自定义横向Progressbar

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >

<!-- background -->
<item
android:id="@android:id/background"
android:drawable="@drawable/backgroudprogress">
</item>
<!-- progress -->
<item
android:id="@android:id/progress"
android:drawable="@drawable/secondaryprogress">
</item>
<!-- second progress -->

<item
android:id="@android:id/secondaryProgress"
android:drawable="@drawable/secondaryprogress">
</item>

</layer-list>

<style name="mProgress_horizontal">
<item name="android:indeterminateOnly">false</item>
<item name="android:progressDrawable">@drawable/progressbar</item>
<item name="android:indeterminateDrawable">@android:drawable/progress_indeterminate_horizontal</item>
<item name="android:minHeight">5dip</item>
<item name="android:maxHeight">20dip</item>
</style>

style="@style/mProgress_horizontal"