Android开发实现的简单媒体播放器功能示例

本文实例讲述了android开发实现的简单媒体播放器功能。分享给大家供大家参考，具体如下：

一、概述：

因为播放视频需要很大的内存，所以必须使用surfaceview ，

surfaceview 里实现了双缓冲的功能，

二、全部代码：

/**
 * @描述     使用surfaceview 创建视频
 * @项目名称   app_basic
 * @包名     com.example.basic.media
 * @类名     mediaplayeractivity
 * @author   chenlin
 * @date    2013-3-25 上午7:36:32
 * @version   1.0
 */
public class mediaplayeractivity extends baseactivity {
  private mediaplayer mplayer;
  private button mbtnplay;
  private button mbtnpause;
  private surfaceview msurfaceview;
  private int mcurrentposition;
  private seekbar seekbar;
  private boolean isplaying;
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    msurfaceview = new surfaceview(this);
    seekbar = new seekbar(this);
    seekbar.setonseekbarchangelistener(new onseekbarchangelistener() {
      @override
      public void onstoptrackingtouch(seekbar seekbar) {
        int progress = seekbar.getprogress();
        if (mplayer != null && isplaying) {
          mplayer.seekto(progress);
        }
      }
      @override
      public void onstarttrackingtouch(seekbar seekbar) {
        // todo auto-generated method stub
      }
      @override
      public void onprogresschanged(seekbar seekbar, int progress, boolean fromuser) {
        // todo auto-generated method stub
      }
    });
    msurfaceview.getholder().settype(surfaceholder.surface_type_push_buffers);
    msurfaceview.getholder().addcallback(new callback() {
      @override
      public void surfacedestroyed(surfaceholder holder) {
        if (mplayer!= null && mplayer.isplaying()) {
          mcurrentposition = mplayer.getcurrentposition();
          stop();
        }
      }
      @override
      public void surfacecreated(surfaceholder holder) {
        if (mcurrentposition > 0) {
          play(mcurrentposition);
        }
      }
      @override
      public void surfacechanged(surfaceholder holder, int format, int width, int height) {
        // todo auto-generated method stub
      }
    });
  }
  public void play(final int currentposition){
    try {
      mplayer = new mediaplayer();
      mplayer.setaudiostreamtype(audiomanager.stream_music);
      uri myuri = uri.fromfile(new file("sdcard/mp3/1.mp3"));
      mplayer.setdatasource(getapplicationcontext(), myuri);
      mplayer.setlooping(true);
      mplayer.setdisplay(msurfaceview.getholder());
      mplayer.prepareasync();
      //mplayer.prepare();
      mbtnplay.setenabled(false);
      mplayer.setoncompletionlistener(new oncompletionlistener() {
        @override
        public void oncompletion(mediaplayer mp) {
          mbtnplay.setenabled(true);
          mplayer.release();
        }
      });
      mplayer.setonerrorlistener(new onerrorlistener() {
        @override
        public boolean onerror(mediaplayer mp, int what, int extra) {
          mbtnplay.setenabled(true);
          mplayer.release();
          isplaying = false;
          return false;
        }
      });
      mplayer.setonpreparedlistener(new onpreparedlistener() {
        public void onprepared(mediaplayer mp) {
          mplayer.start();
          mplayer.seekto(currentposition);
          seekbar.setmax(mplayer.getduration());
          new thread(new runnable() {
            @override
            public void run() {
              isplaying = true;
              while(isplaying){
                seekbar.setprogress(mplayer.getcurrentposition());
                systemclock.sleep(500);
              }
            }
          });
        }
      });
    } catch (exception e) {
      e.printstacktrace();
    }
  }
  public void pause(){
    if ("接续".equals(mbtnpause.gettext().tostring())) {
      mbtnpause.settext("暂停");
      mplayer.start();
      return;
    }
    if (mplayer != null && mplayer.isplaying()) {
      mplayer.pause();
      mbtnpause.settext("继续");
      return;
    }
  }
  public void reset(){
    if (mplayer != null && mplayer.isplaying()) {
      mplayer.seekto(0);
      return;
    }
    play(0);
  }
  public void stop(){
    if (mplayer != null && mplayer.isplaying()) {
      mplayer.stop();
      mplayer.release();
      mplayer = null;
      mbtnplay.setenabled(true);
      isplaying = false;
    }
  }
}

更多关于android相关内容感兴趣的读者可查看本站专题：《android多媒体操作技巧汇总(音频,视频,录音等)》、《android开发入门与进阶教程》、《android视图view技巧总结》、《android编程之activity操作技巧总结》、《android文件操作技巧汇总》、《android资源操作技巧汇总》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。