public boolean checkNetwork() {    boolean result = false;            try {        Context context = this.getApplicationContext();        ConnectivityManager connectivityMgr = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo networkInfo = connectivityMgr.getActiveNetworkInfo();        if (networkInfo != null) {            result = networkInfo.isAvailable();        }    }    catch (Exception e) {        Log.e("test", "get active network info leave: " + e.getMessage());    }            return result;}