alerttypedemo.java

J2ME手机游戏开发技术详解,适合初学者阅读使用

import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class AlertTypeDemo
    extends MIDlet implements CommandListener{
    private Command CMD_EXIT=new Command("Exit",Command.EXIT,1);
    private Command CMD_INFO=new Command("INFO",Command.SCREEN,2);
    private Command CMD_WARN=new Command("WARN",Command.SCREEN,3);
    private Command CMD_ERROR=new Command("ERROR",Command.SCREEN,4);
    private Command CMD_ALARM=new Command("ALARM",Command.SCREEN,5);
    private Command CMD_CONF=new Command("CONFIRMATION",Command.SCREEN,6);
    private Display display;
    private Form mainForm;
    private AlertType alertType;
    public AlertTypeDemo() {
    	display = Display.getDisplay(this);
        alertType = AlertType.ALARM;
        mainForm = new Form("AlertType演示播放声音");
        mainForm.addCommand(CMD_EXIT);
        mainForm.addCommand(CMD_INFO);
        mainForm.addCommand(CMD_WARN);
        mainForm.addCommand(CMD_ERROR);
        mainForm.addCommand(CMD_ALARM);
        mainForm.addCommand(CMD_CONF);
        mainForm.setCommandListener(this);   
    }
    protected void startApp() {
        display.setCurrent(mainForm);
    }
    protected void destroyApp(boolean unconditional) {
    }
    protected void pauseApp() {
    }
    public void commandAction(Command c, Displayable s) {
	int priority = c.getPriority(); 
	switch(priority){
	case 2:alertType = AlertType.INFO;break;
	case 3:alertType = AlertType.WARNING;break;
	case 4:alertType = AlertType.ERROR;break;
	case 5:alertType = AlertType.ALARM;break;
	case 6:	alertType = AlertType.CONFIRMATION;break;
	}
	if(alertType.playSound(display)){
	    	mainForm.append("声音已经播放\n");
	}
	if (c == CMD_EXIT){
	    destroyApp(false);
	    notifyDestroyed();	
        }
    }
}