"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="" />
< enum name="vertical" value="" />
< /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 = "" />
< flag name = "stateUnchanged" value = "" />
< flag name = "stateHidden" value = "" />
< flag name = "stateAlwaysHidden" value = "" />
< flag name = "stateVisible" value = "" />
< flag name = "stateAlwaysVisible" value = "" />
< 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"