IllegalStateException then add the previously deleted field

Code snippet that fails:

/** * Depending on the value of homeScreen.mNumberEditField, the * mHomeScreen.myTextField is removed or re-added after being * removed.  Does not work, when re-added an IllegalStateException * is thrown. */class MyEditFieldChangeListener implements FieldChangeListener {

    HomeScreen mHomeScreen;

 // the default state, where the mytextfield is showing    int STATE_DEFAULT = 1;

  // we've removed the mytextfield  int STATE_MY_TEXTFIELD_REMOVED = STATE_DEFAULT + 1;

 // current state  int curState = STATE_DEFAULT;

 public NumberEditFieldChangeListener(HomeScreen homeScreen)   {     super();      mHomeScreen = homeScreen; }

   public void fieldChanged(Field field, int context)    {     if (context == PROGRAMMATIC)      {         // ignore "programmatic changes", whatever that means.            return;       }

       if (field == homeScreen.mNumberEditField) {

         int len = homeScreen.mNumberEditField.getTextLength();            switch (len)          {         case 0:

             if (curState == STATE_MY_TEXTFIELD_REMOVED)               {                 // throws IllegalStateException.                  mHomeScreen.add(mHomeScreen.myTextField);                 curState = STATE_DEFAULT;             }

               break;            default:              // is it numeric?             if (isNumeric() == false)             {

                   // remove call log fields                 if (curState == STATE_DEFAULT)                    {                     mHomeScreen.delete(mHomeScreen.myTextField);

                        curState = STATE_MY_TEXTFIELD_REMOVED;                    }

               }             break;            }     }

   }

}

I found a solution that seems to work:

Instead of the call

mHomeScreen.add(mHomeScreen.myTextField);
...
mHomeScreen.delete(mHomeScreen.myTextField);

I tried to use

mHomeScreen.getMainManager().add(mHomeScreen.myTextField);
..
mHomeScreen.getMainManager().delete(mHomeScreen.myTextField);

and the error disappeared.

Tags: BlackBerry Developers

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