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    Android自定义属性 format的深入解析

    2018-04-09 07:41:11 次阅读 稿源:互联网
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    1. reference:参考某一资源ID。
    (1)属性定义:
    代码如下:

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

    (2)属性使用:
    代码如下:

     <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:
    代码如下:

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

    (2)属性使用:
    代码如下:

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

    3. boolean:布尔值。
    (1)属性定义:
    代码如下:

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

    (2)属性使用:
    代码如下:

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

    4. dimension:尺寸值。
    (1)属性定义:
    代码如下:

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

    (2)属性使用:
    代码如下:

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

    5. float:浮点值。
    (1)属性定义:
    代码如下:

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

    (2)属性使用:
    代码如下:

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

    6. integer:整型值。
    (1)属性定义:
    代码如下:

    <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)属性使用:
    代码如下:

    <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:
    代码如下:

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

    (2)属性使用:
    代码如下:

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

    8. fraction:百分数。
    (1)属性定义:
    代码如下:

    <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)属性使用:
    代码如下:

    <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:
    代码如下:

    <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:
    代码如下:

    <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:位或运算。
     (1)属性定义:
    代码如下:

    <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:
    代码如下:

    <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:
     属性定义时可以指定多种类型值。
    (1)属性定义:
    代码如下:

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

    (2)属性使用:
    代码如下:

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

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