Android开发（六）——组件颜色Selector（Selector与Shape的基本用法 ）

andorid控件改变状态时改变颜色，使用selector。

<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 默认时的背景图片-->
    <item android:drawable="@drawable/pic1" />

    <!-- 没有焦点时的背景图片-->
    <item android:state_window_focused="false" android:drawable="@drawable/pic1" />

    <!-- 非触摸模式下获得焦点并单击时的背景图片-->
    <item 
        android:state_focused="true" android:state_pressed="true"
        android:drawable="@drawable/pic2" />

    <!-- 触摸模式下单击时的背景图片-->
    <item android:state_focused="false" android:state_pressed="true"
        android:drawable="@drawable/pic3" />

    <!--选中时的图片背景-->
    <item android:state_selected="true" android:drawable="@drawable/pic4" />

    <!--获得焦点时的图片背景-->
    <item android:state_focused="true" android:drawable="@drawable/pic5" />
</selector>

android:state_selected是选中
android:state_focused是获得焦点
android:state_pressed是点击
android:state_enabled是设置是否响应事件,指所有事件

<?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>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true" android:color="#FFF" />
    <item android:state_focused="true" android:color="#FFF" />
    <item android:state_pressed="true" android:color="#FFF" />
    <item android:color="#000" />
</selector>

实例：

先在values目录创建color.xml文件，在里面加入以下自定义颜色(注意不是用color标签)的代码：

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

然后在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>

最后是测试用的布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/white"
    >
    
    <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"
        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="按钮被禁用"
        android:enabled="false"
        android:textColor="@drawable/btn_color"
        android:background="@drawable/btn_bg"
        />
    
</LinearLayout>

参考：

http://blog.csdn.net/maylian7700/article/details/6978131

http://www.2cto.com/kf/201110/107866.html

http://developer.android.com/guide/topics/resources/color-list-resource.html

 http://blog.csdn.net/lzt623459815/article/details/8538784