Android selector施用

Android selector应用

--------- drawable保存为.xml
<?xml version="1.0" encoding="utf-8"?>
<selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@drawable/bt13" />
    <item android:drawable="@drawable/bt12" />
</selector>

---------main.xml button设计
 <Button
                android:id="@+id/Button1"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1.0"
                android:background="@drawable/buttontype"
                android:text="点击设计" />