Java mobile 移动应用开发

Thoughtworks

Java Based Mobile Development

ZheWang

zwang@thoughtworks.com

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Index

• Overview of Mobile Development

• Diff platforms & various dev languages

• Why Java

• What Java can do

• Where to dev

• How to dev

• Key Points

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Mobile Development-Diff from PC-

• Con– Communication– Mobile– Keep live– Embedded Systems (GPS, RFID and etc)– Value Added Service (E-ticket)

• Pos– Battery– Screen– Process– Storage

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Mobile Development

• Simon; it was designed by IBM in 1992

• Smartphone Ericsson 1997

• powerful processors, abundant memory, larger screens, and open operating systems

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Mobile Development Cont.

According to Gartner in their report dated November 2010, totalsmartphone sales doubled in one year and now smartphonesrepresent 19.3 percent of total mobile phone sales. Over late 2009and 2010 Android's smartphone market share has increased veryrapidly [Gartner, 2010]

• 2010 Q3 PC – 88.3 million (7.6%)

• 2010 Q3 Smartphone – 77 million (78%)

• Apple Store about 10 billion download

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Diff platforms & various dev languages

Year Platform Support

2000 Symbian Ericsson

2001 WinCE Microsoft

2002 PalmOS* Palm

2002 Blackberry RIM (32m)

2007 iOS Apple

2008 Android Google

2010** Bada Sumsung

2010 Symbian^3 OS Nokia

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Diff platforms & various dev languages

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Why Java

• Do you believe?

Share of worldwide 2010 Q3 smartphone sales to end users by operating system, according to Gartner.

iOS

• Object-C

Windows Mobile

• C, C++

• Java ME

Android

• Java (C, C++ & VB)

Blackberry

• Java

Symbian

• C++

• Java ME

Bada

• Java*

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What Java can do

• Java App

–Opera Mini– Google Map

– Gmail for Mobile

– eBuddy IM

– Snaptu

– Skype Lite

– …

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What Java can do

• Java App

– Opera Mini

–Google Map– Gmail for Mobile

– eBuddy IM

– Snaptu

– Skype Lite

– …

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What Java can do

• Java App

– Opera Mini

–Google Map– Gmail for Mobile

– eBuddy IM

– Snaptu

– Skype Lite

– …

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What Java can do

• Java App

– Opera Mini

– Google Map

–Gmail for Mobile– eBuddy IM

– Snaptu

– Skype Lite

– …

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What Java can do

• Java App

– Opera Mini

– Google Map

– Gmail for Mobile

–eBuddy IM– Snaptu

– Skype Lite

– …

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What Java can do

• Java App

– Opera Mini

– Google Map

– Gmail for Mobile

–eBuddy IM

–Snaptu– Skype Lite

– …

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What Java can do

• Java App

– Opera Mini

– Google Map

– Gmail for Mobile

–eBuddy IM

– Snaptu

–Skype Lite– …

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What Java can do (2)

• How about Game– Iron Man 2

– The Team-A

– Prison Tycoon

– SimCity Deluxe

– Guitar Hero World Tour

– FIFA 2010: South Africa World Cup

– Robin Hood: The Movie Game

– Prince of Persia: The Forgotten Sands

– FaceBreaker

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Where to dev - plfm

• Blackberry

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Where to dev - plfm

• Android

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Where to dev - tools

• SDK-Toolkit

• IDE

• Emulator

• Management Tools

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Where to dev - tools

• Sun Wireless Toolkit

• Netbean

• Eclipse*

• IntelliJ*

• …

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How to dev

• Proposal (UI-UX)

– UI focused app

• Paper based proposal

• Photoshops based proposal

– Service focused app

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How to dev

• Design/Framework – BDD/TDD

REA_Project

REA_Domain

REA_Unit_Test

Focus on UI and Event handling

Focus on domain logic & status

Focus on domain unit test

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How to dev

• continuous integration (see REA hudsonserv)

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How to dev

• Agile process (see Pivatol tracker)

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Experiences

• Key Points– Concurrency Programming

– Battery Consuming

– Geo Location

– UI and UX

– Binary Code Analysis (text, audio&video)

– Network (HTTP, HTTPS, RTP and etc)

– Broad wide (Network, Edge/Wifi/3G/GPRS)

– Service Provider

– Multi-Platform Knowledge

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Concurrency Programming

• Java Concurrency Programming

– Basic

– Concurrency package

– RTSJ (real-time)

• Whether it is correct or not

• Testing and Formal method

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Battery Consuming

• Threads

• IO Operation

• Schedules (Avenace website)

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Geo Location

• Example (GPS Preliminary Research)

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Blackberry 9500( around 10 mins cycling)

• GPS Setting• Sampling Interval (30 secs)• Sampling Duration (15 secs)

• Criteria• H Accuracy (2 meters)• V Accuracy (Not applied)• P Consumption (Medium)• Cost (true)

• 16 GPS• 5 Heartbeat

Succ Fail

4 2

5 1

3 3

3 3

0 6

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However…8900 ｜ 9530 ｜ 8310

Obtain GPS Data at the period

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Criteria Comparison Horizontal and Vertical Accuracy

-

6059

Succ vs Fail with HVA 10

GPS Fix Succ GPS Fix Fail

5360

Succ vs. Fail with HVA 2

GPS Fix Succ GPS Fix Fail

63

45

Succ vs. Fail with HVA 15

GPS Fix Succ GPS Fix Fail

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UI and UX

• Layout (resolution, keyboard, gravity and etc.)

• Example (REA UX)

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Binary Code Analysis (audio, video

• Example (WBXML, Audio)

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Network (HTTP, HTTPS, RTP and etc)

• Example (How network affect connection)

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Broad wide (Network, Edge/Wifi/3G/GPRS)

• Example (technologies selection)

– Linear AU (mono, stereo)

– GSM

– ARM

– MP3

– MIDI

– WAV

– …

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Service Provider

• Example (Blackberry Big Picture)

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Thanks