保持连接打开并读取数据，直到强行关闭

当我的活动加载时，我正在连接到网络服务。当我得到服务的响应时，我再次致电服务人员，依此类推。

@Override
protected void onCreate(Bundle savedInstanceState) {  
….  
callWebMethod();
}  

// Called on getting response  
@Override
public void run(String value) {  
….  
callWebMethod();  
}  

这就是我连接服务的方式

HttpGet request = new HttpGet(url + combinedParams);  
HttpClient client = new DefaultHttpClient(httpParameters);

    HttpResponse httpResponse;

        httpResponse = client.execute(request);
        responseCode = httpResponse.getStatusLine().getStatusCode();
        message = httpResponse.getStatusLine().getReasonPhrase();

        HttpEntity entity = httpResponse.getEntity();

        if (entity != null) {

            InputStream instream = entity.getContent();
            response = convertStreamToString(instream);
            response = StringUtils.remove(response, "\n");
            response = StringUtils.remove(response, '"');
        }  

我是否有可能在开始时仅连接到服务一次，然后连接保持打开状态，应用程序继续从服务读取数据，直到连接被强制关闭。
如果需要更多代码，请告诉我。

Update：然后我尝试使用 ClientConnectionManager 但连接仍然一次又一次地初始化。虽然它正在获取数据。我想要的是连接保持打开状态，并继续从服务读取数据。

HttpParams httpParameters = new BasicHttpParams();

    SharedPreferences preferences = context.getSharedPreferences(
            "MyPreferences", Context.MODE_PRIVATE);

    int timeoutConnection = Integer.parseInt(preferences.getString(
            "timeout", "60")) * 1000;
    HttpConnectionParams.setConnectionTimeout(httpParameters,
            timeoutConnection);

    HttpConnectionParams.setSoTimeout(httpParameters, 2000);
    System.setProperty("http.keepAlive", "true");
    HttpClient client = new DefaultHttpClient(httpParameters);

    ClientConnectionManager mgr = client.getConnectionManager();
    client = new DefaultHttpClient(new ThreadSafeClientConnManager(
            client.getParams(), mgr.getSchemeRegistry()),
            client.getParams());
    while (true) {

        HttpResponse httpResponse;

        try {
            httpResponse = client.execute(request);
            responseCode = httpResponse.getStatusLine().getStatusCode();
            message = httpResponse.getStatusLine().getReasonPhrase();

            HttpEntity entity = httpResponse.getEntity();

            if (entity != null) {

                InputStream instream = entity.getContent();
                response = convertStreamToString(instream);
                response = StringUtils.remove(response, "\n");
                response = StringUtils.remove(response, '"');
                ((Activity) context).runOnUiThread(new Runnable() {
                    public void run() {
                        callback.run(response);  // This calls activity callback function.
                    }
                });

                // Closing the input stream will trigger connection release
                // instream.close();
            }

        } catch (ConnectTimeoutException e) {
         ….  
         }

听起来您真正需要的是套接字连接（请参阅here http://developer.android.com/reference/java/net/Socket.html）。套接字将保持连接状态，并允许您与套接字服务器来回传输数据，直到完成。