Java™ 2 Micro Edition Application Development

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, ...