圓形進度條ProgressBar 的實現方式

一、通過動畫實現

定義res/anim/loading.xml如下：

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xmlversion

="1.0"

encoding

="utf-8"

?>

<

animation-list

android:oneshot

="false"

xmlns:android

="">

<

item

android:duration

="150"

android:drawable

="@drawable/loading_01"

/>

<

item

android:duration

="150"

android:drawable

="@drawable/loading_02"

/>

<

item

android:duration

="150"

android:drawable

="@drawable/loading_03"

/>

<

item

android:duration

="150"

android:drawable

="@drawable/loading_04"

/>

<

item

android:duration

="150"

android:drawable

="@drawable/loading_05"

/>

<

item

android:duration

="150"

android:drawable

="@drawable/loading_06"

/>

<

item

android:duration

="150"

android:drawable

="@drawable/loading_07"

/>

animation-list

>

二、通過自定義顏色實現

定義res/drawable/progress_small.xml如下：

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xmlversion

="1.0"

encoding

="utf-8"

?>

<

rotate

xmlns:android

=""android:fromdegrees

="0"

android:pivotx

="50%"

android:pivoty

="50%"

android:todegrees

="360"

>

<

shape

android:innerradiusratio

="3"

android:shape

="ring"

android:thicknessratio

="8"

android:uselevel

="false"

>

<

gradient

android:centercolor

="#ffffff"

android:centery

="0.50"

android:endcolor

="#1e90ff"

android:startcolor

="#000000"

android:type

="sweep"

android:uselevel

="false"

/>

shape

>

rotate

>

三、使用一張進行自定義

定義res/drawable/progress_small.xml如下：

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<

rotate

xmlns:android

=""android:drawable

="@drawable/spinner_black_16"

android:pivotx

="50%"

android:pivoty

="50%"

android:fromdegrees

="0"

android:todegrees

="360"

/>

使用方法都一樣, 如下：

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<

progressbar

android:layout_width

="wrap_content"

android:layout_height

="wrap_content"

android:indeterminatedrawable

="@drawable/progress_small"

/>

也可以根據需要通過設定style來設定其大小！ 一般只有使用預設的progrressbar的時候採用。對於上述三種自定義的方式，建議修改直接修改大小，或者shape；

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<

progressbar

android:layout_width

="wrap_content"

android:layout_height

="wrap_content"

android:layout_centerinparent

="true"

style

="?android:attr/progressbarstylesmall"

android:indeterminatedrawable

="@drawable/progress_small"

/>

設定成progressbarstylesmall後，圖示變小。　

設定成progressbarstylelarge後，圖示變大

參考：

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