background transparent style.xml
<item name="android:windowBackground">@color/transparent</item>
<item name="android:windowIsTranslucent">true</item>
Reprinted in: https://my.oschina.net/zhouz/blog/213193
background transparent style.xml
<item name="android:windowBackground">@color/transparent</item>
<item name="android:windowIsTranslucent">true</item>
Reprinted in: https://my.oschina.net/zhouz/blog/213193