,可触摸的UI组件至少应该是48 dp高和至少48 dp宽,
On average, 48dp translate to a physical size of about 9mm (with someThis is comfortably in the range of recommended target sizes (7-10 mm) for touchscreen objects and users为了增加这一点,设计文档指出,可触摸的UI组件应该从彼此之间间隔为8dp。但是,操作栏中的项在它们之间的可触摸区域之间没