android中检查是否联网code

直接贴判断代码了额：

 

    private boolean isNetworkAvailable() {

        ConnectivityManager connManager = (ConnectivityManager) this
                .getSystemService(CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connManager.getActiveNetworkInfo();
        if (networkInfo != null) {
            return networkInfo.isAvailable();
        } else
            return false;
}