Android编程视频播放API之MediaPlayer用法示例

2023-09-26 00:12:18 263

本文实例讲述了Android编程视频播放API之MediaPlayer用法。分享给大家供大家参考，具体如下：

现在项目要做音视频这块功能，这正是我相对比较薄弱的地方，项目中要用到，赶紧抓紧时间学习。前面有一编介绍不错的文章https://www.nhooo.com/article/121881.htm，值得学习。

这里给出一个较为简单的示例：

/**
*AndroidAPIMediaPlayer示例
*
*@description：
*@authorldm
*@date2016-4-20上午10:42:06
*/
publicclassMediaPlayerActivityextendsActivityimplementsOnClickListener{
privateButtonmlocalvideo;
privateButtonmstreamvideo;
privateButtonmlocalaudio;
privateButtonmresourcesaudio;
privatestaticfinalStringMEDIA="media";
privatestaticfinalintLOCAL_AUDIO=1;
privatestaticfinalintRESOURCES_AUDIO=3;
privatestaticfinalintSTREAM_VIDEO=5;
@Override
protectedvoidonCreate(Bundleicicle){
super.onCreate(icicle);
setContentView(R.layout.activity_mediaplayer);
initViewsAndEvents();
}
privatevoidinitViewsAndEvents(){
mlocalaudio=(Button)findViewById(R.id.localaudio);
mresourcesaudio=(Button)findViewById(R.id.resourcesaudio);
mlocalvideo=(Button)findViewById(R.id.localvideo);
mstreamvideo=(Button)findViewById(R.id.streamvideo);
mlocalaudio.setOnClickListener(this);
mresourcesaudio.setOnClickListener(this);
mlocalvideo.setOnClickListener(this);
mstreamvideo.setOnClickListener(this);
}
@Override
publicvoidonClick(Viewv){
switch(v.getId()){
caseR.id.localaudio:
caseR.id.localvideo:
Intentintent=newIntent(MediaPlayerActivity.this.getApplication(),
MediaPlayerDemo_Audio.class);
intent.putExtra(MEDIA,LOCAL_AUDIO);
startActivity(intent);
break;
caseR.id.resourcesaudio:
IntentresIn=newIntent(MediaPlayerActivity.this.getApplication(),
MediaPlayerDemo_Audio.class);
resIn.putExtra(MEDIA,RESOURCES_AUDIO);
startActivity(resIn);
break;
caseR.id.streamvideo:
IntentstreamIn=newIntent(MediaPlayerActivity.this,
MediaPlayerDemo_Video.class);
streamIn.putExtra(MEDIA,STREAM_VIDEO);
startActivity(streamIn);
break;
}
}
}

