title: When app is onPause() I keep on receiving error messages on the LogCat
body: <p>thank you for your help and Happy Christmas.</p>
  
  <p>Ok.</p>
  
  <p>Now I have the following class, which I instantiate in my main activity in order to retrieve some data from the internet.</p>
  
  <p>As you can see the class contains an AsyncTask which performs the data collection form internet.</p>
  
  <p>When my activity is paused (via the BACK button on the emulator) I stop the AsyncTask.</p>
  
  <p>Nevertheless LogCat continues to show messages as the AsyncTask is still continuing to try to fetch data from Internet.</p>
  
  <p>Here is the LogCat, it never stops...</p>
  
  <pre><code>12-24 09:36:48.806: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  12-24 09:36:48.816: E/grabXML(698): Exception fetching data
  12-24 09:36:48.816: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  12-24 09:36:48.836: E/grabXML(698): Exception fetching data
  12-24 09:36:48.836: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  12-24 09:36:48.846: E/grabXML(698): Exception fetching data
  12-24 09:36:48.846: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  12-24 09:36:48.856: E/grabXML(698): Exception fetching data
  12-24 09:36:48.856: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  12-24 09:36:48.966: E/grabXML(698): Exception fetching data
  12-24 09:36:48.966: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  12-24 09:36:48.996: E/grabXML(698): Exception fetching data
  12-24 09:36:48.996: E/grabXML(698): java.lang.IllegalStateException: Manager is shut   down.
  12-24 09:36:49.037: E/grabXML(698): Exception fetching data
  12-24 09:36:49.037: E/grabXML(698): java.lang.IllegalStateException: Manager is shut down.
  </code></pre>
  
  <p>Here is my class </p>
  
  <pre><code>public class Grab{
      public String url;
      public String srt = "cav";
      public boolean flag = false;
      public GrabXml g;
      public Grab (String u){
          url = u;
      } 
  
      public String vai(){
          g = new GrabXml();
          g.execute();
          Log.e("", srt);
          while(!flag){
              // nothing
          };
          g.cancel(true);
          return srt;
      }
  
      public void fermaGrab() {
          g.cancel(true); 
      }
  
      public class GrabXml extends AsyncTask&lt;Void, String, Void&gt;{
          @Override
          protected Void doInBackground(Void... arg0) {
              Log.e("", "arrivo al do in background");
              Log.e("", url);
              DefaultHttpClient client = new DefaultHttpClient();
              HttpGet getMethod = new HttpGet(url);
              try {
                  ResponseHandler&lt;String&gt; responseHandler = new BasicResponseHandler();
                  srt = client.execute(getMethod, responseHandler);
                  Log.e("", "passo per GrabXML");
              }
              catch (Throwable t) {
                  android.util.Log.e("grabXML", "Exception fetching data", t);
              }
              flag = true;
              client.getConnectionManager().shutdown();
              return null;
          }
  
          @Override
          protected void onProgressUpdate(String... item) {
              // nothing
          }
  
          @Override
          protected void onPostExecute(Void unused) {
              flag = true;      
          }
      }
  }
  </code></pre>