41. 参考文献
● Android Dev Summit 2019
○ https://developer.android.com/dev-summit?gclid=Cj0KCQiA2ITuBRDkARIsAMK9Q7PZxoN7XBamxYTTboACFryTHfzC
nEUt6bExi59fZvKHMzaFVHv2Ht0aAgiMEALw_wcB
● Keynote
https://www.youtube.com/watch?v=5jJ-e278BFY
● What's New in Android Studio (Android Dev Summit '19)
○ https://www.youtube.com/watch?v=XPMrnR1_Biw
● Google Play Billing: The “Purchase Anywhere” Paradigm Shift
○ https://www.youtube.com/watch?v=L2aiHRD6Pfk&list=PLWz5rJ2EKKc_x
XXubDti2eRnIKU0p7wHd
●