attrs.xml文件中属性类型format值的格式

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"reference" //引用 
"color" //颜色 
"boolean" //布尔值 
"dimension" //尺寸值 
"float" //浮点值 
"integer" //整型值 
"string" //字符串 
"fraction" //百分数,比如200% 

枚举型的格式:

<attr name="orientation">  
  <enum name="horizontal" value="0" />  
  <enum name="vertical" value="1" />  
</attr>

XML文件中使用:

android:orientation = "vertical"

标志位、位或运算,格式如下:

<attr name="windowSoftInputMode">  
  <flag name = "stateUnspecified" value = "0" />  
  <flag name = "stateUnchanged" value = "1" />  
  <flag name = "stateHidden" value = "2" />  
  <flag name = "stateAlwaysHidden" value = "3" />  
  <flag name = "stateVisible" value = "4" />  
  <flag name = "stateAlwaysVisible" value = "5" />  
  <flag name = "adjustUnspecified" value = "0x00" />  
  <flag name = "adjustResize" value = "0x10" />  
  <flag name = "adjustPan" value = "0x20" />  
  <flag name = "adjustNothing" value = "0x30" />  
</attr>

XML文件中使用:

android:windowSoftInputMode = "stateUnspecified | stateUnchanged | stateHidden">

属性定义可以指定多种类型:

<attr name = "background" format = "reference|color" />

XML文件中使用:

android:background = "@drawable/图片ID|#00FF00"

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