Android样式和主题之选择器的实例讲解

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  tools:context=".MainActivity" >  <Button    android:id="@+id/button1"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignParentBottom="true"    android:layout_alignParentLeft="true"    android:layout_marginBottom="189dp"    android:layout_marginLeft="55dp"    android:textColor="@color/button_selector"    android:text="测试颜色列表状态" /></RelativeLayout>

<?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"/>  <item android:state_focused="true" android:color="#ff0000ff"/>  <item android:color="#ff000000"/></selector>