Android中attr自定义属性详解(format的10种属性值)

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

第二行是自定义标签。
格式如上,其中“xmlns:wen”冒号后面是标签名,在下面使用时(只对当前文件可用)
<TextView  wen:属性名/>
“com.iteye.googlers”是你的工程包名。

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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