playmusic.java

J2ME编程

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2006</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

import javax.microedition.media.*;
import javax.microedition.media.control.VolumeControl;//导入音量控制
import javax.microedition.media.control.VideoControl;
import java.io.InputStream;
import java.io.IOException;//导入视频控制


public class playmusic implements PlayerListener{
  private Player player;
  private int i_LEVEL=50;//音量初始值
  private VolumeControl volumeControl; //音量控制对象
  private String URL;
  private boolean b_cycle=false;//循环播放
  InputStream is; //输入流
  /*****************************************************
     <p>功能：构造播放器</p>
     <p>输入：音乐文件路径</p>
    *****************************************************/
  public playmusic(String url) {
    URL = url;
    String type="";
    is=getClass().getResourceAsStream(URL);//从url1获得播放资源的输入流
      try {
        if(URL.endsWith("wav")||URL.endsWith("WAV")){ //如果后缀名为wav
           type = "audio/x-wav";
         }else if(URL.endsWith("mid")||URL.endsWith("MID")){ //如果后缀名为mid
            type = "audio/midi";
         }
        player = Manager.createPlayer(is,type); //管理程序创建一个播放器格式为audio/x-wav
      }
      catch (MediaException ex) {System.out.println(ex.toString());}
      catch (IOException ex) {System.out.println(ex.toString());}
  }
  public void getUrl(String url) {
    URL = url;
  }
  /*****************************************************
     功能：播放声音
     输入：1.无
          2.音量
     输出：无
    *****************************************************/
  public void play(){
    try {
      if(player != null && player.getState() == Player.STARTED) { //
        player.close();
//        player = null;
      }
      player.realize();
      player.start(); //开始播放
      SetVolume(player, i_LEVEL); //设置音量(Player对象，音量大小)
    }catch (MediaException ex) {System.out.println(ex.toString());}
  }
  public void play(int i_LEVEL){
    try {
      player.start(); //开始播放
      SetVolume(player, i_LEVEL); //设置音量(Player对象，音量大小)
    }catch (MediaException ex) {System.out.println(ex.toString());}
  }
  public void play(int i_LEVEL,boolean cycle){
    play(i_LEVEL);
    player.addPlayerListener(this);
    b_cycle = cycle;
  }
  public void playerUpdate(Player player, String string, Object object) {
    if (string == "endOfMedia" && b_cycle==true) {
      try {
        player.start();
      }
      catch (MediaException ex) {}
    }
  }
  /*****************************************************
      功能：停止音乐
   *****************************************************/
  public void stopPlayer(){
    try {
      player.stop();
    }
    catch (MediaException ex) {
    }
  }
  /*****************************************************
     功能：关闭音乐
  *****************************************************/
  public void closeAllPlayer(){
    if(player != null){
      player.close();
      player = null;
    }
  }
  /*****************************************************
     功能：设置音量
     输入：Player对象
          音量级别(0-100)
     输出：无
    *****************************************************/
   private void SetVolume(Player player,int i_Level){
     volumeControl = (VolumeControl)player.getControl("VolumeControl");//获控制设置为音量控制
     volumeControl.setLevel(i_Level);//设置音量
   }
}