android在線播放音樂

種方法是調用android自帶的播放器

1 //調用系統自帶播放器 

2         Intent intent = new Intent(); 

3         Uri uri = Uri.parse("http://mul1.tximg.cn/music/group/bbs/mp3/44/100715/1279159638887.mp3?z=909255638"); 

4         intent.setDataAndType(uri, "audio/*"); 

5         intent.setAction(Intent.ACTION_VIEW); 

6         startActivity(intent);

另一種方法是邊下載邊播放

這只是一種思路，參考別人的代碼，實現分段下載，但是我的代碼還很不完善，這方面不准備繼續下去了。

 

01 package com.sharpandroid.music.activity; 

02   

03 import java.io.IOException; 

04 import android.app.Activity; 

05 import android.content.Intent; 

06 import android.net.Uri; 

07 import android.os.Bundle; 

08 import android.util.Log; 

09 import android.view.View; 

10 import android.widget.Button; 

11 import android.widget.ImageButton; 

12 import android.widget.SeekBar; 

13 import android.widget.TextView; 

14   

15 import com.sharpandroid.music.R; 

16 import com.sharpandroid.music.StreamingMediaPlay2; 

17 import com.sharpandroid.music.StreamingMediaPlayer; 

18   

19   

20 public class MediaPlayer extends Activity { 

21   

22     private Button streamButton; 

23     private ImageButton playButton; 

24     private boolean isPlaying; 

25     private TextView playTime; 

26     private StreamingMediaPlayer audioStreamer; 

27     private StreamingMediaPlay2 audioStreamer2; 

28       

29     @Override

30     public void onCreate(Bundle icicle) { 

31           

32         super.onCreate(icicle); 

33   

34         setContentView(R.layout.main); 

35         initControls(); 

36     }  

37       

38     private void initControls() { 

39         playTime=(TextView) findViewById(R.id.playTime); 

40         streamButton = (Button) findViewById(R.id.button_stream); 

41           

42         streamButton.setOnClickListener(new View.OnClickListener() { 

43             public void onClick(View view) { 

44                 startStreamingAudio(); 

45         }}); 

46   

47         playButton = (ImageButton) findViewById(R.id.button_play); 

48         playButton.setEnabled(false); 

49         playButton.setOnClickListener(new View.OnClickListener() { 

50             public void onClick(View view) { 

51                 if (audioStreamer2.getMediaPlayer().isPlaying()) { 

52                     audioStreamer2.getMediaPlayer().pause(); 

53                     playButton.setImageResource(R.drawable.button_play); 

54                 } else { 

55                     audioStreamer2.getMediaPlayer().start(); 

56                     //audioStreamer.startPlayProgressUpdater(); 

57                     playButton.setImageResource(R.drawable.button_pause); 

58                 } 

59                 isPlaying = !isPlaying; 

60         }}); 

61     } 

62       

63     private void startStreamingAudio() { 

64         final SeekBar progressBar = (SeekBar) findViewById(R.id.progress_bar); 

65         if ( audioStreamer != null) { 

66             audioStreamer.interrupt(); 

67         } 

68         //調用系統自帶播放器 

69 //      Intent intent = new Intent(); 

70 //      Uri uri = Uri.parse("http://mul1.tximg.cn/music/group/bbs/mp3/44/100715/1279159638887.mp3?z=909255638"); 

71 //      intent.setDataAndType(uri, "audio/*"); 

72 //      intent.setAction(Intent.ACTION_VIEW); 

73 //      startActivity(intent); 

74             audioStreamer2 = new StreamingMediaPlay2(this, playButton, streamButton,  progressBar, playTime); 

75             audioStreamer2.startStreaming("http://mul1.tximg.cn/music/group/bbs/mp3/44/100715/1279159638887.mp3?z=909255638",5208, 216); 

76             streamButton.setEnabled(false); 

77                   

78     } 

79 }

 

 下一個文件

001 package com.sharpandroid.music; 

002   

003 import java.io.File; 

004 import java.io.FileInputStream; 

005 import java.io.FileOutputStream; 

006 import java.io.IOException; 

007 import java.io.InputStream; 

008 import java.net.MalformedURLException; 

009 import java.net.URL; 

010 import java.net.URLConnection; 

011   

012 import android.content.Context; 

013 import android.media.AudioManager; 

014 import android.media.MediaPlayer; 

015 import android.os.Handler; 

016 import android.os.Message; 

017 import android.util.Log; 

018 import android.widget.Button; 

