小编Ran*_*lan的帖子

我的地图包含多个点以点按用户经过的位置，但是折线未显示在道路上，而是显示了从一个标记到另一个标记的直线。我希望折线穿过马路：随着道路的转弯，它也应该转弯。

这是我的相关代码

 dataholder = FirebaseDatabase.getInstance().getReference("UserLocation");
 Log.d("onMapReady", "iam here");
 dataholder.addValueEventListener(new ValueEventListener() {

     @Override
     public void onDataChange(DataSnapshot dataSnapshot) {
         Log.d("data",String.valueOf(dataSnapshot.getValue()));
         System.out.println(dataSnapshot.getValue());
         for (DataSnapshot a : dataSnapshot.getChildren()) {
             MapData mapData = a.getValue(MapData.class);
             arrayList.add(mapData);
             lati.add(arrayList.get(i).getLatituide());
             longit.add(arrayList.get(i).getLongitude());
             Log.d("mapi","i am in loop");
             mMap = googleMap;
             Double lat = Double.parseDouble(lati.get(i));
             Double longi = Double.parseDouble(longit.get(i));
             sydney = new LatLng(longi, lat);
             points.add(sydney);
             MarkerOptions mop = new MarkerOptions();
             mop.position(sydney);
             mop.title("check");
             mMap.addMarker(mop);
             Log.d("latitude", String.valueOf(lat));
             Log.d("longitude", String.valueOf(longi));
             // Add a marker in Sydney and move the camera
             mMap.addMarker(new MarkerOptions().position(sydney).title("check"));
             mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney)); …