android中selector改变界面状态用法小结

先上图，看看效果：

初始效果<wbr><wbr><wbr><img src="https://img-my.youkuaiyun.com/uploads/201206/05/1338890400_3320.jpg" alt=""><wbr><wbr><span></span><wbr><wbr><wbr><wbr><wbr><wbr> 按下后效果<wbr><img src="https://img-my.youkuaiyun.com/uploads/201206/05/1338890418_2725.jpg" alt=""><span></span><wbr><span><br></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

在res/drawable文件夹新增一个XML文件，此文件设置了图片的触发状态，你可以设置以下几个状态

1 android: state_pressed是否点击

2.android: state_checked是否选取

3 android: state_selected是否选中

4 android: state_focused是否获得焦点

5 android: state_enabled设置是否响应事件,指所有事件

根据这些状态，可以设置相应的selector效果

如

Java代码

1. <selector xmlns:android="http://schemas.android.com/apk/res/android"> <wbr><wbr></wbr></wbr>
2. <wbr><wbr></wbr></wbr>
3. <wbr><wbr><wbr><wbr> &lt;item android:state_pressed=</wbr></wbr></wbr></wbr>"true"android:drawable="@drawable/arrow_pressed"/> <wbr><wbr></wbr></wbr>
4. <wbr><wbr><wbr><wbr> &lt;item android:drawable=</wbr></wbr></wbr></wbr>"@drawable/arrow_normal"/> <wbr><wbr></wbr></wbr>
5. <wbr><wbr><wbr><wbr> &lt;item android:state_checked=</wbr></wbr></wbr></wbr>"true"android:drawable="@drawable/arrow_pressed"/> <wbr><wbr></wbr></wbr>
6. </selector><wbr><wbr><wbr></wbr></wbr></wbr>

<wbr><wbr> 实现如下，注意其中的android:src="@drawable/imageselector"</wbr></wbr>

Xml代码

1. <ImageViewandroid:layout_width="wrap_content"<wbr><wbr></wbr></wbr>
2. <wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>android:layout_height="@android:dimen/app_icon_size"<wbr><wbr></wbr></wbr>
3. <wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>android:layout_alignParentRight="true"android:scaleType="fitCenter"<wbr><wbr></wbr></wbr>
4. <wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>android:layout_gravity="center"android:src="@drawable/imageselector"<wbr><wbr></wbr></wbr>
5. <wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>android:clickable="true"android:focusable="true"android:id="@+id/blacklistImageView"<wbr><wbr></wbr></wbr>
6. <wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr>android:layout_marginRight="10dip"/>

如果当触发的控件不是ImageView，而是别的控件，可在代码中用

Java代码

1. blacklistImageView.setPressed(true);<wbr><wbr></wbr></wbr>

Java代码

1. blacklistImageView.setChecked(true);