是否在打开 WIFI 的情况下检查互联网连接是否可用？

Question

我正在尝试构建一个应用程序，我首先需要检查互联网连接是否可用，即使它连接到没有互联网连接的 WIFI 路由器？从我了解到的消息来源，为了检查这一点，我需要 ping 网站，例如（www.google.com）。请帮我确定我需要包含的确切 sn-p 吗？ 谢谢

Answer 1

这个方法适合我

 public final boolean isInternetOn() {
        // get Connectivity Manager object to check connection
        ConnectivityManager connec =
                (ConnectivityManager) getSystemService(getBaseContext().CONNECTIVITY_SERVICE);

        // Check for network connections
        if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED ||
                connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTING ||
                connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTING ||
                connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED) {
            // if connected with internet
            // Toast.makeText(this, " Connected ", Toast.LENGTH_LONG).show();
            return true;

        } else if (
                connec.getNetworkInfo(0).getState() == NetworkInfo.State.DISCONNECTED ||
                        connec.getNetworkInfo(1).getState() == NetworkInfo.State.DISCONNECTED) {

            //  Toast.makeText(this, " Not Connected ", Toast.LENGTH_LONG).show();
            return false;
        }
        return false;
    }

Answer 2

试试这个：

 public static boolean hasInternet(Context context) {
    ConnectivityManager connMgr = (ConnectivityManager)
            context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
    return networkInfo != null && networkInfo.isConnected();
}