attrs.xml文件中属性类型format值的格式

"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"