simple preview for android l

google I/OPolly chou

Material Design

New theme

New widgets

New APIs

Principles

Material is the metaphor

Bold, graphic, intentional

Motion provides meaning

Theme@android:style/

!

Theme.Material (dark version) !

Theme.Material.Light (light version) !

Theme.Material.Light.DarkActionBar

UI WidgetsRecyclerView

UI WidgetsRecyclerView

UI WidgetsRecyclerView !

notifyItemInserted(int position)

notifyItemRemoved(int position)

http://www.grokkingandroid.com/first-glance-androids-recyclerview/

UI WidgetsCardView

APIsShadows

APIsShadows !

View.setElevation

View.setTranslationZ

APIsAnimations

Touch feedback

Reveal effect

Activity transitions

Curved motion

View state changes

ART - Android Run Time

Runtime environment

Dalvik VM

ART

Dalvik VM 運⾏行⽅方式：bytecode 在每次運⾏行時，都需透過即時編譯器轉換為機器語⾔言

缺點：

執⾏行時間⻑⾧長

電池續航能⼒力差

系統性能差

優點：

安裝時間短

機器語⾔言佔⽤用的儲存空間⼩小

ART運⾏行⽅方式：app在第⼀一次安裝的時候， bytecode 就會 AOT （Ahead-Of-Timeapp）成機器語⾔言，使其成為 local app

缺點：

安裝時間⻑⾧長

機器語⾔言佔⽤用儲存空間⼤大

優點：

執⾏行時間減半

提升電池的續航能⼒力

提升系統的性能

Settings

Dalvik VM vs ART

Notifications

Form & Function

Lock Screen

MetaData

Watch

Form & Function

Notifications

Material theme !

bg - card, shadow

fg - dart text, actions

Notifications

Accent color !

setColor()

fills a circle

Notifications

Small icon badging

have largeIcon

placed on top

Notifications

Custom View

expanded views

else you want

Lock Screen

Public

Private

PublicVersion

Secret

Lock Screen

MetaData

Smart Sorting

Notification.category

Extra People

notification settings

Watch