设置虚线：
<?xml version="1.0" encoding="utf-8"?>  <shape xmlns:android="//schemas.android.com/apk/res/android"  
    android:shape="line" >  
    <stroke  
        android:dashGap="3dp"  
        android:dashWidth="6dp"  
        android:width="1dp"  
        android:color="#63a219" />  
    <!-- 虚线的高度 -->  
    <size android:height="1dp" />  </shape>  
其中，破折线的宽度为dashWith，破折线之间的空隙的宽度为dashGap，当dashGap=0dp时，为实线
设置圆角:
<?xml version="1.0" encoding="utf-8"?>  <shape xmlns:android="//schemas.android.com/apk/res/android"   
    android:shape="rectangle">  
    <!-- 填充颜色 -->  
    <solid android:color="#FFFFFF"></solid>  
    <!-- 线的宽度，颜色灰色 -->  
    <stroke android:width="1dp" android:color="#63a219"></stroke>          
    <!-- 矩形的圆角半径 -->  
    <corners android:radius="10dp" />         </shape> 
设置渐变填充和四个圆角半径：
<shape xmlns:android="//schemas.android.com/apk/res/android"   
    android:shape="rectangle">  
    <!--分別對應上面左圆角的半径，上面右圆角的半径，下面左圆角的半径，下面右圆角的半径-->  
    <corners    
          android:topLeftRadius="0dp"  
          android:topRightRadius="7dp"  
          android:bottomLeftRadius="0dp"  
          android:bottomRightRadius="7dp"/>  
    <!--設置漸變-->  
    <gradient android:startColor="#9cff00"   
          android:endColor="#197600"  
          android:angle="270"/>  
    <stroke     
        android:width="1dp"   
        android:color="#63a219" />   </shape>  
设置渐变点击效果：
<style name="list_item_top">  
    <item name="android:clickable">true</item>  
    <item name="android:focusable">true</item>  
    <item name="android:paddingTop">10dip</item>  
    <item name="android:paddingBottom">10dip</item>  
    <item name="android:paddingLeft">10dip</item>  
        <item name="android:paddingRight">10dip</item>  
        <item name="android:gravity">center_vertical</item>  
        <item name="android:background">@drawable/background_view_rounded_top</item>  </style> 
<?xml version="1.0" encoding="UTF-8"?>  <inset xmlns:android="//schemas.android.com/apk/res/android"  
    android:insetLeft="1.0px"  
    android:insetRight="1.0px" >  
  
    <selector>  
        <item android:state_pressed="true">  
            <shape>  
                <gradient  
                    android:angle="270.0"  
                    android:endColor="@color/base_end_color_pressed"  
                    android:startColor="@color/base_start_color_pressed" />  
  
                <corners  
                    android:bottomLeftRadius="0.0dip"  
                    android:bottomRightRadius="0.0dip"  
                    android:radius="2.0dip"  
                    android:topLeftRadius="10.0dip"  
                    android:topRightRadius="10.0dip" />  
                  
                <stroke   
                    android:width="1dp"   
                    android:color="#eededede" />  
            </shape>  
        </item>  
        <item>  
            <shape>  
                <gradient  
                    android:angle="270.0"  
                    android:endColor="@color/base_end_color_default"  
                    android:startColor="@color/base_start_color_default" />  
  
                <corners  
                    android:bottomLeftRadius="0.0dip"  
                    android:bottomRightRadius="0.0dip"  
                    android:radius="2.0dip"  
                    android:topLeftRadius="11.0dip"  
                    android:topRightRadius="11.0dip" />  
                  
                <stroke   
                    android:width="1dp"   
                    android:color="#eededede" />  
            </shape>  
        </item>  
    </selector>  
  </inset>  
关于4.0以上设备虚线会变实线
代码中可以添加：
line.setLayerType(View.LAYER_TYPE_SOFTWARE, null);  
xml中可以添加：
android:layerType="software"

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