tickerdemo.java

J2ME常用控件使用的例子 Eclipse写的 练手用的

package ticker;

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.lcdui.*;

public class TickerDemo extends MIDlet implements CommandListener {

	private Display display;
	private Ticker ticker;
	private TextBox textBox1;
	private TextBox textBox2;
	private Command cmdExit = new Command("退出",Command.SCREEN,1);
	private Command cmdNext = new Command("下一页", Command.SCREEN ,1);
	public TickerDemo() {
		// TODO 自动生成构造函数存根
		display = Display.getDisplay(this);
		ticker = new Ticker("A ticker chared by two screens.");
		textBox1 = new TextBox("Ticker Demo","屏幕1，请按下\"下一页\"软键，显示屏幕2！",50,0);
		textBox1.setTicker(ticker);
		textBox1.addCommand(cmdNext);
		textBox1.addCommand(cmdExit);
		textBox1.setCommandListener(this);
		textBox2 = new TextBox("Ticker Demo","屏幕2，请按下\"下一页\"软键，显示屏幕1！",50,0);
		textBox2.setTicker(ticker);
		textBox2.addCommand(cmdNext);
		textBox2.addCommand(cmdExit);
		textBox2.setCommandListener(this);
	}

	protected void destroyApp(boolean arg0){
		// TODO 自动生成方法存根

	}

	protected void pauseApp() {
		// TODO 自动生成方法存根

	}

	protected void startApp() throws MIDletStateChangeException {
		// TODO 自动生成方法存根
		display.setCurrent(textBox1);
	}
	
	public void commandAction(Command c, Displayable d){
		if(c == cmdNext){
			if(textBox1.isShown()){
				display.setCurrent(textBox2);
			}else{
				display.setCurrent(textBox1);
			}
		}else if(c == cmdExit){
			destroyApp(false);
			notifyDestroyed();
		}
		
	}

}