Android自定义属性：attr format取值类型

自定义attrs是format取值类型

reference：参考某一资源ID。

（1）属性定义：

<declare-styleable name = "CustomView">      <attr name = "background" format = "reference" /></declare-styleable>

（2）属性使用：

<CustomView    Android:layout_width = "42dp"    android:layout_height = "42dp"    custom:background = "@drawable/图片ID" />

color：颜色值

（1）属性定义：

<declare-styleable name = "CustomView">       <attr name = "textColor" format = "color" /></declare-styleable>

（2）属性使用：

<CustomView     android:layout_width = "42dp"     android:layout_height = "42dp"     custom:textColor = "#00FF00"     />

boolean：布尔值

（1）属性定义：

<declare-styleable name = "CustomView">       <attr name = "focusable" format = "boolean" /></declare-styleable>

（2）属性使用：

<CustomView     android:layout_width = "42dp"     android:layout_height = "42dp"     custom:focusable = "true"     />

dimension：尺寸值

（1）属性定义：

<declare-styleable name = "CustomView">       <attr name = "layout_width" format = "dimension" /></declare-styleable>

（2）属性使用：

<CustomView     custom:layout_width = "42dp"     android:layout_height = "42dp"     />

float：浮点值。

（1）属性定义：

<declare-styleable name = "AlphaAnimation">       <attr name = "fromAlpha" format = "float" />       <attr name = "toAlpha" format = "float" /></declare-styleable>

（2）属性使用：

<alpha     custom:fromAlpha = "1.0"     custom:toAlpha = "0.7"     />

integer：整型值

（1）属性定义：

<declare-styleable name = "AnimatedRotateDrawable">       <attr name = "visible" />       <attr name = "frameDuration" format="integer" />       <attr name = "framesCount" format="integer" />       <attr name = "pivotX" />       <attr name = "pivotY" />       <attr name = "drawable" /></declare-styleable>

（2）属性使用：

<animated-rotate       xmlns:android = "http://schemas.android.com/apk/res/android"         custom:drawable = "@drawable/图片ID"         custom:pivotX = "50%"         custom:pivotY = "50%"         custom:framesCount = "12"         custom:frameDuration = "100"       />

string：字符串

（1）属性定义：

<declare-styleable name = "CustomView">       <attr name = "apiKey" format = "string" /></declare-styleable>

（2）属性使用：

<CustomView     android:layout_width = "match_parent"     android:layout_height = "match_parent"     custom:apiKey = "123"     />

fraction：百分数

（1）属性定义：

<declare-styleable name="RotateDrawable">       <attr name = "visible" />       <attr name = "fromDegrees" format = "float" />       <attr name = "toDegrees" format = "float" />       <attr name = "pivotX" format = "fraction" />       <attr name = "pivotY" format = "fraction" />       <attr name = "drawable" /></declare-styleable>

（2）属性使用：

<rotate     xmlns:android = "http://schemas.android.com/apk/res/android" 　　             android:interpolator = "@anim/动画ID"     android:fromDegrees = "0" 　　             android:toDegrees = "360"     android:pivotX = "200%"     android:pivotY = "300%" 　　             android:duration = "5000"     android:repeatMode = "restart"     android:repeatCount = "infinite"     />

enum：枚举值

（1）属性定义：

<declare-styleable name="CustomView">       <attr name="orientation">              <enum name="horizontal" value="0" />              <enum name="vertical" value="1" />       </attr>            </declare-styleable>

（2）属性使用：

<CustomView        custom:orientation = "vertical"        android:layout_width = "match_parent"        android:layout_height = "match_parent"        ></LinearLayout>

flag：位或运算

（1）属性定义：

<declare-styleable name="CustomView">       <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>         </declare-styleable>

（2）属性使用：

<activity      android:name = ".StyleAndThemeActivity"      android:label = "@string/app_name"      android:windowSoftInputMode = "stateUnspecified | stateUnchanged　|　stateHidden">      <intent-filter>             <action android:name = "android.intent.action.MAIN" />             <category android:name = "android.intent.category.LAUNCHER" />      </intent-filter></activity>

属性定义时可以指定多种类型值

（1）属性定义：

<declare-styleable name = "CustomView">       <attr name = "background" format = "reference|color" /></declare-styleable>

（2）属性使用：

<CustomView     android:layout_width = "match_parent"     android:layout_height = "match_parent"     custom:background = "@drawable/图片ID|#fff"     />