Android 自定义ProgressBar样式

layout/xxx.xml

 <ProgressBar
 android:id="@+id/progress_style"
 android:layout_width="158dp"
 style="@style/progressbar_bg"
 android:layout_height="11dp"
 android:progress="80"/>

values/styles.xml

<style name="progress_style" parent="@android:style/Widget.ProgressBar.Horizontal">
   <item name="android:progressDrawable">@drawable/progress_bg</item>
<style>

drawable/progress_bg.drawable.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="30dp" />
            <solid android:color="#dddddd" />
        </shape>
    </item>

    <item android:id="@android:id/progress">
        <scale android:scaleWidth="100%">
            <shape>
                <corners android:radius="30dp" />
                <solid android:color="#30ddff" />
            </shape>
        </scale>
    </item>

</layer-list>