Android自定义属性，attr format取值类型

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" />