如何在移動時在Google地圖上繪製路徑？

Question

我想在谷歌地圖中繪製路徑。我能夠在起點和終點之間繪製一條路徑，但我想在移動時繪製路徑。當我在Google地圖上移動時，請幫助我繪製路徑。

感謝 Monali

Answer 1

註冊LocationListener和方法onLocationChanged繪製起點和已經來點之間的路徑。

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

收集數組中的最新N個點。每次更新數組時，重新繪製所有值。使用Overlay在其上畫線。