Developing integrated mobile web applications
Download
1 / 23

Developing Integrated Mobile Web Applications - PowerPoint PPT Presentation


  • 242 Views
  • Uploaded on

Developing Integrated Mobile Web Applications. Jeff Foust jfoust@alum.mit.edu http://www.jfoust.com/web2001. Purpose. Think about the challenges of developing mobile web apps A look at one approach for mobile web apps See samples of approach you can use today. Outline.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Developing Integrated Mobile Web Applications' - chaela


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Developing integrated mobile web applications

Developing IntegratedMobile Web Applications

Jeff Foust

jfoust@alum.mit.edu

http://www.jfoust.com/web2001


Purpose
Purpose

  • Think about the challenges of developing mobile web apps

  • A look at one approach for mobile web apps

  • See samples of approach you can use today


Outline
Outline

  • The challenges of mobile applications

  • One approach for developing mobile applications

  • One example: WAP

  • Another example: PalmOS


The challenges of mobile applications
The Challenges of Mobile Applications

  • Low bandwidth

  • Small display size

  • Connectivity issues

  • User input issues


Challenge low bandwidth
Challenge:Low Bandwidth

  • PCs access at speeds from 56k to T1 and beyond

  • Wireless devices limited to 19.2k, often less

  • 2.5G and 3G hold promise for the future, but be prepared to wait...


Challenge small displays
Challenge:Small Displays

  • PCs have large displays, resolutions of 800x600 pixels and up

  • Handhelds (PalmOS and PocketPC) from 160x160 to 320x320 pixels

  • WAP phones may offer just a few lines of text


Challenge connectivity
Challenge: Connectivity

  • PCs have little trouble obtaining and maintaining a connection (other than busy signals)

  • Mobile connectivity spotty, with dead zones, limited coverage areas, etc.


Challenge user input
Challenge: User Input

  • PCs offer rich input devices: large keyboards, mice, etc.

  • Mobile devices limited to tiny keypads, stylus input (Graffiti): slower and more error-prone


So what does this mean
So what does this mean?

  • The web browser has emerged as the primary interface between users and applications on PCs

  • This model will not work well on handheld devices given the challenges outlined previously


However
However...

  • Why do we have to treat mobile devices as another platform for running a web browser?

  • These devices are not dumb terminals: they can run a wide range of other apps


Another model
Another model

  • Don’t take information from or display to a browser

  • Instead, transfer information directly to and from the relevant applications:

    • Phone numbers in address book

    • Schedules in date book

    • Et cetera...


Example 1 a wap phone book
Example 1:A WAP phone book

  • One of the canonical examples of a WAP application is looking up a phone number

  • Such apps display phone numbers on the screen…

  • ...but if you’re looking up a number on your phone, you probably want to make a call!


Turning phone numbers into links
Turning phone numbers into links

  • Wireless Telephony Application Interface (WTAI)

    • Extensions to WAP

    • Offers support to initiate phone calls, access internal phone book, etc.

    • Supported by some, but not all, phones


How it works
How it works

<go href=“wtai://wp/mc;6175551234”/>

wtai: URL protocol

wp: a public WTAI library

mc: initiate a phone call (think “mobile call”)

6175551234: the phone number (note no punctuation in the form of ()/-.+ etc.)


Notes
Notes

  • Not supported by all microbrowsers

  • Similar technique exists for entering data into a phone’s internal phone book, but even less widely supported


Example 2 a palmos scheduling app
Example 2: A PalmOS scheduling app

  • Web Clipping Applications (PQAs) are a common way to provide access to web applications for wireless PalmOS devices

  • PQAs can also insert data into applications, with a little effort


What s needed
What’s needed

  • PalmOS device with Web Clipping support:

    • Palm VII/VIIx

    • Palm/Visor with OmniSky modem

    • Palm with Mobile Internet Kit

  • PQA development tools

  • iKnapsack and AddPalmData plugin


How it works1
How it works

  • Web Clipping supports palm and palmcall URL methods:

    • palm: launch specified application

    • palmcall:launch app in background

  • These can’t transfer data into native core apps but can into third-party apps


How it works con t
How it works (con’t)

  • Format data to transfer to iKnapsack

  • iKnapsack then transfers data to appropriate application and displays message


Formatting data for iknapsack an example
Formatting data for iKnapsack: an example

palmcall:iSAK.appl?iPLG=iADD&type=1&desc=Sample Event&date=2001-09-08&start=10:30&end=12:00

This creates an event titled “Sample Event” that starts at 10:30 am on September 8, 2001 and ends at 12:00 pm for entry into the Date Book


Other notes
Other notes

  • iKnapsack supports:

    • Address Book

    • Date Book

    • Memo Pad

    • To Do List

    • Expense

  • No support for third-party applications, though


Other solutions
Other Solutions

  • OmniSky OneTap

    • XML-based solution for two-way data transfer

    • Works on OmniSky network, but with wider range of devices (PPC)

  • Coola

    • Various solutions for sync and wireless information transfer into PalmOS applications


Conclusions
Conclusions

  • Integrating web applications with mobile applications has many benefits

  • It is possible to start doing this now, in rudimentary ways

  • More advanced and sophisticated integration techniques should be possible soon