选中代码再Ctrl+shift+'/' 可加/***/注释

 

https://blog.csdn.net/wuqingsen1/article/details/78554117

styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->

        <!-- 设置无标题 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 设置全屏 -->
        <item name="android:windowFullscreen">true</item>

    </style>

</resources>