June 2002
Intermediate to advanced
504 pages
10h 10m
English
Content preview from Java™ 2 Micro Edition Application DevelopmentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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High-Level API
Now that you know the basics of the MIDlet's life cycle and general display model, we can start to look deeper into the lcdui package. We will start with another subclass of Screen: Alert. Then we will discuss some simple Items like StringItem and ImageItem. We will explain the use of more advanced Items such as TextField and ChoiceGroup by creating a simple TeleTransfer example application. As we introduce new MIDP high-level UI capabilities like other Screen subclasses, we will extend the TeleTransfer sample step by step.
Alerts
You already know the Form class from the first example. The simplest subclass of Screen is Alert. Alert provides a mechanism to show a dialog for a limited period of time. It consists of a label, text, ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.