title: aSync Task can't be executed twice
body: <p>I'm working on app which needs to upload a file to server. But to upload the files it needs to login (working) then get the url (working) then uploading (Force Close)</p>
  
  <p>The logcat:</p>
  
  <pre><code>10-13 14:10:27.494: E/AndroidRuntime(26578): FATAL EXCEPTION: main
  10-13 14:10:27.494: E/AndroidRuntime(26578): java.lang.IllegalStateException: Cannot execute task: the task has already been executed (a task can be executed only once)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:578)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.os.AsyncTask.execute(AsyncTask.java:534)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.spxc.bayfiles.FilesActivity.onOptionsItemSelected(FilesActivity.java:294)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.actionbarsherlock.app.SherlockActivity.onMenuItemSelected(SherlockActivity.java:208)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.actionbarsherlock.ActionBarSherlock.callbackOptionsItemSelected(ActionBarSherlock.java:603)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.actionbarsherlock.internal.ActionBarSherlockNative.dispatchOptionsItemSelected(ActionBarSherlockNative.java:93)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.actionbarsherlock.app.SherlockActivity.onOptionsItemSelected(SherlockActivity.java:159)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.app.Activity.onMenuItemSelected(Activity.java:2566)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:986)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:547)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:115)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.view.View.performClick(View.java:4240)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.view.View$PerformClick.run(View.java:17721)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.os.Handler.handleCallback(Handler.java:730)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.os.Handler.dispatchMessage(Handler.java:92)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.os.Looper.loop(Looper.java:137)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at android.app.ActivityThread.main(ActivityThread.java:5103)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at java.lang.reflect.Method.invokeNative(Native Method)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at java.lang.reflect.Method.invoke(Method.java:525)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:112)
  10-13 14:10:27.494: E/AndroidRuntime(26578):    at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>My code: (handleJsonObject):</p>
  
  <pre><code>private void handleJsonObject(JSONObject object) {
  
          try {
              sUpload = object.getString("uploadUrl");            
              HttpClient httpclient = new DefaultHttpClient();
  
              //post request to send the video 
  
              File sdCardRoot = Environment.getExternalStorageDirectory();
              File myDir = new File(sdCardRoot, "Download");
  
              HttpPost httppost = new HttpPost(sUpload);
              StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
              StrictMode.setThreadPolicy( policy);
              FileBody video_file1 = new FileBody(new File(myDir + "/test.txt"));
              MultipartEntity reqEntity = new MultipartEntity();
              reqEntity.addPart("file=", video_file1);                    
              httppost.setEntity(reqEntity);
  
              // DEBUG
              System.out.println( "executing request " + httppost.getRequestLine( ) );
              HttpResponse response = null;
              try {
                  response = httpclient.execute( httppost );
              } catch (ClientProtocolException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              } catch (IOException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
              HttpEntity resEntity = response.getEntity( );
  
              // DEBUG
              System.out.println( response.getStatusLine( ) );
              if (resEntity != null) {
                try {
                  System.out.println( EntityUtils.toString( resEntity ) );
              } catch (org.apache.http.ParseException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              } catch (IOException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
              } // end if
              if (resEntity != null) {
                try {
                  resEntity.consumeContent( );
              } catch (IOException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
              } // end if
  
              httpclient.getConnectionManager( ).shutdown( );
  
  
          } catch (JSONException e) {
              Log.e("log_tag", "Error parsing data: " + e.toString());
              Crouton.makeText(this, "Something went wrong!", Style.ALERT).show();
          }
      }
  </code></pre>
  
  <p>The code (aSync) Which calls the post code (handleJsonObject):</p>
  
  <pre><code>asyncTask.setJsonListener(new JsonListener() {
                  public void onObjectReturn(JSONObject object) {
                      handleJsonObject(object);
                  }
              });
              asyncTask.execute("http://api.bayfiles.net/v1/file/uploadUrl?session=" + sessionId);
  </code></pre>
  
  <p>I can't figure out why the code won't work?
  Any help is much appreciated!</p>