Here is the correct ans to it :
$scope.func= function (item) {
navigator.notification.confirm('Delete?', function(button) {
if ( button == 1 ) {
func2(item);
}
});
};
The value of button is the 1 / 2 based of which of the buttons, 'Confirm'/'Cancel' is clicked. In my case 'confirm' button had the value of 1 and so the equality check.