【Android进度条】三种方式实现自定义圆形进度条ProgressBar

一、通过动画实现

定义res/anim/loading.xml如下：

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<?xml
version="1.0"
encoding="UTF-8"?> 

<animation-list
android:oneshot="false" 

xmlns:android="http://schemas.android.com/apk/res/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>  

<?xml version="1.0" encoding="UTF-8"?>
<animation-list android:oneshot="false"
xmlns:android="http://schemas.android.com/apk/res/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、通过自定义颜色实现
定义res/drawable/progress_small.xml如下：

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<?xml
version="1.0"
encoding="utf-8"?> 

<rotate
xmlns:android="http://schemas.android.com/apk/res/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> 

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/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、使用一张图片进行自定义

定义res/drawable/progress_small.xml如下：

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<rotate
xmlns:android="http://schemas.android.com/apk/res/android" 

    android:drawable="@drawable/spinner_black_16" 

    android:pivotX="50%" 

    android:pivotY="50%" 

    android:fromDegrees="0" 

    android:toDegrees="360"
/> 

<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/spinner_black_16"
android:pivotX="50%"
android:pivotY="50%"
android:fromDegrees="0"
android:toDegrees="360" />

使用方法都一样, 如下：

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<ProgressBar 

    android:layout_width="wrap_content" 

    android:layout_height="wrap_content" 

    android:indeterminateDrawable="@drawable/progress_small"/> 

<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:indeterminateDrawable="@drawable/progress_small"/>

也可以根据需要通过设置style来设置其大小！ 一般只有使用默认的ProgrressBar的时候采用。对于上述三种自定义的方式，建议修改直接修改图片大小，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"/> 

<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
style="?android:attr/progressBarStyleSmall"
android:indeterminateDrawable="@drawable/progress_small"/>

设置成progressBarStyleSmall后，图标变小。　
设置成progressBarStyleLarge后，图标变大


  



参考：
http://www.eoeandroid.com/forum.php?mod=viewthread&tid=76872