Session Code

Windows Phone Multitasking & Live Tiles

Larry LiebermanProduct Manager, Windows Phone DeveloperMicrosoft Corporation

Key takeaways for Windows Phone

Broad set of multitasking features

Balances user experience with phone health

Familiar .NET programming model

Windows Phone Multitasking Block Diagram

Resource Management

Built-in services

3rd-party services

Alarms & Reminder

s

File Transfers

Background Audio

Periodic Execution

Fast A

pp

Sw

itchin

g

Harmony

UX

Health Battery-Friendly

Network-Aware

Hardened Services

Delightful and Responsive UX

Never Regret Installing Apps

Integrated Experiences

Multitasking and Phone Health

Monitor resource usage

Align with system and user activity

Balance foreground and background

Processing on demand

New OS services

demo

Fast Application Switching

Fast App Switching Support

Keeps user in control

Compatible with 7.0

apps

Suspends application

threads

Load or refresh state*

Compileand test

for Mango

Reattach resources*

* Only if needed.

OS

Application Lifecycle

Save state but do not discard it

Reload / refresh state only if needed

Application is resident in memory; system detaches resources and pauses threads

Tombstoned

DeactivatedDormant

RunningActivated

Demo

Alarms and Reminders

Alarms and Reminders - Overview

Same UX as built-in alarms and reminders

Deep link back into the application

Efficient implementation based on OS services

Demo

Background Transfer Service

Background Transfer Service - Limits

1 2 3 4 5

Background Transfer Service - Limits

5 MB

20 MB

20 MB

100 MB

Unlimited

Background Transfer Service - Overview

Balances functionality with phone health and user costSimplifies download management in appsEfficient implementation based on OS services

Persists across reboots

Demo

Live Tiles

Live Tiles - Overview

Pin multiple tiles to Start

New flip animation with additional contentUpdate three ways: push, schedule, or local API

demo

Background Agents

End-to-End Architecture

System Service

sISO StoreCloud

DifferentProcesses

Logic

UX

MyApp.dll

Application OS

Logic

MyAppAgent.dll

Single App

DeveloperMyApp Solution

MyApp Project

MyAppAgent Project

WMAppManifest

code

Background Agents

Background Agents – Basic Functionality

Allowed Restricted

Tile updatesToastsLocationNetworkingStorageMost framework APIs

MicrophoneCameraSensorsGraphicsAudioAll XNA libraries

Background Agents – Two Flavors

Periodic AgentResource-Intensive Agent

Runs every 30 minutes

Any network

connection

Runs for 25 seconds

Used for location, data

sync, etc.

Runs on external power

Non-cell network

connection

Runs for 10 mins,

recurring

Used for daily tasks,

large data syncs, etc.

...when battery level is > 20% and battery saver is not on ...when battery level is > 90%

Background Agents - Overview

Separate resource-constrained process

Managed by the OS to maintain phone health

User stays in control via system settings

Familiar .NET programming model

demo

Background Audio

Background Audio Architecture

Zune Playbac

kISO StoreCloud

UX

MusicApp.dll

LogicMusicAgent.d

ll

20/30

West End Girls Pet Shop Boys

All playback logic lives in the agent!

code

Background Audio

Background Audio Playback - Overview

HTML 5 Audio Playback in Internet ExplorerTrack-based playback for standard formatsBuffer-based playback for custom formatsGuaranteed resources for continuous playback

Recap

Broad set of multitasking features

Balances user experience with phone health

Familiar .NET programming model

Health

UX

Related Content

Resources

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Contents

Slide Title

First levelSecond level

Third level Fourth level

Fifth level

PowerPoint Guidelines

Font, size, and color for text have been formatted for you in the Slide MasterUse the color palette shown belowHyperlink color: www.microsoft.com

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Bar Chart Example

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Series 1Series 2Series 3

demo

Demo Title

Name

video

Video Title

announcement

Announcement Title

Code Sample

Get-Process –computername srv1

class TechEdProgram{

public static void Main(){

System.Console.WriteLine("Hello, Tech·Ed!");}

}