Question

在Async Task中设置计时器以进行webservice响应。计时器完成后显示Alrt框。

请帮我怎么做，

我搜索了这个，但没有得到任何满意的答案。

提前致谢

我的一些代码是：

  private class TestTask extends AsyncTask<Integer, Void, Boolean> {
        private long time;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            time = System.currentTimeMillis();
        }

        @Override
        protected Boolean doInBackground(Integer... params) {
            try {

                // Callint Web service 


                String final_link = "";
                final_link = Method_All.removeSpace(final_link);
                Log.d("Bhavik", " " + final_link);
                try {

                    HttpGet get = new HttpGet(new URI(final_link));
                    Log.d("Parser", "XML Get");

            } catch (Exception e) {
                e.printStackTrace();
            }

            return true;
        }

        @Override
        protected void onPostExecute(Boolean result) {
            super.onPostExecute(result);


            // If Time Difference is 1 minut Show Alert Box.


            Log.d("TestTask1", "Currenttime = " + (System.currentTimeMillis()));

            Log.d("TestTask2", "time = "+ time);

            Log.d("TestTask3", "difftime = "
                    + (System.currentTimeMillis() - time));


        }
    }

Answer 1

private Timer timer = new Timer();
private final long DELAY = 500; // in ms
timer.schedule(new TimerTask() {
                        @Override
                        public void run() {
                            runOnUiThread(new Runnable() {
                                public void run() {
                                    //TODO alert dialog code
                                }
                            });
                        }
                    }, DELAY);

我不太确定你是否在寻找这个。请验证。如果它没有回答你的问题。请分享一些代码。

Answer 2

请尝试此代码......

public class MyWebservice extends AsyncTask {


    String wSResponse = "";

    @Override
    protected String doInBackground(String... params) {
       /*starting an individual thread for checking 
           webservice response after specified time */
        new Thread(new Runnable() {

                    @Override
                    public void run() {
                          synchronized (this) {
                            this.wait(your response time in milliss);
                          }
                        if(wSResponse.equals("")){
                          //display alert box and your logic
                        }       

                    }
         }).start();

        // call web service
        wSResponse = webServiceCall(your parameter);

        return null;
    }




}

Answer 3

如果您使用http请求

，也请尝试这个

URL URLObj = null;
HttpURLConnection ConnObj = null;
URLObj = new URL("Http://Url.to.the/webservice");
ConnObj = (HttpURLConnection) URLObj .openConnection();
ConnObj .setConnectTimeout(5000); 
/* This will set the desired time out for the connection request */

Answer 4

您应该设置连接和套接字超时并处理SocketTimeoutException。

try{
  HttpGet httpGet = new HttpGet(url);
  HttpParams httpParameters = new BasicHttpParams();
  // Set the timeout in milliseconds until a connection is established.
  // The default value is zero, that means the timeout is not used. 
  int timeoutConnection = 3000;
  HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
  // Set the default socket timeout (SO_TIMEOUT) 
  // in milliseconds which is the timeout for waiting for data.
  int timeoutSocket = 5000;
  HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

  DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
  HttpResponse response = httpClient.execute(httpGet);
}catch (SocketTimeoutException e){
   return false;
}catch (Exception e){
   return false;
}
return true;

现在当连接或套接字超时发生时，将引发SocketTimeoutException并将在catch块中处理，因此从那里你可以返回false，在onPostExecute中你可以检查结果是否为false，然后显示超时警告对话框。

如果您设置了计时器并且发生了超时并且您显示了警告对话框，那么这是错误的方法，因为您实际上并未关闭连接，因此最终您的连接仍将处于活动状态。

具有异步任务的计时器

4 个答案: