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>