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Old 05-27-2009, 08:46 AM   #1 (permalink)
itp
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Default getSelectedIndex() on radiobuttongroup

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I want to build a form with radio buttons and a submit button. I use a FieldChangeListener to capture selection. I think getSelectedIndex() is supposed to retrieve button selected, but I keep getting a null when the button is clicked. I was able to overcome this with an inner class on radiobuttongroup , but I know it is not the best solution.
Can anyone advise?

PHP Code:
 
public class fieldTest extends MainScreen implements FieldChangeListener
{
    
ButtonField button1 null;
    
RadioButtonField radioButtonF1 null;
    
RadioButtonField radioButtonF2 null;
    
RadioButtonField radioButtonF3 null;

    
int valueOfRadioButton 0;
    public 
fieldTest()
    {  
        
super(DEFAULT_MENU DEFAULT_CLOSE);
        
LabelField title = new LabelField("RadioButtonField Example" ,LabelField.ELLIPSIS |  LabelField.USE_ALL_WIDTH); 
        
setTitle(title);  
        
        
LabelField lblAlblB;
        
lblA = new LabelField("Here comes some radioButtonFields in a RadioButtonGroup:");
        
this.add(lblA); 
        
        final 
RadioButtonGroup rbGroup = new RadioButtonGroup();
        
RadioButtonField radioButtonF1 = new RadioButtonField("Radio Option 1"rbGrouptrue);    // turn the first one "on"
        
RadioButtonField radioButtonF2 = new RadioButtonField("Radio Option 2"rbGroupfalse);
        
RadioButtonField radioButtonF3 = new RadioButtonField("Radio Option 3"rbGroupfalse);
        
this.add(radioButtonF1);
        
this.add(radioButtonF2);
        
this.add(radioButtonF3);
        
        
button1 = new ButtonField("Submit");            
        
this.add(button1);
        
button1.setChangeListener(this);        
        
rbGroup.setChangeListener(new FieldChangeListener() {
                      public 
void fieldChanged(Field fieldint context)
                     {          if(
rbGroup.getSelectedIndex() == 0)             
                                               
valueOfRadioButton 0;
                                if(
rbGroup.getSelectedIndex() == 1)             
                                               
valueOfRadioButton 1;          
                                if(
rbGroup.getSelectedIndex() == 2)             
                                               
valueOfRadioButton 2;          
                      }       
               });
              
        
radioButtonF1.setChangeListener(this);
        
radioButtonF2.setChangeListener(this);
        
radioButtonF3.setChangeListener(this);
        
    }
    
// over-ride default onSavePrompt method to avoid being asked if I want to save each time.
    
public boolean onSavePrompt()
    {
        return 
true;
    }         
    
    public 
void fieldChanged(Field fieldint context)
    {
         if(
field instanceof ButtonField)
        {    
             if(
valueOfRadioButton == 0)
                 
Dialog.alert("Option One was selected!");             
             if(
valueOfRadioButton == 1)
                 
Dialog.alert("Option Two was selected!");             
             if(
valueOfRadioButton == 2)
                 
Dialog.alert("Option Three was selected!");              
        }        
    }    

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