android实现在线播放流媒体

实现功能:播放网络音频,无需下载,边加载边下载,并支持拖动.此项目参看某一个前辈的博客.

如有问题可以回帖留言,能够得到大家的指导:

代码如下:

布局文件：

                    <?xmlversion="1.0"encoding="utf-8"?>
            <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            >
            <Button
            android:id="@+id/btnPlayUrl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="播放">
            </Button>
            <SeekBar
            android:id="@+id/skbProgress"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:max="100"
            android:paddingLeft="10dip"
            android:paddingRight="10dip">
            </SeekBar>
            </LinearLayout>

主Activity

                    importandroid.os.Bundle;
            importandroid.app.Activity;
            importandroid.view.View;
            importandroid.view.View.OnClickListener;
            importandroid.widget.Button;
            importandroid.widget.SeekBar;
            
            publicclassMainActivityextendsActivityimplementsOnClickListener{
            
            privateButtonbtnPlayUrl;
            privateSeekBarskbProgress;
            privatePlayerplayer;
            intprogress;
            
            @Override
            publicvoidonCreate(BundlesavedInstanceState){
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            btnPlayUrl=(Button)this.findViewById(R.id.btnPlayUrl);
            btnPlayUrl.setOnClickListener(this);
            skbProgress=(SeekBar)this.findViewById(R.id.skbProgress);
            skbProgress.setOnSeekBarChangeListener(newSeekBarChangeEvent());
            player=newPlayer(skbProgress);
            
            }
            
            @Override
            publicvoidonClick(Viewv){
            intid=v.getId();
            switch(id){
            caseR.id.btnPlayUrl:
            //网络音频地址
            Stringurl="http://www........aaa.amr";
            player.playUrl(url);
            break;
            default:
            break;
            }
            }
            
            classSeekBarChangeEventimplementsSeekBar.OnSeekBarChangeListener{
            
            @Override
            publicvoidonProgressChanged(SeekBarseekBar,intprogress,
            booleanfromUser){
            MainActivity.this.progress=progress
            *player.mediaPlayer.getDuration()/seekBar.getMax();
            }
            
            @Override
            publicvoidonStartTrackingTouch(SeekBarseekBar){
            }
            
            @Override
            publicvoidonStopTrackingTouch(SeekBarseekBar){
            player.mediaPlayer.seekTo(progress);
            }
            }
            
            }

播放器

                    importjava.io.IOException;
            importjava.util.Timer;
            importjava.util.TimerTask;
            importandroid.media.AudioManager;
            importandroid.media.MediaPlayer;
            importandroid.os.Handler;
            importandroid.os.Message;
            importandroid.util.Log;
            importandroid.widget.SeekBar;
            
            publicclassPlayerimplementsMediaPlayer.OnPreparedListener{
            publicMediaPlayermediaPlayer;
            privateSeekBarskbProgress;
            privateTimermTimer=newTimer();
            publicPlayer(SeekBarskbProgress)
            {
            this.skbProgress=skbProgress;
            try{
            mediaPlayer=newMediaPlayer();
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mediaPlayer.setOnPreparedListener(this);
            }catch(Exceptione){
            Log.e("mediaPlayer","error",e);
            }
            mTimer.schedule(mTimerTask,0,10);
            }
            
            TimerTaskmTimerTask=newTimerTask(){
            @Override
            publicvoidrun(){
            if(mediaPlayer==null)
            return;
            if(mediaPlayer!=null){
            if(mediaPlayer.isPlaying()&&skbProgress.isPressed()==false){
            handleProgress.sendEmptyMessage(0);
            }
            }
            }
            };
            
            HandlerhandleProgress=newHandler(){
            publicvoidhandleMessage(Messagemsg){
            if(mediaPlayer==null){
            return;
            }
            intposition=mediaPlayer.getCurrentPosition();
            intduration=mediaPlayer.getDuration();
            if(duration>0){
            longpos=skbProgress.getMax()*position/duration;
            skbProgress.setProgress((int)pos);
            }
            };
            };
            
            
            publicvoidplayUrl(StringvideoUrl)
            {
            try{
            mediaPlayer.reset();
            mediaPlayer.setDataSource(videoUrl);
            mediaPlayer.prepareAsync();
            }catch(IllegalArgumentExceptione){
            e.printStackTrace();
            }catch(IllegalStateExceptione){
            e.printStackTrace();
            }catch(IOExceptione){
            e.printStackTrace();
            }
            }
            
            @Override
            publicvoidonPrepared(MediaPlayerarg0){
            arg0.start();
            Log.e("mediaPlayer","onPrepared");
            }
            }

实现图片：

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