android 如何让StatusUtil启动页前面的图片也侵入状态栏

就是 添加一个value-21的style样式文件

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

    <style name="CompatAppTheme" parent="AppBaseTheme">
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowFullscreen">false</item>
        <item name="android:windowActionBar">false</item>
        <item name="windowActionModeOverlay">true</item>
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:statusBarColor">@android:color/transparent</item>
    </style>

</resources>