The RhythemButtonGroup is a group of button, which can use to be the interactor to direct the certain page. this individual wedgit can use without concern about handling it size. IT CAN AUTOMATICLY CACULATE the width and picture in each item's heigh. With this ability, u just need to concern about how many item u need to show on the App's table. u can use this mathod to do this thing: (wait me to update)