[android] 구글맵 선긋기

* 코드 참고

https://webnautes.tistory.com/1011

Android Google Map에 현재 위치 표시하기( GoogleApiClient, FusedLocationApi 사용)

https://jinseongsoft.tistory.com/23

(Android) Google Map 이동한 거리 선(polyline) 으로 그리기

- 수정한 부분

private LatLng startLatLng = new LatLng(0, 0);       
    private LatLng endLatLng = new LatLng(0, 0);       
    List<Polyline>polylines =new ArrayList<>();

LocationCallback locationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult locationResult) {
            super.onLocationResult(locationResult);

            List<Location> locationList = locationResult.getLocations();

            if (locationList.size() > 0) {
                location = locationList.get(locationList.size() - 1);
                //location = locationList.get(0);

                double latitude =location.getLatitude();
                double longtitude=location.getLongitude();

                if(startLatLng.latitude==0&&startLatLng.longitude==0){
                    startLatLng=new LatLng(latitude,longtitude);
                }

                currentPosition
                        = new LatLng(latitude, longtitude);


                String markerTitle = getCurrentAddress(currentPosition);
                String markerSnippet = "위도:" + String.valueOf(latitude)
                        + " 경도:" + String.valueOf(longtitude);

                Log.d(TAG, "onLocationResult : " + markerSnippet);


                //현재 위치에 마커 생성하고 이동
                setCurrentLocation(location, markerTitle, markerSnippet);

                mCurrentLocatiion = location;
                endLatLng = new LatLng(latitude, longtitude);        
                drawPath();
                startLatLng = new LatLng(latitude, longtitude);
            }
        }
    };