billday's Blog
Wireless Recap, August 2004
August highlights are available by clicking here. Submit your feedback and comments via the Comments link
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Wireless Recap, July 2004
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Wireless Recap, April-June 2004
I promised monthly wireless recaps back in March, but shortly after that first post I changed jobs and have been falling short of that promise ever since.
Here's the beginning of my attempt to make for up that shortcoming: I've posted an April-June recap to my site and July and August recaps are forthcoming.
PS Please post any feedback or comments here.
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JavaOne 2004 Recap
I've posted a JavaOne 2004 recap to my site as promised. Please click here for a complete end-of-week conference summary including daily reports and photos from wireless sessions and events around the conference. Enjoy!
PS Please post any feedback or comments here.
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JavaOne Plans
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Joining Nokia
FYI, I have accepted a new position at Nokia running developer technical services and consultation for the Americas. More details are available from my personal blog.
I intend to continue blogging wireless Java related tidbits on java.net as time permits, including resuming my monthly wireless highlights entries in the not too distant future.
And if you're going to be at JavaOne, please consider stopping by one of my sessions or the Nokia booth to say hello and let me know what suggestions you have for Forum Nokia, the "J2ME Archive", and BillDay.com.
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Wireless Recap, March 2004
Today I'm kicking off a new regular feature in my blog. Each month I'll link to items from my java.net and BillDay.com blogs that I think every Java developer, or at least every wireless Java developer, should know from the preceding month's wireless and mobility related news, presentations, and technical information.
Diving right in, top wireless stories and resources from March 2004 included:
- The Java Verified program ramped up and discussion began on java.net
- Nokia, Motorola, and Sony Ericsson announced a number of new devices at CeBIT, CTIA, and elsewhere. Among the more interesting J2ME handsets: A music oriented Motorola Linux phone capable of using 1GB SD memory cards and Nokia's first megapixel cellcam, the 7610.
- In late March at its Annual General Meeting, Nokia promised 40 new handsets in 2004. Some analysts theorized the timing of this announcement was in response to criticism that Nokia's CeBIT announcements were a bit weak.
- From the research front: Philips announced a camera lens that focuses using fluids, similar to a human eye. Watch for variable length focus lenses to start appearing in cellcams in the not too distant future.
- From the mobile OS front: Nokia anounced several pieces of Series 60 related news including Series60.com and LG Electronics' licensing of Series 60 for upcoming LG Symbian phones. I also linked to several Series 60 resources that should prove helpful for many Symbian/Series 60 users.
- I posted slides for my "Migrating Wireless Applications to MIDP 2.0, WMA, and MMA" talk. Watch for an announcement on java.net once the webcast of this presentation is available.
- Answered a reader question on OTA MIDlet installation on PalmOS devices. Now that palmOne has officially released its J2ME implementation for end users, hopefully we'll see a continued increase in Java development for Palm powered smartphones and PDAs.
- Forbes.com carried a Reuters article on Global camera phone sales in 2003 thats worth reading, both for the obvious and the not-so-obvious-but-more-interesting stats.
Ending this recap with news from the "fun stuff" front: This looks to be the year of wireless baseball. Major League stadiums are starting to go WiFi, and in honor of a major league deal between MLB.com and Sun, free "Take Me Out to the Ballgame" ringtones are available for the taking. Play ball, wireless fans!
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OTA MIDlet Installation on PalmOS Devices
Following up on my earlier entry on Java for PalmOS Devices, Mel Seyle wrote me to ask:
Does this mean that I can now directly download MIDlets to my Palm Tungsten and run them? I used to have to convert my Java programs to Palm PRC files before uploading them on my Palm Vx to run under the KVM.
I don't have a Java-enabled Tungsten myself, but in preparing a follow-up to my earlier entry (Java for PalmOS Devices, Act 2), I came across some information that might help.
Ken Walker's comments in response to Russ Beattie's post about PalmSource getting the Java religion indicate that now that PalmOne and PalmSource are both shipping an integrated J2ME implementation, things are a lot simpler for J2ME app deployment to PalmOS devices:
I've OTA'd lots of MIDlets by browsing using WebPro to the JAD file. It hooks up to the Exchange Manager so after the JAD is downloaded the MIDlet HQ is invoked, jar downloaded, converted to a PRC and is good to run.
So, Mel, simply point your Tungsten at a MIDlet's JAD file and the runtime will take care of the conversion to PRC for you. Excellent news for both Java developers and Palm users everywhere!
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Free J2ME Certification Exam
Sun is developing a J2ME certification to complement the other Java technology certifications. The exam is now in the "beta" phase, with Sun looking for candidates to take the exam and give feedback on the questions.
The good news: It's free. The really good news: If you pass, you'll be certified!
Learn more about the technologies covered by the exam by reading through the Certification Objectives. Registration is limited but has been extended through early March. Click here for details.
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MIDP Push Using SMS
I receive quite a few questions related to my J2ME Archive and wireless development blogs. From time to time I'll select one that's particularly pertinent to highlight here.
For this tip, Ellick Chan (working pervasive education and integrating mobile devices into Gaia) asked:
How can I use GSM's SMS capabilitiy to deliver push notifications to MIDlets?
The MIDP 2.0 spec allows you to push notifications to your MIDlets using any communication protocol supported by both the network and the MIDP-enabled device. HTTP, SMS, sockets, and/or other protocols may be supported, depending on the network you're using and the device to which your notificiation is directed. You should read through the article "The MIDP 2.0 Push Registry" for a technical overview of how push works, especially from the MIDlet client perspective.
Whichever network(s) you're application will be using, you need to find out what protocols they allow inbound to handsets. At the least, most GSM carriers will allow SMS (since they use SMS for short text messaging). Assuming your network does support SMS, from the server part of your application you would need to generate an SMS message directed to the port you bound your MIDlet to in its static or dynamic push registry settings. Assuming the network passes the SMS as expected, your MIDlet should be awakened when the SMS arrives in the handset.
Note carefully: You need to be sure you direct your incoming message to a logical port. For more information on how your server side bits need to address this port number, refer to the "GSM SMS Adapter" part of the WMA 1.1 specification.
Carrier specific developer programs should be able to provide the details on their support for sending SMS messages into their networks. Visit your carrier's developer Web site for more information (refer to the "Carriers" section of my J2ME Archive for some links to example carrier developer sites).
To learn more about the MIDlet side of things (receiving the port specific SMS), refer to the WMA section of my presentation "Developing Wireless Applications Using MIDP 2.0, WMA, and MMA" (a webcast of this presentation is available from JavaOne Online by clicking here).
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Comments
Related to trhe J2mE Exam
by minal_singh - 2009-08-26 10:08
Can u confim whether I can register for this exam or not because these links are not working now. I am interested in giving the exam.