Flutter Google 将折线从当前位置映射到另一个位置

Question

I am trying to draw polyline from my current location to another location in flutter, all the examples I have seen online doesn't have a problem with this part of the code.

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

This code above is giving me the error below

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

It looks like you are using flutter_polyline_points package based on the method you used.

Looking at the documentation, it appears that you need to pass the result of getRouteBetweenCoordinates method to PolylineResult instead of List<PointLatLng>

For example:

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