 255),  
          Width = 4,  
        });  
      }  
    }  
  }  
  else  
  {  
    MessageBox.Show(rts.Erro.Message);  
  }  
}  

公交路径规划

该功能实现在两点之间公交路径的计算，起点(origin)、终点(destination)以及城市（city），是必选项。AMapNavigationSearch 中提供了两个 BusNavigation 的重载函数，示例代码（详见demo中BusIntegratedNavigation.xaml.cs）如下：

private async void GetIntegratedNavigation(LatLng start, LatLng end, string city)  
{  
  //请求查询  
  AMapRouteResults rts = await AMapNavigationSearch.BusNavigation(start.longitude, start.latitude, end.longitude, end.latitude,  0, false, city);  
  if (rts.Erro == null)  
  {  
    if (rts.Count == 0)  
    {  
      MessageBox.Show("无查询结果");  
      return;  
    }  
    AMapRoute route = rts.Route;  
    List transits = route.Transits.ToList();  
    int i = 0;  
    foreach (AMapTransit tr in transits)  
    {  
      i++;  
    }  
    Debug.WriteLine("Transit返回结果数:" + i);  
    List segments = transits.FirstOrDefault(p => p.Segments != null).Segments.ToList();  
    AMapWalking walking = segments.FirstOrDefault(p => p.Walking != null).Walking;  
    int s = 0;  
    foreach (AMapStep sp in walking.Steps)  
    {  
      s++;  
      amap.AddPolyline(new AMapPolylineOptions()  
      {  
        Points = latLagsFromString(sp.Polyline ),  
        Color = Color.FromArgb(255, 0, 0, 255),  
        Width = 4,  
      });  
    }  
    Debug.WriteLine("Step返回结果数:" + s);  
    int b = 0;  
    foreach (AMapBusLine buslines in segments.FirstOrDefault().BusLine)  
    {  
      b++;  
      amap.AddPolyline(new AMapPolylineOptions()  
      {  
        Points = latLagsFromString(buslines.Polyline ),  
        Color = Color.FromArgb(255, 120, 43, 255),  
        Width = 4,  
      });  
    }  
    Debug.WriteLine("BusLine返回结果数:" + b);  
  }  
  else  
  {  
    MessageBox.Show(rts.Erro.Message);  
  }  
}