Why is onCheckedChanged not responding?

Question

I have so far the following code for that allows me to set a value to a textview when I click between toggle buttons that are grouped in a radiogroup. For some reason, it seems like the OnCheckedChanged does not get called. Is this the appproach for this?

//onClickListener method that returns an interface
private View.OnClickListener createClickListener(final int value) {
    return new View.OnClickListener()  {

        @Override
        public void onClick(View view) {

            buttonValue = value;
            buttonState = true;

            ToggleButton clickedButton = (ToggleButton) view;
            RadioGroup radioGroup= (RadioGroup) clickedButton.getParent();
            final TextView num = (TextView) view.findViewById(R.id.num);

            radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                        switch(checkedId){
                            case R.id.number_zero:
                                buttonValue = value;
                                num.setText(buttonValue);
                                System.out.println("Button Value" + buttonValue);
                            case R.id.number_one:
                                buttonValue = value;
                                num.setText(buttonValue);
                                System.out.println("Button Value" + buttonValue);
                            case R.id.number_two:
                                buttonValue = value;
                                num.setText(buttonValue);
                                System.out.println("Button Value" + buttonValue);
                            case R.id.number_three:
                                buttonValue = value;
                                num.setText(buttonValue);
                                System.out.println("Button Value" + buttonValue);
                    }
                    System.out.println("Check changed listener called");
                }
            });

            for (int i = 0; i < radioGroup.getChildCount(); ++i) {
                View nextChild = radioGroup.getChildAt(i);
                if (!(nextChild instanceof ToggleButton)) {
                    continue;
                }
                if (nextChild.getId() != clickedButton.getId() || !clickedButton.isChecked()) {
                    ToggleButton tb2 = (ToggleButton) nextChild;
                    tb2.setChecked(false);
                }
            }

        }

    };
}

Calling using:

zero.setOnClickListener(createClickListener(0));
one.setOnClickListener(createClickListener(1));
two.setOnClickListener(createClickListener(2));
three.setOnClickListener(createClickListener(3))

EDIT:

For some reason, the text is not being set to the TextView of num.

I changed above from

final TextView num = (TextView) view.findViewById(R.id.num);
num.setText(value);

to

num = (TextView) findViewById(R.id.num);
num.setText(Integer.toString(value));

making this:

  TextView num; 

a global variable.

I used the debugger and num is not null and the value is number of the button.