playmedia7.java

基于J2me的手机软件演示例子

package com.wy.ch12;

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

public class PlayMedia7 extends MIDlet implements CommandListener{
    private Display display;
    private Form f;
    private Command captureCommand;
    private Command playCapturedCommand;
    private Command playCommand;
    private int currentId=-1;
    public PlayMedia7(){
        display = Display.getDisplay(this);
        f = new Form("录音测试");
        captureCommand=new Command("录音", Command.ITEM, 1);
        playCapturedCommand=new Command("播放录制的音乐", Command.ITEM, 1);
        playCommand=new Command("播放音乐", Command.ITEM, 1);
        f.addCommand(captureCommand);
        f.addCommand(playCapturedCommand);
        f.addCommand(playCommand);
        f.setCommandListener(this);
    }
    public void startApp() {
        display.setCurrent(f);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    public void commandAction(Command command, Displayable displayable){
        if(command==captureCommand){
            new CaptureThread(this).start();
        }
        if(command==playCapturedCommand){
            try {
                RecordStore rs=RecordStore.openRecordStore("capture",false);
                
                long modify=rs.getLastModified();
                System.out.println("上次记录存储修改时间是："+modify);
                int nextRecordID=rs.getNextRecordID();
                System.out.println("下一条添加的记录的ID是："+nextRecordID);
                int recordSize=rs.getRecordSize(nextRecordID-1);
                System.out.println("最后一条记录的大小是："+recordSize+"字节");
                int recordNum=rs.getNumRecords();
                System.out.println("记录存储中的记录数量是："+recordNum);
                int size=rs.getSize();
                System.out.println("记录存储占用的空间是："+size+"字节");
                int availSize=rs.getSizeAvailable();
                System.out.println("记录存储可扩展的空间是："+availSize+"字节");
                
                
                InputStream in = null;
                System.out.println("currentId:"+currentId);
                if (currentId!=-1) {
                    in = new ByteArrayInputStream(rs.getRecord(currentId));
                }else{
                    return;
                }
                Player p;
                try {
                    p = Manager.createPlayer(in, "audio/x-wav");
                    p.start();
                } catch (MediaException ex) {
                    System.out.println("失败");
                    return;
                } catch (IOException ex) {
                    System.out.println("失败");
                    return;
                }
                 
                
            } catch (RecordStoreException ex) {
                System.out.println("失败");
                return;
            }
            
        }
        if(command==playCommand){
            try {
                InputStream is = getClass().getResourceAsStream("/test-wav.wav");
                Player p = Manager.createPlayer(is, "audio/X-wav");
                p.start();
            } catch (Exception e){
                System.out.println("失败");
                return;
            }
        }
        
        
    }
    
    public int getCurrentId() {
        return currentId;
    }
    
    public void setCurrentId(int currentId) {
        this.currentId = currentId;
    }
    
    
    
}