Android 自定義View 控件己經(jīng)不是什么新鮮話題,Android Api提供了一大堆基礎(chǔ)組件給我們,需要什么特定功能還需要我們繼承它們?nèi)缓蠖ㄖ聘迂S富的功能。這里介紹一下自定義屬性format
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(1)屬性定義:
<declare-styleable name = "名稱">
<attr name = "background" format = "reference" />
</declare-styleable>
(2)屬性使用:
<ImageView
android:layout_width = "42dip"
android:layout_height = "42dip"
android:background = "@drawable/圖片ID"
/>
2. color:顏色值。
(1)屬性定義:
<declare-styleable name = "名稱">
<attr name = "textColor" format = "color" />
</declare-styleable>
(2)屬性使用:
<TextView
android:layout_width = "42dip"
android:layout_height = "42dip"
android:textColor = "#00FF00"
/>
3. boolean:布爾值。
(1)屬性定義:
<declare-styleable name = "名稱">
<attr name = "focusable" format = "boolean" />
</declare-styleable>
(2)屬性使用:
<Button
android:layout_width = "42dip"
android:layout_height = "42dip"
android:focusable = "true"
/>
4. dimension:尺寸值。
(1)屬性定義:
<declare-styleable name = "名稱">
<attr name = "layout_width" format = "dimension" />
</declare-styleable>
(2)屬性使用:
<Button
android:layout_width = "42dip"
android:layout_height = "42dip"
/>
5. float:浮點值。
(1)屬性定義:
<declare-styleable name = "AlphaAnimation">
<attr name = "fromAlpha" format = "float" />
<attr name = "toAlpha" format = "float" />
</declare-styleable>
(2)屬性使用:
<alpha
android:fromAlpha = "1.0"
android:toAlpha = "0.7"
/>
6. integer:整型值。
(1)屬性定義:
<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)屬性使用:
<animated-rotate
xmlns:android = "http://schemas.android.com/apk/res/android"
android:drawable = "@drawable/圖片ID"
android:pivotX = "50%"
android:pivotY = "50%"
android:framesCount = "12"
android:frameDuration = "100"
/>
7. string:字符串。
(1)屬性定義:
<declare-styleable name = "MapView">
<attr name = "apiKey" format = "string" />
</declare-styleable>
(2)屬性使用:
<com.google.android.maps.MapView
android:layout_width = "fill_parent"
android:layout_height = "fill_parent"
android:apiKey = "0jOkQ80oD1JL9C6HAja99uGXCRiS2CGjKO_bc_g"
/>
8. fraction:百分數(shù)。
(1)屬性定義:
<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)屬性使用:
<rotate
xmlns:android = "http://schemas.android.com/apk/res/android"
android:interpolator = "@anim/動畫ID"
android:fromDegrees = "0"
android:toDegrees = "360"
android:pivotX = "200%"
android:pivotY = "300%"
android:duration = "5000"
android:repeatMode = "restart"
android:repeatCount = "infinite"
/>
9. enum:枚舉值。
(1)屬性定義:
<declare-styleable name="名稱">
<attr name="orientation">
<enum name="horizontal" value="0" />
<enum name="vertical" value="1" />
</attr>
</declare-styleable>
(2)屬性使用:
<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:位或運算。
(1)屬性定義:
<declare-styleable name="名稱">
<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)屬性使用:
<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:
屬性定義時可以指定多種類型值。
(1)屬性定義:
<declare-styleable name = "名稱">
<attr name = "background" format = "reference|color" />
</declare-styleable>
(2)屬性使用:
<ImageView
android:layout_width = "42dip"
android:layout_height = "42dip"
android:background = "@drawable/圖片ID|#00FF00"
/>
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