android lollipop: the developer's perspective
TRANSCRIPT
What’s New?
What's new
● Material Design
● Enhanced Notifications
● Concurrent documents in Overview
o Intent.FLAG_ACTIVITY_NEW_DOCUMENT
o ActivityManager.getAppTasks
What’s new
● Project Volta
● 3.1
o With Android Extension Pack
● Webview (updatable)
o WebAudio
Android Runtime Evolved - ART
● Ahead-of-time (AOT) compilation
● Improved garbage collection (GC)
o Less latency (2ms average)
● Separate heap for big assets (bitmaps)
● 64 bit
Dalvik vs Art
Dalvik ART
Uses Just-In-Time (JIT) approach, which
results in lower storage space consumption
but longer app load times
Uses Ahead-Of-Time (AOT) approach,
which compiles apps when they’re
installed, resulting in faster load times
and lower processor usage
Cache builds up over time, so boot times
are faster
Cache is built at first boot, hence
rebooting device takes significantly longer
Works better for lower internal storage
devices as space occupied is lesser
Consumes much more internal storage
space since it stores compiled apps in
addition to the APKs
Tools
● Variants: different versions of the app
(debug vs release or paid vs free)
● APK split combining native with common
code
Google Play Services
Google Play Services
● Android Wear Data API
o Messages API
o Assets API (binary blocks)
o DataItem (sync data among devices)
Google Play Services
● Address API
● OCR scanning of credit cards
● Google Wallet API
o Fragments support
● Google Analytics (with Tag manager)
Google Play Services
● Activity recognition:Walking, running
● Google Cast SDK
● Play Games
Google Play Services
● Security API
● Google Fit
● Drive API
Workplace
● Managed provision and unified view of apps
o Device Owner (device administrator)
● Screen pinning (lock app in the foreground)
● Screen sharing and capture
● Render PDFs as Bitmaps
Media
● Advanced camera capabilities
o RAW support!
● Audio devices: Low Latency audio input
● Media Browser and Media Session API
o Flexible playback control
Connectivity
● BLE Peripheral Device support
o Providing services and scan for services
● Multi Networking
o When you need a particular kind of network
o ConnectivityManager.requestNetwork
o Graceful handoff to another network
● … and a few new platforms
1. Android Wear
2. Android TV
3. Android Auto
Activity and Fragment Transitions
● Activity Transitions
o ActivityOptions.makeSceneTransitionAnimation
o With declared shared elements to make the
transitions smoother
o With the possibilities for enter and exit elements
o All this thanks to the new Render Thread
View Transitions
● Reveal
o Reveal content with a circular expanding mask
Animator reveal = ViewAnimationUtils.createCircularReveal(
viewToReveal, // The new View to reveal
centerX, // x co-ordinate to start the mask from
centerY, // y co-ordinate to start the mask from
startRadius, // radius of the starting mask
endRadius); // radius of the final mask
Curved Motion
● Animation Curves
o New Interpolators
fast-in-slow-out
linear-out-slow-in (enter screen)
fast-out-linear-in (exit screen)
o ObjectAnimator
Iconography
● State Animators
o StateListAnimator and AnimatedStateListDrawable
ie. state of a view changes (checkbox)
o AnimatedVectorDrawable
● Touch feedback ripples
o By default on buttons, very simple otherwise
Colors
● colorPrimary (brand)
● colorAccent (controls)
● colorPrimaryDark (status bar)
● Palette API
○ Material Color Palettes
○ Swatches
Recycler Views
Generalization of the ListView (aka ListView2)
CardView
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!-- Your card content -->
</android.support.v7.widget.CardView>
Toolbar
● Generalization of the ActionBar
o It can be placed anywhere
● … and it offers support for Custom Views
Support Library v7
● Theme.AppCompat
● RecyclerView
● CardView
● Toolbar
● Palette API
Project Volta
● Improve your battery life!
● JobScheduler API
o Start when charging / wifi / unmetered network/
idle / deadline or minimum delay
● Battery Historian
o adb shell dumpsys batterystats
Notifications
● Adapted for Material Design
● Accent Color fills a circle in icon
● Small icon badging
● … expanded views and custom remote views
● MediaStyle Template for media playback
Notifications
● Heads-up notifications
o Floating alerts that can be swiped away
● Lock Screen notifications
o PUBLIC, PRIVATE and SECRET notifications
NotificationVisibility
Notifications metadata
● ...anotate them to prioritize them
● Notification categorizations
o call, message, alarm, social
o EXTRA_PEOPLE (uri or email…)
o when: fullscreenintent, prority,= vibrate/sound
notifications and wear
● What you get on your phone, on your watch
● Or extend: Notification.WearableExtender
Android TV
● Leanback UI
o LEANBACK_LAUNCHER
● @style/Theme.Leanback
Android Auto
● Audio apps
● Messaging apps
Resources
http://android-developers.blogspot.ch/2014/10/implementing-material-design-in-your.html
http://trickyandroid.com/simple-ripple-reveal-elevation-tutorial/
http://developer.android.com/about/versions/android-5.0.html
http://developer.android.com/about/versions/lollipop.html
Thanks!
@seviu
ch.linkedin.com/in/seviu
● Presentation available:o http://goo.gl/hudvPx