android在线播放音乐

android在线音乐

一种方法是调用android自带的播放器

//调用系统自带播放器Intent intent = new Intent();Uri uri = Uri.parse("http://mul1.tximg.cn/music/group/bbs/mp3/44/100715/1279159638887.mp3?z=909255638");intent.setDataAndType(uri, "audio/*");intent.setAction(Intent.ACTION_VIEW);startActivity(intent);

另一种方法是边下载边播放

这只是一种思路，参考别人的代码，实现分段下载，但是我的代码还很不完善，这方面不准备继续下去了。

package com.sharpandroid.music.activity;import java.io.IOException;import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageButton;import android.widget.SeekBar;import android.widget.TextView;import com.sharpandroid.music.R;import com.sharpandroid.music.StreamingMediaPlay2;import com.sharpandroid.music.StreamingMediaPlayer;public class MediaPlayer extends Activity {private Button streamButton;private ImageButton playButton;private boolean isPlaying;private TextView playTime;private StreamingMediaPlayer audioStreamer;private StreamingMediaPlay2 audioStreamer2;    @Overridepublic void onCreate(Bundle icicle) {            super.onCreate(icicle);        setContentView(R.layout.main);        initControls();    }         private void initControls() {    playTime=(TextView) findViewById(R.id.playTime);streamButton = (Button) findViewById(R.id.button_stream);streamButton.setOnClickListener(new View.OnClickListener() {public void onClick(View view) {startStreamingAudio();        }});playButton = (ImageButton) findViewById(R.id.button_play);playButton.setEnabled(false);playButton.setOnClickListener(new View.OnClickListener() {public void onClick(View view) {if (audioStreamer2.getMediaPlayer().isPlaying()) {audioStreamer2.getMediaPlayer().pause();playButton.setImageResource(R.drawable.button_play);} else {audioStreamer2.getMediaPlayer().start();//audioStreamer.startPlayProgressUpdater();playButton.setImageResource(R.drawable.button_pause);}isPlaying = !isPlaying;        }});    }        private void startStreamingAudio() {    final SeekBar progressBar = (SeekBar) findViewById(R.id.progress_bar);if ( audioStreamer != null) {audioStreamer.interrupt();}//调用系统自带播放器//Intent intent = new Intent();//Uri uri = Uri.parse("http://mul1.tximg.cn/music/group/bbs/mp3/44/100715/1279159638887.mp3?z=909255638");//intent.setDataAndType(uri, "audio/*");//intent.setAction(Intent.ACTION_VIEW);//startActivity(intent);    audioStreamer2 = new StreamingMediaPlay2(this, playButton, streamButton,  progressBar, playTime);      audioStreamer2.startStreaming("http://mul1.tximg.cn/music/group/bbs/mp3/44/100715/1279159638887.mp3?z=909255638",5208, 216);    streamButton.setEnabled(false);            }}

