Recap of some of the features highlighted at Google I/O 2014. Includes RecyclerView, Android Work, Render Thread, Animations, Shadows and Material Design coverage. Also outlines Gradle updates and the latest additions to Android Studio.

1. Google I/O 2014 Recap
Trey Robinson

2. Overview
○ Android Studio
○ Gradle
○ Android Work
○ ART Updates
○ Project Volta
○ Material Design
○ New Roboto
○ Animation
○ Shadows
○ RecyclerView
○ CardView
○ Notifications

3. Android Studio
● Now in BETA!
● Support for Wear, Auto and TV
● Improved Eclipse Migration
● Improved Project Flow
○ Currently Available on Canary Channel (8.4)
● Start Using Android Studio
○ it is still Beta but ...
○ Be Prepared to Switch

4. Gradle
● More Stable
○ No more breaking builds on Studio updates.
● Variants, Flavors, APK Splits
○ Debug, Release, Test, Production, etc.
○ Paid vs Free
○ Split APKs (x86, ARM, etc)
○ Device Specific

5. Android Work
● Unified Interaction Model
● New badge for apps administered by IT
● BYOD Devices - IT Work Profiles
● Company Devices - IT has full control
● New APIs
● Large Scale App Deployment via Play
● Uses Samsung KNOX

6. Goodbye Dalvik - Hello ART
● Why ART?
○ Hardware outpacing software
■ Multiprocessor
■ 4x more RAM
■ 60x more flash memory
○ Dalvik was targeted for ARM architectures

7. ART Features
● No changes for most developers.
● 3 main compilers:
○ L compiler
○ JNI Compiler
○ DEX to DEX optimizer
● Ahead of time compilation
● Improved GC
● 64 Bit Support
● Greatly Improved Alloc

8. Project Volta
● Job Scheduler
○ Defer and Schedule CPU/Battery intensive operations
○ Set Criteria:
■ Network Type (Metered/Unmetered)
■ Battery State (Device Plugged In?)
■ Idle Mode
■ Retry Criteria
■ Deadlines
○ Examples:
■ Database Ops
■ Backups

9. Volta - Battery Stats
● New Battery Stats Utility
○ Partial Wakelock Time
○ Run time
○ Mobile Data Used
○ Signal levels
○ Mobile Radio Activity
○ Signal Scanning Time

10. Volta - Battery Historian
● Visual Display
○ Top:
■ Screen On Time
■ Network State
■ User State (in phone
call?)

11. Material Design
● New Theme (Theme.Material)
● Improved Animation APIs
○ Ripples
○ Activity Transitions
● Depth and Shadows
● Many New APIs
○ RecyclerView!
○ CardView
● New Support Library

12. Material Theme

13. Material Changes
● Theme Colors
● Tint colors for most UI elements
○ NO MORE DRAWABLES FOR ACTIONBAR
COLOR CHANGES!!1!!!111!!1!!!!!!
● Define Bitmaps as an alpha mask and
tint them
● Color Extraction
○ Palette API

14. New Roboto Font

15. Animations - (L Only)
● New Thread Handling
● RippleDrawable
● StateAnimationDrawable
● Reveal
● Custom Interpolation
● Animation Curves
● Activity Transitions

16. Shadows - (L Only)
● Realtime Area Lightsource
● Elevates views above 2D view hierarchy
● Draws outside of bounds
● Animation of Z Translation

18. Card View
● Standard Look
● Real Shadows on L
● Fake Shadows pre-L

19. RecyclerView
● Replaces ListView
● In Support Library
● Built in Animation Support
○ Addition and Removal
● ViewHolder is Now Part of the API
● Grid/List/Custom layout support
PSA: If you are an Android “developer” and you do
not know what a ViewHolder is, then you should
probably look it up.
Ex. A

20. RecyclerView - Cont.

21. Notifications
● Visual Changes
● Expanded Layouts
● Notification On Lock Screen
● Heads-up Presentation Format
● Cloud-sync
● Media Controls

22. Notification - Priority
● Determine Display Order
● High/Max for Heads Up
● Heads Up display over apps

23. Notifications - Lock Screen
● Secure vs Insecure Lockscreen
● User controls what is displayed
○ Public
○ Private
○ Secret

24. Compatibility - Support Lib
● Currently NO AppCompat Material Theme
● RecyclerView
● CardView
● Pallette
● RoundedBitmapDrawable
● ViewPropertyAnimator
● NotificationCompat

25. Running L
● Nexus 5 / 7 Images Available
● L Preview SDK Available via SDK Manager
● Requires JDK 7
● Issues with Support Library
● Check out the API Demos

26. Questions?