android 去掉顶部状态栏及全屏

将res/values下的styles.xml中的：

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
</style>

修改为：

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
        <!-- 隐藏状态栏 -->
        <item name="android:windowFullscreen">true</item>
        <!-- 隐藏标题栏 -->
        <item name="android:windowNoTitle">true</item>
 </style>

参考：https://blog.csdn.net/fuwei52331314/article/details/55823689