text: <?xml version="1.0" encoding="utf-8"?>
  <selector xmlns:android="http://schemas.android.com/apk/res/android">
  	<item android:color="@color/color_ec4a48" android:state_checked="true" />
  	<item android:color="@color/color_ec4a48" android:state_pressed="true" />
  	<item android:color="@color/color_ec4a48" android:state_selected="true" />
  	<!--必须放在最后一行，否则上面的效果全都不能用-->
  	<item android:color="@color/white"/>
  </selector>