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 Android教程網 >> Android技術 >> Android開發實例 >> Android自定義屬性 format的深入解析

Android自定義屬性 format的深入解析

編輯:Android開發實例

1. reference:參考某一資源ID。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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

2. color:顏色值。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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

3. boolean:布爾值。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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

4. dimension:尺寸值。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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

5. float:浮點值。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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

6. integer:整型值。
(1)屬性定義:
代碼如下:

<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)屬性使用:
代碼如下:

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

7. string:字符串。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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

8. fraction:百分數。
(1)屬性定義:
代碼如下:

<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)屬性使用:
代碼如下:

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

9. enum:枚舉值。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

<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:位或運算。
 (1)屬性定義:
代碼如下:

<declare-styleable name="名稱">
<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)屬性使用:
代碼如下:

<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:
 屬性定義時可以指定多種類型值。
(1)屬性定義:
代碼如下:

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

(2)屬性使用:
代碼如下:

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