View (二) 自定义属性 自定义属性的格式详解

自定义属性格式一共有十种;

1. reference:参考某一资源ID。

2. color:颜色值。

3. boolean:布尔值。

4. dimension:尺寸值。

5. float:浮点值。

6. integer:整型值。

7. string:字符串。

8. fraction:百分数。

9. enum:枚举值。

10. flag:位或运算。

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"
/>
上一篇:数据结构(逻辑结构,物理结构,特点) C#多线程编程的同步也线程安全 C#多线程编程笔记 String 与 StringBuilder (StringBuffer) 数据结构与算法-初体验(极客专栏)


下一篇:My first python script for work