In this lesson, you will learn how to create an Action with support for option selection. A new View Controller will be implemented and a SingleChoiceAction will be added to it. Via this Action, the Task.Priority and Task.Status properties will be se
在res/drawable文件夹新增一个文件,此文件设置了图片的触发状态,你可以设置 state_pressed,state_checked,state_pressed,state_selected,state_focused,state_enabled 等几个状态: android:state_pressed Boolean. "true" if this item should be used when the object is pressed (such as when a b