点击Button字体变色，图片变化，背景变化

先在values目录创建color.xml文件

<?xml version="1.0" encoding="utf-8"?>  
<resources>  
    <drawable name="red">#f00</drawable>  
    <drawable name="green">#0f0</drawable>  
    <drawable name="gray">#ccc</drawable>  
</resources> 

在res下新建drawable目录，里面新建btn_bg.xml和btn_color.xml文件，代码如下：

btn_bg.xml

<?xml version="1.0" encoding="utf-8"?>  
<selector xmlns:android="http://schemas.android.com/apk/res/android">  
    <item android:state_window_focused="false" android:state_enabled="true"  
        android:drawable="@drawable/btn_test_normal" />  
    <item android:state_enabled="false" android:drawable="@drawable/btn_test_normal" />  
    <item android:state_pressed="true" android:drawable="@drawable/btn_test_press" />  
    <item android:state_focused="true"
android:drawable="@drawable/btn_test_normal" />  
</selector> 

btn_color.xml

    <?xml version="1.0" encoding="utf-8"?>  
    <selector xmlns:android="http://schemas.android.com/apk/res/android">  
        <item android:state_focused="false" android:state_enabled="true" android:state_pressed="false"  
            android:color="@drawable/red" />  
        <item android:state_enabled="false" android:color="@drawable/gray" />  
        <item android:state_pressed="true" android:color="@drawable/green" />  
        <item android:state_focused="true"  android:color="@drawable/red" />  
    </selector>  

在布局中使用

<Button  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="按下文字会变效果"  
        android:textColor="@drawable/btn_color"  
        android:background="@drawable/btn_bg"  
        />