Android自定义属性，format详解

 

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 "

                     />