The Google Play Game Services Java Library allows developers to easily integrate the Google Play Game Services API into their Java applications. Developers can add the library to their Maven or Gradle projects using the code provided, or they can download the necessary jars as a zip file.
The hot new thing in the mobile world is Progressive Web Apps (PWAs) and it’s possible they might spell the end for the humble native mobile app. Google has just effectively green-lighted PWAs to be the future of Android. Mobile expert Henrik Joreteg over at his blog explains.