发布于 2016-02-26 01:58:02 | 139 次阅读 | 评论: 0 | 来源: 网友投递

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Android移动端操作系统

Android是一种基于Linux的自由及开放源代码的操作系统,主要使用于移动设备,如智能手机和平板电脑,由Google公司和开放手机联盟领导及开发。尚未有统一中文名称,中国大陆地区较多人使用“安卓”或“安致”。


以下是对Android中的自定义属性format进行了详细的分析介绍,需要的朋友可以过来参考下
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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