android中判断网络是否为wifi

 public static boolean isWifi(Context context) {        ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();        if (activeNetInfo != null                && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {            return true;        }        return false;    }