progerssbar-style 属性分析

 <ProgressBar
                android:id="@+id/progress_bar"
                style="@style/Voiceunlock.Theme.ProgressBar.Horizontal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="30dip"
                android:layout_marginStart="30dip"
                android:max="100"
                />

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background"
            android:drawable="@drawable/scrubber_bg_funui" />
    <item android:id="@android:id/secondaryProgress">
        <scale android:scaleWidth="100%"
               android:drawable="@drawable/scrubber_secondary_funui" />
    </item>
    <item android:id="@android:id/progress">
        <scale android:scaleWidth="100%"
               android:drawable="@drawable/scrubber_primary_funui" />
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <drawable name="scrubber_bg_funui">#000000</drawable>
    <drawable name="scrubber_secondary_funui">#ff0000</drawable>
    <drawable name="scrubber_primary_funui">#00ff00</drawable>
</resources>