Flutter Google 将折线从当前位置映射到另一个位置

Question

我正在尝试将折线从当前位置绘制到另一个位置，我在网上看到的所有示例都没有这部分代码的问题。

  void setPolylines() async {
    List<PointLatLng> result = await polylinePoints.getRouteBetweenCoordinates(
        googleAPIKey,
        currentLocation.latitude,
        currentLocation.longitude,
        destinationLocation.latitude,
        destinationLocation.longitude);

上面的这段代码给了我下面的错误

A value of type 'PolylineResult' can't be assigned to a variable of type 'List<PointLatLng>'.

Try changing the type of the variable, or casting the right-hand type to 'List<PointLatLng>'.
Open documentation

Too many positional arguments: 3 expected, but 5 found.  Try removing the extra positional arguments, or specifying the name for named arguments. Open documentation

Answer 1

根据您使用的方法，您似乎正在使用flutter_polyline_points 包。

查看文档，看来您需要将getRouteBetweenCoordinates 方法的结果传递给PolylineResult 而不是List<PointLatLng>

例如：

PolylineResult result = await polylinePoints.getRouteBetweenCoordinates(googleAPiKey,
        _originLatitude, _originLongitude, _destLatitude, _destLongitude);