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我添加PolylineOption刪除舊的PolylineOptions當添加新PolylineOption如何爲添加更新新的PolylineOptions
OldPolylineOption不會刪除
GMapV2Direction md = new GMapV2Direction();
Document doc = md.getDocument((new LatLng(lat, lng)),(new LatLng(lat2, lng2)),GMapV2Direction.MODE_DRIVING);
ArrayList<LatLng> directionPoint = md.getDirection(doc);
PolylineOptions rectLine = new PolylineOptions();//.width(6).color(Color.RED);
for (int i = 0; i < directionPoint.size(); i++) {
rectLine.add(directionPoint.get(i));
}
Polyline polylin = this.mMap.addPolyline(rectLine);
}