Android自定义View中attrs.xml的实例详解

我们在自定义View的时候通常需要先完成attrs.xml文件

在values中定义一个attrs.xml 然后添加相关属性

这一篇先详细介绍一下attrs.xml的属性。

<?xml version="1.0" encoding="utf-8"?><resources> //自定义属性名,定义公共属性 <attr name="titleText" format="string"/> <attr name="titleTextSize" format="dimension"/> <attr name="titleTextColor" format="color"/> <attr name="image" format="reference"/> <attr name="imageScaleType" > <enum name="fillXY" value="0"/> <enum name="center" value="1"/> </attr> //自定义控件的主题样式 <declare-styleable name="CustomImageView"> <attr name="titleText" /> <attr name="titleTextSize" /> <attr name="titleTextColor" /> <attr name="image" /> <attr name="imageScaleType" /> </declare-styleable></resources>

reference：参考某一资源ID。

定义：

<declare-styleable name = "名称"> <attr name = "background" format = "reference" /> </declare-styleable>

使用：

<ImageView android:layout_width = "42dip" android:layout_height = "42dip" android:background = "@drawable/图片ID" />

color：颜色值

定义：

<declare-styleable name = "名称"> <attr name = "textColor" format = "color" /> </declare-styleable>

使用：

<TextView android:layout_width = "42dip" android:layout_height = "42dip" android:textColor = "#00FF00" />

boolean：布尔值

定义：

<declare-styleable name = "名称"> <attr name = "focusable" format = "boolean" /> </declare-styleable>

使用：

<Button android:layout_width = "42dip" android:layout_height = "42dip" android:focusable = "true"/>

dimension：尺寸值

定义：

<declare-styleable name = "名称"> <attr name = "layout_width" format = "dimension" /> </declare-styleable>

使用：

<Button android:layout_width = "42dip" android:layout_height = "42dip" />

float：浮点值

定义：

<declare-styleable name = "AlphaAnimation"> <attr name = "fromAlpha" format = "float" /> <attr name = "toAlpha" format = "float" /> </declare-styleable>

使用：

<alpha android:fromAlpha = "1.0" android:toAlpha = "0.7" />

integer：整型值

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>

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

定义：

<declare-styleable name="名称"> <attr name="orientation"> <enum name="horizontal" value="0" /> <enum name="vertical" value="1" /> </attr> </declare-styleable>

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

<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> lt;/declare-styleable>

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>

属性定义时可以指定多种类型值

定义：

<declare-styleable name = "名称"> <attr name = "background" format = "reference|color" /> </declare-styleable>

使用：

<ImageView android:layout_width = "42dip" android:layout_height = "42dip" android:background = "@drawable/图片ID|#00FF00" />

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