package com.j2medev.chapter7;

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

public class AudioMIDlet extends MIDlet implements CommandListener{
    
    private Display display = null;
    private Form main = null;
    private AudioPlayer player = null;
    private Command exitCommand = new Command("Exit",Command.EXIT,1);
    private Command stopCommand = new Command("stop",Command.OK,2);
    private Command startCommand = new Command("record",Command.OK,1);
    private Command playCommand = new Command("Play",Command.OK,1);
    
    public void startApp() {
        if(display == null){
            display = Display.getDisplay(this);
            main = new Form("Audio Record");
            main.append("Press record to start record your audio");
            main.addCommand(exitCommand);
            main.addCommand(startCommand);
            main.setCommandListener(this);
        }
        display.setCurrent(main);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
        if(player != null)
            player.release();
    }
    
    public void setCurrent(Displayable displayable){
        display.setCurrent(displayable);
    }
    public void commandAction(Command command, Displayable displayable) {
        if(command == exitCommand){
            destroyApp(false);
            notifyDestroyed();
        }else if(command == startCommand){
            main.deleteAll();
            main.append("Press stop to stop the record");
            main.addCommand(stopCommand);
            main.removeCommand(startCommand);
            //開始錄音
            if(player == null){
                player = new AudioPlayer(this);
            }
            player.startRecord();
        }else if(command == stopCommand){
            //停止錄音
            main.deleteAll();
            main.append("press play to listen your voice");
            main.removeCommand(stopCommand);
            main.addCommand(playCommand);
            player.stopRecord();
        }else if(command == playCommand){
            //播放錄音
            main.removeCommand(playCommand);
            player.playRecord();
        }
    }
}