audiorecord.java

jBuilderX无线应用开发源代码

import javax.microedition.midlet.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import javax.microedition.lcdui.*;
import java.io.*;

public class AudioRecord extends MIDlet implements CommandListener{
	private Display   display;
	private Form form;
	//程序中用到的命令
    private final static Command start = new Command("Start", Command.ITEM, 1);
	private final static Command stop = new Command("Stop", Command.ITEM, 1);
	private final static Command exit = new Command("Exit", Command.EXIT, 1);

	private Player recorder = null, player = null;
	private RecordControl rc = null;

	public AudioRecord(){
		//创建程序的界面并设置命令
		form=new Form("Audio Record");
		form.addCommand(start);
		form.addCommand(stop);
		form.addCommand(exit);
		form.setCommandListener(this);
	}

    public void startApp() {
		display  = Display.getDisplay(this);	
		display.setCurrent(form);
		
    }

    public void pauseApp() {
	}

    public void destroyApp(boolean unconditional) {
    }
	
	public void commandAction(Command c, Displayable s){
		if(c == start) {
			try{  
				//开始录音
				if(recorder == null){
					//创建用于录音的Player
					recorder = Manager.createPlayer("capture://audio");
					recorder.realize();
					//得到控制录音过程的RecordControl
					rc = (RecordControl)recorder.getControl("RecordControl");
					//设置录音输出位置
					rc.setRecordLocation("file:/audio.wav");
					//开始录音
					rc.startRecord();
					recorder.start();
				}	
			}
			catch(MediaException me){
				me.printStackTrace();
			}
			catch(java.io.IOException ioe){
				ioe.printStackTrace();
			}
		}
		else if(c == stop) {
			//停止录音
			try{ 
				if(recorder!=null){
					recorder.stop();
					rc.stopRecord();
					rc.commit();
					recorder.close();
					recorder=null;
				}
			}
			catch(MediaException e){
				e.printStackTrace();
			}
			catch(java.io.IOException ioe){
				ioe.printStackTrace();
			}
		}
		else if(c == exit) {
			//释放资源、退出程序
			if(recorder!=null){
				try{
					rc.commit();
					recorder.close();
				}
				catch(java.io.IOException ioe){
					ioe.printStackTrace();
				}
			}
			if(player!=null){
				player.close();
			}
			destroyApp(false);
			notifyDestroyed();
		}
    }
}