In 2019, the Android theme is divided into Android Q and developer productivity.
Android Q
Android Q Privacy List
Android Q security
Android Q innovation
Android Q digital Health
Developer productivity
Modernize your application
Modernization Calls to Action
Test your app
Android Q resources
Android Q Labs live features page
Android Q Labs opening speech
What are the updates to Android Q
Android Q modernizes your application
Restrictions on background Activity startup
Android Q partitioned storage
Android Q gesture navigation
Jetpack update
Android Q adaption for foldable devices
Introduction to common system images
Google Play Store policy
Android Q location permission changed
Android Q has a dark theme