drawable文件夹放置动画/形状/选择器等属性文件,唯一的drawable文件名,不允许写错和拼错,否则运行报错。drawable文件夹底下的xml文件可以包括的标签共18个:animation-list bitmap clip color corners gradient inset item(item) layout-list nine-patch padding rotate scale selector shape size solid stroke,18个标签中只有4个标签可以作为根标签:item(item) layout-list selector shape,比如:
 <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<corners android:radius="5dp" />
    <stroke
        android:dashGap="3dp"
        android:dashWidth="3dp"
        android:width="1dp"
        android:color="#DC143C" />
    <size
        android:height="20dp"
        android:width="20dp" />
</shape>
文章来自:钊林IT
原文:http://www.cnblogs.com/dazhao/p/5372690.html