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;
@Override
public 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 byte
private ImageButton playButton;
private SeekBarprogressBar;
private TextView playTime;
private long mediaLengthInKb, mediaLengthInSeconds;
private int totalKbRead = 0;
private File downloadingMediaFile;
private Context context;
String url ;
int progress_leng;
private MediaPlayermediaPlayer;
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()
{
@Override
public 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(Contextcontext, 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(){
@Override
public void run() {
// TODO Auto-generated method stub
URLConnection 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 block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.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MP3
Runnable play = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
while(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 block
e.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 block
e.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"?>
<LinearLayoutxmlns: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">
<TextViewandroid: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"/>
<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"
>
<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>
