Question

我的非root用户Android 4.4设备上有第三方VPN应用，并希望编写后台服务来监控VPN连接，并在VPN连接断开时提醒用户。

有办法做到这一点吗？我无法使用VPNService API找到任何方式。

谢谢-D

Answer 1

使用NetworkCapabilities为我工作。您必须遍历所有现有网络并检查哪个网络有VPN_TRANSPORT

ConnectivityManager cm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
Network[] networks = cm.getAllNetworks();

Log.i(TAG, "Network count: " + networks.length);
for(int i = 0; i < networks.length; i++) {

  NetworkCapabilities caps = cm.getNetworkCapabilities(networks[i]);

  Log.i(TAG, "Network " + i + ": " + networks[i].toString());
  Log.i(TAG, "VPN transport is: " + caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN));
  Log.i(TAG, "NOT_VPN capability is: " + caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VPN));

}

Answer 2

这对我有用：从API 16到23测试：

  List<String> networkList = new ArrayList<>();
    try {
        for (NetworkInterface networkInterface : Collections.list(NetworkInterface.getNetworkInterfaces())) {
            if (networkInterface.isUp())
                networkList.add(networkInterface.getName());
        }
    } catch (Exception ex) {
        Timber.d("isVpnUsing Network List didn't received");
    }

    return networkList.contains("tun0");

P.S。它也可以是名为“ppp0”的另一个networkInterface，但在我使用不同VPN应用程序的测试中，它始终是“tun0”

Answer 3

最新答案，已在Android Exception in thread "main" java.util.InputMismatchException at java.base/java.util.Scanner.throwFor(Scanner.java:939) at java.base/java.util.Scanner.next(Scanner.java:1594) at java.base/java.util.Scanner.nextDouble(Scanner.java:2564) at ......NodeList.getNodes(NodeList.java:40) at ......NodeList.<init>(NodeList.java:9) at ......NodeList.main(NodeList.java:47) Process finished with exit code 1上进行了测试：

16 <-> 29

Answer 4

编写一个点击内部网页或ping内部网站的小应用程序......

HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(internal_url);
HttpResponse response = client.execute(request);

String html = "";
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null)
{
    str.append(line);
}
in.close();
html = str.toString();

或

String str = "";
try 
{
    Process process = Runtime.getRuntime().exec(
            "/system/bin/ping -c 8 " + internal_url);
    BufferedReader reader = new BufferedReader(new InputStreamReader(
            process.getInputStream()));
    int i;
    char[] buffer = new char[4096];
    StringBuffer output = new StringBuffer();
    while ((i = reader.read(buffer)) > 0)
        output.append(buffer, 0, i);
    reader.close();


    str = output.toString();

} 
catch (IOException e)
{

    e.printStackTrace();
}
return str;

Answer 5

检查网络信息怎么样？如果有一种类型的VPN，我会假设有一个VPN连接。

需要ACCESS_NETWORK_STATE权限。

            List<NetworkInfo> connectedNetworks    = new ArrayList<>();

        if (Build.VERSION.SDK_INT >= 21)
            {
            Network[] networks = m_ConnectivityManager.getAllNetworks();

            for (Network n : networks)
                {
                NetworkInfo ni = m_ConnectivityManager.getNetworkInfo(n);

                if (ni.isConnectedOrConnecting())
                    {
                    connectedNetworks.add(ni);
                    }
                }
            }
        else
            {
            NetworkInfo[] nis = m_ConnectivityManager.getAllNetworkInfo();

            for (NetworkInfo ni : nis)
                {
                if (ni.isConnectedOrConnecting())
                    {
                    connectedNetworks.add(ni);
                    }
                }
            }

        boolean bHasVPN = false;

        if (Build.VERSION.SDK_INT >= 21)
            {
            for (NetworkInfo ni : connectedNetworks)
                {
                bHasVPN |= (ni.getType() == ConnectivityManager.TYPE_VPN);
                }
            }

Answer 6

检查活动网络是否正在使用VPN的替代方法：

Network activeNetwork = connectivityManager.getActiveNetwork();
NetworkCapabilities caps = connectivityManager.getNetworkCapabilities(activeNetwork);
boolean vpnInUse = caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN);

Answer 7

我为自己编写了一个可以使用API 21及更高版本的帮助函数。

public static boolean vpnActive(Context context){

        //this method doesn't work below API 21
        if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP)
            return false;

        boolean vpnInUse = false;

        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);


        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {

            Network activeNetwork = connectivityManager.getActiveNetwork();
            NetworkCapabilities caps = connectivityManager.getNetworkCapabilities(activeNetwork);

            return caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN);
        }

        Network[] networks = connectivityManager.getAllNetworks();

        for(int i = 0; i < networks.length; i++) {

            NetworkCapabilities caps = connectivityManager.getNetworkCapabilities(networks[i]);
        if(caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {
            vpnInUse = true;
            break;
        }
    }

    return vpnInUse;
}

检查Android中的VPN连接是否处于活动状态？

7 个答案: