如何在移动时在Google地图上绘制路径？

Question

我想在谷歌地图中绘制路径。我能够在起点和终点之间绘制一条路径，但我想在移动时绘制路径。当我在Google地图上移动时，请帮助我绘制路径。

感谢 Monali

Answer 1

注册LocationListener和方法onLocationChanged绘制起点和已经来点之间的路径。

private void addLocationListener(LocationListener locationListener) { 
    LocationProvider locationProvider = getLocationManager().getProvider(LocationManager.GPS_PROVIDER); 

    getLocationManager().requestLocationUpdates(locationProvider.getName(), LOCATION_UPDATE_INTERVAL, 
      LOCATION_UPDATE_MIN_DISTANCE, locationListener); 
} 

private LocationManager getLocationManager() { 
    return (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); 
} 

private void startGpsListening(Location start) { 
    this.startLocation = start; 
    addLocationListener(new MyLocationListener()); 
} 

private Location startLocation = new Location(""); 

private class MyLocationListener extends LocationListener { 

    public void onLocationChanged(Location location) { 
     Log.d(LOG_TAG, "New location has come: " + location); 
     // draw path between startLocarion and this location 
    } 
    ... 
} 

Answer 2

收集数组中的最新N个点。每次更新数组时，重新绘制所有值。使用Overlay在其上画线。