Question

所以我的服务中有这个代码。

public void longPolling(String url) {
    HttpURLConnection connection = null;
    BufferedReader rd = null;
    StringBuilder sb = null;
    String line = null;

    URL serverAddress = null;

    String lastModify = null;
    String etag = null;

    while (true) {

        try {
            serverAddress = new URL(url);
            // set up out communications stuff
            connection = null;

            // Set up the initial connection
            connection = (HttpURLConnection) serverAddress.openConnection();
            connection.setRequestMethod("GET");
            // connection.setDoOutput(true);
            connection.setReadTimeout(60000);

            if (lastModify != null) {
                connection.setRequestProperty("If-Modified-Since",
                        lastModify);
            }

            if (etag != null) {
                connection.setRequestProperty("If-None-Match", etag);
            }

            connection.connect();
            // read the result from the server

            rd = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));

            sb = new StringBuilder();
            while ((line = rd.readLine()) != null) {
                sb.append(line + '\n');
            }

            lastModify = connection.getHeaderField("Last-Modified");
            etag = connection.getHeaderField("Etag");
            String response = java.net.URLDecoder.decode(sb.toString(),
                    "UTF-8");
            sendResults(response); //sends broadcast to activities.

        } catch (MalformedURLException e) {
            log.debug(e);
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
            log.debug(e);
        } catch (IOException e) {
            e.printStackTrace();
            log.debug(e);
        } catch (Exception e) {
            e.printStackTrace();
            log.debug(e);
        } finally { // close the connection, set all objects to null
            connection.disconnect();
            rd = null;
            sb = null;
            connection = null;
        }

    }
}

工作正常。但是当用户退出应用程序时，应该停止服务。但这次民意调查并未停止。即使服务停止，它也会继续运行。

Answer 1

因为你写while（true）创建一个变量并声明最初为true并在服务的onstop（）方法中设置为false并将该变量设置为while（你的变量）即...

停止服务并不会阻止长时间轮询

1 个答案: