在Android上获取VPN连接状态

public class MyVpnService extends VpnService {

    private PendingIntent configureIntent;

    @Override
    public void onCreate() {
        super.onCreate();
        // 设置VPN配置界面的Intent
        configureIntent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // 建立VPN连接
        Builder builder = new Builder();
        builder.setConfigureIntent(configureIntent);
        builder.setSession("MyVPN");
        builder.setMtu(1500);
        builder.addAddress("10.0.0.1", 24);
        builder.addRoute("0.0.0.0", 0);
        builder.addDnsServer("8.8.8.8");
        builder.addDnsServer("8.8.4.4");
        establish(builder.build());

        // 获取VPN连接状态
        List<ConnectionInfo> connections = getActiveConnections();
        if (connections != null && connections.size() > 0) {
            for (ConnectionInfo info : connections) {
                if (info.getState() == ConnectionInfo.STATE_CONNECTED) {
                    // VPN连接成功
                    // 进行相应的处理
                }
            }
        }

        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        // 断开VPN连接
        stopSelf();
    }
}