Android Selector 按下修改背景和文本颜色的实现代码

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:drawable="@color/colorAccent" android:state_pressed="true"/>  //按下时显示
  <item android:drawable="@color/colorPrimary" />               //默认显示
</selector>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/colorAccent" android:state_pressed="true"/>
<item android:drawable="@color/colorPrimary" />
</selector>

 android:textColor="@color/bg_btn_one" 修改文字
<Button
  android:background="@drawable/bg_btn_two"
  android:textColor="@color/bg_btn_one"
  android:layout_width="match_parent"
  android:layout_height="45dp"
  android:text="点击改变背景颜色"
  android:textSize="20sp"
  android:gravity="center"
  />