Android的VpnService - 如何检查VpnService是否已启动？

问题描述

我有一个使用VpnService类两个应用程序。但是，可以在同一时间只运行一个VPN连接。创建一个新的时和现有的接口被禁用我想新的应用程序不启动vpnservice避免旧得到停用，它的VPN连接。所以，我要检查，如果另一个vpnservice在开始之前调用startService（）。

I have two applications that uses VpnService class. But there can be only one VPN connection running at the same time. The existing interface is deactivated when a new one is created and I want the new application not to start vpnservice to avoid old one getting deactivated and its VPN connection. So I want to check if another vpnservice was started before invoke startService().

有没有API来做到这一点？

Is there any api to do this ?

推荐答案

据我知道你不能检查directly.The下面是我在我的应用程序用于检查VPN连接的方法。

As far as I know you can not check directly.The below is the approach that I use in my application for checking VPN connection.

1）做一个HTTPGET呼吁

1)Make a HTTPGet call for http://jsonip.com

                    public static String GetDeviceIp(){

                    HttpGet req = new HttpGet("http://jsonip.com");

                    DefaultHttpClient httpClient = new DefaultHttpClient();

                    HttpResponse response = httpClient.execute(req); 


                    if (response.getStatusLine().getStatusCode() == 200){
                        ipaddress=parseJson(response.getEntity().getContent());

                    }else
                    { ipaddress ="EMPTY" }

                    return ipaddress
          }

2）解析JSON响应，从响应中提取IP地址

2)Parse the json response and extract the Ip address from response

      public static String parseJson(InputStream in)
      {
         String iP;
        try{

        String result;
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in, "UTF-8"), 8);
        StringBuilder sb = new StringBuilder();

        String line = null;
        while ((line = bufferedReader.readLine()) != null)
        {
            sb.append(line + "\n");
        }
        result = sb.toString(); 

        JSONObject jsonObject = new JSONObject(result);
        iP=jsonObject.getString("ip");
    }catch (Exception e){
        iP="EMPTY";
    }

    return iP;
   }

3）如果VPN服务器的IP并提取ip相等比较，如果这样那么VPN是其他VPN是关闭

3)Compare if VPN server Ip and extracted Ip are equal if so then the VPN is on else VPN is off

public static boolean IsVPNON(){
    return GetDeviceIp().equals("VPN-IP address");}

这篇关于Android的VpnService - 如何检查VpnService是否已启动？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！