title: Fail to pause my android app
body: <p>I would like my android app to pause for a while after receive the resond from the server. I am making use of the following code to try to pause my program:</p>
  
  <pre><code>private Handler mHandler;
  private Runnable mCountUpdater = new Runnable() {
      @Override
      public void run() {
          // TODO Auto-generated method stub
           mHandler.postDelayed(this, 15000); 
      } 
  }; 
  </code></pre>
  
  <p>but no matter I put call the wait in either way mentioned below, it does not work<br>
  1. put inside the button handler:</p>
  
  <pre><code>btnin.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v) {
      // TODO Auto-generated method stub
      //set the values
      grab.onPreExecute("TechID", Build.SERIAL);
      grab.onPreExecute("Type", "Checkin");
      //set the destination and send the request
      grab.execute(new String[]{"http://192.168.1.150/Me/check.php"});
      //close the activity
      mHandler = new Handler(); 
      mHandler.post(mCountUpdater);
      finish();
      }
  });
  </code></pre>
  
  <p>2.put in the onPostExecute() method of AsynTask:</p>
  
  <pre><code>private class GrabURL extends AsyncTask&lt;String, Void, Void&gt;{
  //ArrayList object for storing the string pairs
  ArrayList&lt;NameValuePair&gt; nameValuePairs;
  
  public GrabURL() { 
      //constructor of the class
      nameValuePairs = new ArrayList&lt;NameValuePair&gt;(); 
  } 
  
  protected void onPreExecute(String key, String value) {
      //store the pair of values into the ArrayList 
      nameValuePairs.add(new BasicNameValuePair(key,value));
  }
  
  @Override
  protected Void doInBackground(String... urls) {
        // TODO Auto-generated method stub
        //Operation being executed in another thread
        try{
            //set up the type of HTTPClient
            HttpClient client = new DefaultHttpClient();
            //set up the location of the server
            HttpPost post = new HttpPost(urls[0]);
            //translate form of pairs to UrlEncodedFormEntity 
            UrlEncodedFormEntity ent = new UrlEncodedFormEntity(nameValuePairs,HTTP.UTF_8);
            //set up the entity being sent by post method
            post.setEntity(ent);
            //execute the url and post the values
            //client.execute(post);
            HttpResponse responsePOST = client.execute(post); 
            HttpEntity resEntity = responsePOST.getEntity();
            line = EntityUtils.toString(resEntity);
      } catch (Exception e) {
          //catch the exception
          line = "Can't connect to server";
      }
      return null;
  }
  
  protected void onPostExecute(Void unused) {
          mRespond.setVisibility(View.VISIBLE); 
          mRespond.setText(line); 
          btnin.setVisibility(View.GONE);
          Toast.makeText(getApplicationContext(), "Value updated", Toast.LENGTH_SHORT).show();
          mHandler = new Handler(); 
          mHandler.post(mCountUpdater);   
  }
  }
  </code></pre>
  
  <p>Is it the way I used to pause the program is incorrect or I have put the wait function in a wrong position?</p>