Android中自定义属性的格式详解

    技术2022-05-20  38

    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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