Sample for DroidKaigi2019 session

"WebView+ViewGroupを実現するAOSPメールアプリの内部実装とニュースアプリへの応用"
"Internal implemention of AOSP mail app that makes WebView and ViewGroup possible and how to apply it to news apps"
https://droidkaigi.jp/2019/timetable/70923

using Pixel2XL emulator

<ScrollView> 
 <LinerLayout> 
 <Button> 
 <WebView> 
 <Button> 
 </LinerLayout> 
<ScrollView> 

<ArticleContainer> 
 <ArticleWebView> 
 <Button> 
 <Button> 
</ArticleContainer>