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, ImageButton	playButton, Button	streamButton, SeekBar	progressBar,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, long	mediaLengthInKb, long	mediaLengthInSeconds) 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"/><Button	android: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"/><RelativeLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content" ><SeekBarandroid: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>	<RelativeLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content" ><ImageButton	android: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