Android 判斷是否聯網

下面的方法返回false表示網絡不通

// 檢測網絡
    public static boolean checkNetworkAvailable(Context context) {
        ConnectivityManager connectivity = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity == null) {
            return false;
        } else {
            NetworkInfo[] info = connectivity.getAllNetworkInfo();
            if (info != null) {
                for (int i = 0; i < info.length; i++) {
                    if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                        NetworkInfo netWorkInfo = info[i];
                        if (netWorkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
                            return true;
                        } else if (netWorkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
                            return true;
                        }
                    }
                }
            }
        }

    return false;

}</pre>