Android Lollipop: The developer's perspective

Android 5.0 Lollipop

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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

New APIs

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

sebastian@iphonso.com

ch.linkedin.com/in/seviu

● Presentation available:o http://goo.gl/hudvPx