在 Android 上获取 VPN 连接状态

Question

是否可以检查 Android 设备是否连接到 VPN 服务器？ A search in the API 为 Android 1.6 提供了“paltform Highlights”，所以这并没有让我充满信心。

Answer 1

您可以注册到 broadcastreceiver，所有 vpn 状态都会出现在您的应用程序中。

将此添加到应用程序清单：

<receiver android:name=".ConnectivityReceiver">
  <intent-filter>
    <action android:name="vpn.connectivity" />
  </intent-filter>
</receiver>

创建一个类：

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class ConnectivityReceiver extends BroadcastReceiver 
{
  public void onReceive(Context c, Intent intent) 
  {
    String state = intent.getSerializableExtra("connection_state").toString();

    Log.d("**************", state.toString());

    if (state.equals("CONNECTING")) {
      // Do what needs to be done
    }
    else if (state.equals("CONNECTED")) {
      // Do what needs to be done
    }
    else if (state.equals("IDLE")) {
      int errorCode = intent.getIntExtra("err", 0);
      if (errorCode != 0) {
        // Do what needs to be done to report a failure
      }
      else {
        // Normal disconnect
      }
    }
    else if (state.equals("DISCONNECTING")) {
      // Usually not very interesting
    }
  }
}