当我移动时，如何在谷歌地图上绘制路径？

Question

我正在尝试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，请帮我绘制路径。

由于 Monali

Answer 1

注册LocationListener并在方法onLocationChanged中绘制起点和已到达点之间的路径。

    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

收集阵列中的最新N点。每次更新数组时，都会重绘所有值。使用叠加在其上绘制线条。