【Android】Android自定义属性，attr format取值类型

1. reference：参考某一资源ID。

（1）属性定义：

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

（2）属性使用：

<ImageView    android:layout_width = "42dip"     android:layout_height = "42dip"     android:background = "@drawable/图片ID"/>

2. color：颜色值。

（1）属性定义：

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

（2）属性使用：

<TextView    android:layout_width = "42dip"     android:layout_height = "42dip"     android:textColor = "#00FF00"/>

3. boolean：布尔值。

（1）属性定义：

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

（2）属性使用：

<Button    android:layout_width = "42dip"     android:layout_height = "42dip"    android:focusable = "true"/>

4. dimension：尺寸值。

（1）属性定义：

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

（2）属性使用：

<Button    android:layout_width = "42dip"     android:layout_height = "42dip"/>

5. 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     android:fromAlpha = "1.0"     android:toAlpha = "0.7"/>

6. 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"     android:drawable = "@drawable/图片ID"     android:pivotX = "50%"     android:pivotY = "50%"     android:framesCount = "12"     android:frameDuration = "100"/>

7. string：字符串。

（1）属性定义：

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

（2）属性使用：

<com.google.android.maps.MapView     android:layout_width = "fill_parent"     android:layout_height = "fill_parent"     android:apiKey ="0jOkQ80oD1JL9C6HAja99uGXCRiS2CGjKO_bc_g"/>

8. 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"/>

9. enum：枚举值。

（1）属性定义：

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

（2）属性使用：

<LinearLayout    xmlns:android = "http://schemas.android.com/apk/res/android"     android:orientation = "vertical"     android:layout_width = "fill_parent"     android:layout_height = "fill_parent" > </LinearLayout>

10. flag：位或运算。

（1）属性定义：

<declare-styleable name="名称"> <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>

注意：

属性定义时可以指定多种类型值。

（1）属性定义：

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

（2）属性使用：

<ImageView    android:layout_width = "42dip"     android:layout_height = "42dip"     android:background = "@drawable/图片ID|#00FF00"/>

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