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
*@authorchenlin
*@date2013-3-25上午7:36:32
*@version1.0
*/
publicclassMediaPlayerActivityextendsBaseActivity{
privateMediaPlayermPlayer;
privateButtonmBtnPlay;
privateButtonmBtnPause;
privateSurfaceViewmSurfaceView;
privateintmCurrentPosition;
privateSeekBarseekBar;
privatebooleanisPlaying;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
mSurfaceView=newSurfaceView(this);
seekBar=newSeekBar(this);
seekBar.setOnSeekBarChangeListener(newOnSeekBarChangeListener(){
@Override
publicvoidonStopTrackingTouch(SeekBarseekBar){
intprogress=seekBar.getProgress();
if(mPlayer!=null&&isPlaying){
mPlayer.seekTo(progress);
}
}
@Override
publicvoidonStartTrackingTouch(SeekBarseekBar){
//TODOAuto-generatedmethodstub
}
@Override
publicvoidonProgressChanged(SeekBarseekBar,intprogress,booleanfromUser){
//TODOAuto-generatedmethodstub
}
});
mSurfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceView.getHolder().addCallback(newCallback(){
@Override
publicvoidsurfaceDestroyed(SurfaceHolderholder){
if(mPlayer!=null&&mPlayer.isPlaying()){
mCurrentPosition=mPlayer.getCurrentPosition();
stop();
}
}
@Override
publicvoidsurfaceCreated(SurfaceHolderholder){
if(mCurrentPosition>0){
play(mCurrentPosition);
}
}
@Override
publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth,intheight){
//TODOAuto-generatedmethodstub
}
});
}
publicvoidplay(finalintcurrentPosition){
try{
mPlayer=newMediaPlayer();
mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
UrimyUri=Uri.fromFile(newFile("sdcard/mp3/1.mp3"));
mPlayer.setDataSource(getApplicationContext(),myUri);
mPlayer.setLooping(true);
mPlayer.setDisplay(mSurfaceView.getHolder());
mPlayer.prepareAsync();
//mPlayer.prepare();
mBtnPlay.setEnabled(false);
mPlayer.setOnCompletionListener(newOnCompletionListener(){
@Override
publicvoidonCompletion(MediaPlayermp){
mBtnPlay.setEnabled(true);
mPlayer.release();
}
});
mPlayer.setOnErrorListener(newOnErrorListener(){
@Override
publicbooleanonError(MediaPlayermp,intwhat,intextra){
mBtnPlay.setEnabled(true);
mPlayer.release();
isPlaying=false;
returnfalse;
}
});
mPlayer.setOnPreparedListener(newOnPreparedListener(){
publicvoidonPrepared(MediaPlayermp){
mPlayer.start();
mPlayer.seekTo(currentPosition);
seekBar.setMax(mPlayer.getDuration());
newThread(newRunnable(){
@Override
publicvoidrun(){
isPlaying=true;
while(isPlaying){
seekBar.setProgress(mPlayer.getCurrentPosition());
SystemClock.sleep(500);
}
}
});
}
});
}catch(Exceptione){
e.printStackTrace();
}
}
publicvoidpause(){
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;
}
}
publicvoidreset(){
if(mPlayer!=null&&mPlayer.isPlaying()){
mPlayer.seekTo(0);
return;
}
play(0);
}
publicvoidstop(){
if(mPlayer!=null&&mPlayer.isPlaying()){
mPlayer.stop();
mPlayer.release();
mPlayer=null;
mBtnPlay.setEnabled(true);
isPlaying=false;
}
}
}
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希望本文所述对大家Android程序设计有所帮助。