The first BlackBerry Application of The j2-midlet developer

For any development, a helloworld introduction is essential. For mobile application development, j2's is also a widely accepted platform technology. First, we use helloworld developed by j2on Blackberry as an example, to start our Blackberry Application Development journey

The first BlackBerry Application of The j2-midlet developer

1. Download and install eclipse and blackberry Java Plug-in for eclipse

The eclipse version used in this article is: Eclipse SDK 3.5.1

The Blackberry Java Plug-in for eclipse version used in this article is: V1.1 (: http://na.blackberry.com/eng/developers/devbetasoftware/javaplugin.jsp)

2. Start eclipse, file à New à other, and select BlackBerry project:

 

 

 

Press finish.

3. Create a package in the src directory of the demo project: Demo

 

4. Create a MIDlet In Demo:

Note:

A) You need to install eclipseme -- Installing via the eclipseme Update site http://eclipseme.org/docs/installEclipseME.html#step2b

B) Another wizard for mobile tools for Java Plug-in for j2's development plug-in cannot create MIDlet www.eclipse.org/dsdp/mtj In the BlackBerry project.

 

 

Press finish.

5. Enter the MIDlet code, for example:

Package demo;

Import javax. microedition. lcdui. Command;

Import javax. microedition. lcdui. display;

Import javax. microedition. lcdui. form;

Import javax. microedition. MIDlet. MIDlet;

Import javax. microedition. MIDlet. midletstatechangeexception;

Public class midlet1 extends MIDlet {

Private form FRM = new form ("Please choose ");

Private display DIS;

Private command cmddel = new command ("edit", command. screen, 1 );

Private command cmdedit = new command ("delete", command. screen, 1 );

Private command cmdexit = new command ("exit", command. screen, 1 );

Private command cmdback = new command ("return", command. Back, 1 );

Public midlet1 (){

}

Protected void Startapp () throws midletstatechangeexception {

Dis = display. getdisplay (this );

Dis. setcurrent (FRM );

FRM. addcommand (mongodel );

FRM. addcommand (cmdedit );

FRM. addcommand (cmdexit );

FRM. addcommand (cmdback );

}

Protected void pauseapp (){

}

Protected void destroyapp (Boolean arg0) throws midletstatechangeexception {

}

}

6. Modify blackberry_app_descriptor.xml in the Red Circle:

Application Type: MIDlet

Name of main MIDlet class: Demo. midlet1 (note that you cannot directly write midlet1)

Application icon: add the icon of the application on the BlackBerry home screen

 

7. Run in the simulator:

 

The running result is as follows:

 

 

8. The demo. COD file is used to install programs on the BlackBerry mobile phone in the eclipse workspace directory.

 

 

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/salvatore_zhang/archive/2010/05/06/5564186.aspx