1. 对应的实体类 : ColorStateList

!!! 不做解释 !!!

2. XML 方式

2.1 xml 存放路径 : res/color/filename.xml

2.2 引用方式:

(1) In Java : R.color.filename

(2) In XML : @[package:]color/filename

2.3 XML 语法

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
    
        android:color="hex_color"
        android:state_pressed=["true" | "false"]
        android:state_focused=["true" | "false"]
        android:state_selected=["true" | "false"]
        android:state_checkable=["true" | "false"]
        android:state_checked=["true" | "false"]
        android:state_enabled=["true" | "false"]
        android:state_window_focused=["true" | "false"] />
</selector>

节点 :

---

<selector>

1. 根节点必须是 : <selector>
2. 命名空间(xmlns:android)必须是 :http://schemas.android.com/apk/res/android

<item>

android:color : 颜色 , 必须指定.

2.4 XML 示例代码

---

定义

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"
          android:color="#ffff0000"/> <!-- pressed -->
    <item android:state_focused="true"
          android:color="#ff0000ff"/> <!-- focused -->
    <item android:color="#ff000000"/> <!-- default -->
</selector>

使用

<Button
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/button_text"
    android:textColor="@color/button_text" />