/**
*OnBufferingUpdateListener可以获取视频音频流的缓冲状态;
*OnCompletionListener播放完毕监听器
*OnPreparedListener准备播放相关接口
*OnVideoSizeChangedListener注册视频大小改变监听器
*SurfaceHolder.Callback：SurfaceView监听callback
*@description：
*@authorldm
*@date2016-4-20上午9:46:16
*/
publicclassMediaPlayer_VideoextendsActivityimplements
OnBufferingUpdateListener,OnCompletionListener,
OnPreparedListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{
privatestaticfinalStringTAG="MediaPlayerDemo";
//Video宽度
privateintmVideoWidth;
//Video高度
privateintmVideoHeight;
//播放器MediaPlayer
privateMediaPlayermMediaPlayer;
//播放界面SurfaceView
privateSurfaceViewmPreview;
//媒体播放器的载体SurfaceHolder
privateSurfaceHolderholder;
//文件路径
privateStringpath;
//Bundle数据对象
privateBundleextras;
privatestaticfinalStringMEDIA="media";
privatestaticfinalintLOCAL_VIDEO=1;
privatestaticfinalintRESOURCES_AUDIO=3;
privatestaticfinalintSTREAM_VIDEO=5;
privatebooleanmIsVideoSizeKnown=false;
privatebooleanmIsVideoReadyToBePlayed=false;
@SuppressWarnings("deprecation")
@Override
publicvoidonCreate(Bundleicicle){
super.onCreate(icicle);
setContentView(R.layout.mediaplayer_2);
mPreview=(SurfaceView)findViewById(R.id.surface);
holder=mPreview.getHolder();
holder.addCallback(this);
//高版本上已经不推荐使用了，如果要兼容低版本（如Android2.3或以下版本）要加上这段代码，不然播放时只会有声音没有图像。
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
extras=getIntent().getExtras();
}
privatevoidplayVideo(IntegerMedia){
doCleanUp();
try{
switch(Media){
caseLOCAL_VIDEO://本地文件（如SD卡）
/*
*TODO:将路径变量设置为本地媒体文件路径。
*/
path="";//这里要填写你所播放音视频的文件路径
if(path==""){
Toast
.makeText(
MediaPlayer_Video.this,
"PleaseeditMediaPlayerDemo_VideoActivity,"
+"andsetthepathvariabletoyourmediafilepath."
+"Yourmediafilemustbestoredonsdcard.",
Toast.LENGTH_LONG).show();
}
break;
caseSTREAM_VIDEO://流文件
/**
*路径变量设置为mp4或3gpp格式的URL。应该使用Http协议。
*媒体播放器只能通过流的形式获取数据，所以需要:
*1。必须是媒体流数据。
*2。必须合理剪辑。
*/
path="";
if(path==""){
//TelltheusertoprovideamediafileURL.
Toast
.makeText(
MediaPlayer_Video.this,
"PleaseeditMediaPlayerDemo_VideoActivity,"
+"andsetthepathvariabletoyourmediafileURL.",
Toast.LENGTH_LONG).show();
}
break;
caseRESOURCES_AUDIO:
//播放放在诸如res/raw文件夹下的资源文件
//直接通过mMediaPlayer=MediaPlayer.create(this,R.raw.test_cbr);
//可以参考APIDemos中AudioFxDemo类文件
break;
}
//创建MediaPlayer对象，传入文件数据并设备监听
mMediaPlayer=newMediaPlayer();
mMediaPlayer.setDataSource(path);
mMediaPlayer.setDisplay(holder);
//使用create()方法创建的MediaPlayer,直接指定了媒体资源,不需要再进行调用prepare()方法;
mMediaPlayer.prepare();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setOnVideoSizeChangedListener(this);
//指定音频流类型
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
}catch(Exceptione){
Log.e(TAG,"error:"+e.getMessage(),e);
}
}
publicvoidonBufferingUpdate(MediaPlayerarg0,intpercent){
Log.d(TAG,"onBufferingUpdatepercent:"+percent);
}
publicvoidonCompletion(MediaPlayerarg0){
Log.d(TAG,"onCompletioncalled");
}
publicvoidonVideoSizeChanged(MediaPlayermp,intwidth,intheight){
Log.v(TAG,"onVideoSizeChangedcalled");
if(width==0||height==0){
Log.e(TAG,"invalidvideowidth("+width+")orheight("+height+")");
return;
}
mIsVideoSizeKnown=true;
mVideoWidth=width;
mVideoHeight=height;
if(mIsVideoReadyToBePlayed&&mIsVideoSizeKnown){
startVideoPlayback();
}
}
publicvoidonPrepared(MediaPlayermediaplayer){
Log.d(TAG,"onPreparedcalled");
mIsVideoReadyToBePlayed=true;
if(mIsVideoReadyToBePlayed&&mIsVideoSizeKnown){
startVideoPlayback();
}
}
publicvoidsurfaceChanged(SurfaceHoldersurfaceholder,inti,intj,intk){
Log.d(TAG,"surfaceChangedcalled");
}
publicvoidsurfaceDestroyed(SurfaceHoldersurfaceholder){
Log.d(TAG,"surfaceDestroyedcalled");
}
publicvoidsurfaceCreated(SurfaceHolderholder){
Log.d(TAG,"surfaceCreatedcalled");
playVideo(extras.getInt(MEDIA));
}
@Override
protectedvoidonPause(){
super.onPause();
releaseMediaPlayer();
doCleanUp();
}
@Override
protectedvoidonDestroy(){
super.onDestroy();
releaseMediaPlayer();
doCleanUp();
}
privatevoidreleaseMediaPlayer(){
if(mMediaPlayer!=null){
mMediaPlayer.release();
mMediaPlayer=null;
}
}
privatevoiddoCleanUp(){
mVideoWidth=0;
mVideoHeight=0;
mIsVideoReadyToBePlayed=false;
mIsVideoSizeKnown=false;
}
privatevoidstartVideoPlayback(){
Log.v(TAG,"startVideoPlayback");
holder.setFixedSize(mVideoWidth,mVideoHeight);
mMediaPlayer.start();
}
}

布局文件activity_mediaplayer

布局文件activity_mediaplayer_video

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数据库操作技巧总结》、《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。

Android编程视频播放API之MediaPlayer用法示例

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