Android应用资源总结七:attrs中format详解

1. reference：参考某一资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>

特别要注意：

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"/>