下一个文件

package com.sharpandroid.music;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;import android.content.Context;import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Handler;import android.os.Message;import android.util.Log;import android.widget.Button;import android.widget.ImageButton;import android.widget.SeekBar;import android.widget.TextView;public class StreamingMediaPlay2 {private static final int INTIAL_KB_BUFFER =  96*10/8;//assume 96kbps*10secs/8bits per byteprivate ImageButton playButton;private SeekBar progressBar;private TextView playTime;private long mediaLengthInKb, mediaLengthInSeconds;private int totalKbRead = 0;private File downloadingMediaFile;private Context context;String url ;int progress_leng;private MediaPlayer mediaPlayer;private static final int DOWN_UPDATE = 1;boolean isplay = true;int playe = 0;private static final int DOWN_OVER = 2;private int progress;private final Handler handler = new Handler(){@Overridepublic void handleMessage(Message msg) {//super.handleMessage(msg);switch (msg.what) {case DOWN_UPDATE:progressBar.setProgress(progress);break;case DOWN_OVER:System.out.println("下载完成");break;}}};public StreamingMediaPlay2(Context  context, ImageButtonplayButton, ButtonstreamButton, SeekBarprogressBar,TextView playTime)  { this.context = context;this.playButton = playButton;this.playTime=playTime; //播放的进度时刻this.progressBar = progressBar;}public void startStreaming(final String mediaUrl, longmediaLengthInKb, longmediaLengthInSeconds) throws IOException {    //this.mediaLengthInKb = mediaLengthInKb;    //this.mediaLengthInSeconds = mediaLengthInSeconds;url = mediaUrl;Thread down = new Thread(download);down.start();    }Runnable download = new Runnable(){@Overridepublic void run() {// TODO Auto-generated method stubURLConnection cn;try {cn = new URL(url).openConnection();progress_leng = cn.getContentLength();System.out.println("play-------------------77------长度------"+progress_leng);cn.connect();                InputStream stream = cn.getInputStream();        if (stream == null) {        Log.e(getClass().getName(), "Unable to create InputStream for mediaUrl:" + url);        }downloadingMediaFile = new File(context.getCacheDir(),"downloadingMedia.dat");if (downloadingMediaFile.exists()) {downloadingMediaFile.delete();          //如果下载完成则删除}        FileOutputStream out = new FileOutputStream(downloadingMediaFile);           byte buf[] = new byte[1024*10];        int numread = -1;        int s = 0;        int count = 0;        int a = 0;        int sum = 0;        FileOutputStream out1 = null;      //  int totalBytesRead = 0, incrementalBytesRead = 0;        while((numread = stream.read(buf))!=-1){                byte [] b = new byte[numread];        //System.out.println("输出numread的值-----------"+numread);                //System.out.println(a+"----输出numread的值-----------"+sum);        if(a==0||a%88==0){                File file = new File(context.getCacheDir(),"play"+(++count)+".dat");        System.out.println("输出count的值-----------"+count);         out1 = new FileOutputStream(file,true);                }          a++;        sum +=numread;        if(out1!=null){        //b=buf;        out1.write(buf,0,numread);        }            out.write(buf, 0, numread);            s+=numread;            progress = (int) (((float) s / progress_leng) * 100);            handler.sendEmptyMessage(DOWN_UPDATE);            if(a==150){            System.out.println("下载完成了");            //播放音乐            Thread thread = new Thread(play);            thread.start();             handler.sendEmptyMessage(DOWN_OVER);            }         //   totalBytesRead += numread;       //     incrementalBytesRead += numread;        //    totalKbRead = totalBytesRead/1000;  //totalKbRead表示已经下载的文件大小           // testMediaBuffer();        //   fireDataLoadUpdate();        }          } catch (MalformedURLException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}   }};//播放音乐 public MediaPlayer getMediaPlayer() {    return mediaPlayer;}    private MediaPlayer createMediaPlayer(File mediaFile)    throws IOException {    MediaPlayer mPlayer = new MediaPlayer();    mPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {        public boolean onError(MediaPlayer mp, int what, int extra) {        Log.e(getClass().getName(), "Error in MediaPlayer: (" + what +") with extra (" +extra +")" );    return false;        }    });FileInputStream fis = new FileInputStream(mediaFile);mPlayer.setDataSource(fis.getFD());//此方法返回与流相关联的文件说明符。mPlayer.prepare();return mPlayer;    }        private void startMediaPlayer() {        try {           System.out.println("开始播放音乐");        File bufferedFile = new File(context.getCacheDir(),"play1" + ".dat");        //moveFile(downloadingMediaFile,bufferedFile);        Log.e(getClass().getName(),"Buffered File path: " + bufferedFile.getAbsolutePath());        Log.e(getClass().getName(),"Buffered File length: " + bufferedFile.length()+"");        mediaPlayer = createMediaPlayer(bufferedFile);        System.out.println(mediaPlayer.getDuration()+"------开始播放170---------------"+mediaPlayer.getCurrentPosition());                mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);    mediaPlayer.start();    //startPlayProgressUpdater();        //playButton.setEnabled(true);        } catch (IOException e) {        Log.e(getClass().getName(), "Error initializing the MediaPlayer.", e);        }       }    //播放MP3Runnable play = new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubwhile(isplay){  try {           System.out.println("开始播放音乐");//        File bufferedFile2 = new File(context.getCacheDir(),"play"+ (playe+1)+ ".dat");//        if(!bufferedFile2.exists()){//        isplay = false;//        }        File bufferedFile = new File(context.getCacheDir(),"play"+ (++playe)+ ".dat");        System.out.println("文件的名字为-------------"+playe);        if(bufferedFile.exists()){        mediaPlayer = createMediaPlayer(bufferedFile);        System.out.println(mediaPlayer.getDuration()+"------开始播放170---------------"+mediaPlayer.getCurrentPosition());        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);    mediaPlayer.start();    isplay = false;    try {Thread.sleep(120000);isplay = true;} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}            }        else{        System.out.println("文件不存在----------------");        isplay = false;        try {Thread.sleep(10000);isplay = true;} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}        }          //startPlayProgressUpdater();        //playButton.setEnabled(true);        } catch (IOException e) {        Log.e(getClass().getName(), "Error initializing the MediaPlayer.", e);        }   }}}; }

我这个只是为了验证是否想法可行，因此第二段音乐是在2分钟以后才继续播放的

布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:padding="10px"    android:background="@drawable/back"><TextView  android:id="@+id/text_kb_streamed"android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:textStyle="bold"        android:text="流媒体测试"/>    <Buttonandroid:id="@+id/button_stream"        android:layout_width="wrap_content"         android:layout_height="wrap_content"    android:layout_marginTop="10px"            style="?android:attr/buttonStyleSmall"         android:text="开始缓冲"/>   <RelativeLayout                android:layout_width="wrap_content"    android:layout_height="wrap_content"     >    <SeekBar    android:id="@+id/progress_bar"     android:layout_height="wrap_content"    android:layout_width="200px"    style="?android:attr/progressBarStyleHorizontal"    />      <TextView                android:id="@+id/playTime"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_toRightOf="@id/progress_bar"            android:text="00:00"    ></TextView> </RelativeLayout>   <RelativeLayout                android:layout_width="wrap_content"    android:layout_height="wrap_content"     >    <ImageButtonandroid:id="@+id/button_play"        android:layout_width="wrap_content"         android:layout_height="wrap_content"            android:layout_marginTop="5px"            style="?android:attr/buttonStyleSmall"     android:src="@drawable/button_pause"/></RelativeLayout></LinearLayout>

没有了，复制下来就能用

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