measuring & fade effect of text feature

Author: kyle

SwitchButton/demo/src/main/res/color/custom_text_state_color.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="#327FC2" android:state_checked="true"/>
+    <item android:color="#FFFFFF" android:state_checked="false"/>
+</selector>