谷歌地图Android API v2,如何从地图中删除折线？

Question

我想删除以前添加的折线并在更改位置时重新绘制新的折线.我试过了两个

this.routeToDestination.setPoints(pointsToDestination)和this.routeToDestination.remove()

但他们都没有工作.

我按照如何用Google Maps Android API v2绘制动态线(路线)但无法解决问题

    @Override
    public void onResume() {
        super.onResume();

        routeToDestination = mMap.addPolyline(new PolylineOptions()
                .add(new LatLng(location.getLatitude(), location.getLongitude()),
                        new LatLng(this.destinationLatitude, this.destinationLongitude))
                .width(1)
                .color(Color.DKGRAY)

        );
    }

   @Override
    public void onLocationChanged(Location location) {

        List<LatLng> pointsToDestination = new ArrayList<LatLng>();
        pointsToDestination.add(new LatLng(location.getLatitude(), location.getLongitude()));
        pointsToDestination.add(new LatLng(destinationLatitude, destinationLongitude));

        this.routeToDestination.setPoints(pointsToDestination);
    }

}

Answer 1

要删除折线,您只需使用API​​中所述的remove()方法即可.

//Add line to map
Polyline line = mMap.addPolyline(new PolylineOptions()
            .add(new LatLng(location.getLatitude(), location.getLongitude()),
                    new LatLng(this.destinationLatitude, this.destinationLongitude))
            .width(1)
            .color(Color.DKGRAY)

//Remove the same line from map
line.remove();