CustomCompoundToggleButton how to usr MultiSelectToggleGroup?

[gnflance]

In sample compoundtogglebutton(spin card),How to use MultiSelectToggleGroup

if use MultiSelectToggleGroup, button can,t uncheck

[nex3z]

Remove (!isChecked()) && at this line:

    @Override
    public boolean performClick() {
        return (!mPlaying) && super.performClick();
    }