自定义属性format详解

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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"             />

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"             />

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"            />

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"            />

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"           />

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"           />

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"            />

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"           />

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>

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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