android程序启动时去掉一瞬间的系统背景界面

记录一下，方便每次自己找代码~ ╮(╯▽╰)╭ ~

<!-- Application theme. -->

<style
name="AppTheme"
parent="AppBaseTheme">

<!-- All customizations that are NOT specific to a particular API-level can go here. -->

<item
name="android:windowNoTitle">true</item>

<item
name="android:background">#00000000</item>

<item
name="android:windowBackground">@android:color/transparent</item>

<item
name="android:colorBackgroundCacheHint">@null</item>

<item
name="android:windowIsTranslucent">true</item>

</style>