019 import android.widget.ImageButton; 

020 import android.widget.SeekBar; 

021 import android.widget.TextView; 

022   

023 public class StreamingMediaPlay2 { 

024     private static final int INTIAL_KB_BUFFER =  96*10/8;//assume 96kbps*10secs/8bits per byte 

025     private ImageButton playButton; 

026     private SeekBar     progressBar; 

027     private TextView playTime; 

028     private long mediaLengthInKb, mediaLengthInSeconds; 

029     private int totalKbRead = 0; 

030     private File downloadingMediaFile; 

031     private Context context; 

032     String url ; 

033     int progress_leng; 

034     private MediaPlayer     mediaPlayer; 

035     private static final int DOWN_UPDATE = 1; 

036     boolean isplay = true; 

037     int playe = 0; 

038     private static final int DOWN_OVER = 2; 

039     private int progress; 

040       

041     private final Handler handler = new Handler() 

042     { 

043         @Override

044         public void handleMessage(Message msg) { 

045             //super.handleMessage(msg); 

046             switch (msg.what) { 

047             case DOWN_UPDATE: 

048                 progressBar.setProgress(progress); 

049                 break; 

050             case DOWN_OVER: 

051                 System.out.println("下載完成"); 

052                 break; 

053             } 

054         } 

055     }; 

056     public StreamingMediaPlay2(Context  context, ImageButton    playButton, Button  streamButton, SeekBar   progressBar,TextView playTime)  

057     { 

058         this.context = context; 

059         this.playButton = playButton; 

060         this.playTime=playTime; //播放的進度時刻 

061         this.progressBar = progressBar; 

062     } 

063       

064     public void startStreaming(final String mediaUrl, long  mediaLengthInKb, long   mediaLengthInSeconds) throws IOException { 

065     //  this.mediaLengthInKb = mediaLengthInKb; 

066         //this.mediaLengthInSeconds = mediaLengthInSeconds; 

067         url = mediaUrl; 

068         Thread down = new Thread(download); 

069         down.start(); 

070     } 

071       

072     Runnable download = new Runnable(){ 

073   

074         @Override

075         public void run() { 

076             // TODO Auto-generated method stub 

077             URLConnection cn; 

078             try { 

079                 cn = new URL(url).openConnection(); 

080                 progress_leng = cn.getContentLength(); 

081                 System.out.println("play-------------------77------長度------"+progress_leng); 

082                 cn.connect();         

083             InputStream stream = cn.getInputStream(); 

084             if (stream == null) { 

085                 Log.e(getClass().getName(), "Unable to create InputStream for mediaUrl:" + url); 

086             } 

087             downloadingMediaFile = new File(context.getCacheDir(),"downloadingMedia.dat");           

088             if (downloadingMediaFile.exists()) { 

089                 downloadingMediaFile.delete();          //如果下載完成則刪除 

090             } 

091             FileOutputStream out = new FileOutputStream(downloadingMediaFile);    

092             byte buf[] = new byte[1024*10]; 

093             int numread = -1; 

094             int s = 0; 

095             int count = 0; 

096             int a = 0; 

097             int sum = 0; 

098             FileOutputStream out1 = null; 

099           //  int totalBytesRead = 0, incrementalBytesRead = 0; 

100             while((numread = stream.read(buf))!=-1){                 

101                 byte [] b = new byte[numread]; 

102                 //System.out.println("輸出numread的值-----------"+numread); 

103                   

104                 //System.out.println(a+"----輸出numread的值-----------"+sum); 

105                 if(a==0||a%88==0){                   

106                     File file = new File(context.getCacheDir(),"play"+(++count)+".dat"); 

107                     System.out.println("輸出count的值-----------"+count); 

108                      out1 = new FileOutputStream(file,true); 

109                       

110                 }  

111                  a++; 

112                 sum +=numread; 

113                 if(out1!=null){ 

114                 //b=buf; 

115                 out1.write(buf,0,numread); 

116                 } 

117                 out.write(buf, 0, numread); 

118                 s+=numread; 

119                 progress = (int) (((float) s / progress_leng) * 100); 

120                 handler.sendEmptyMessage(DOWN_UPDATE); 

121                 if(a==150){ 

122                     System.out.println("下載完成了"); 

123                     //播放音樂 

124                     Thread thread = new Thread(play); 

125                     thread.start(); 

126                      handler.sendEmptyMessage(DOWN_OVER); 

127                 } 

128              //   totalBytesRead += numread; 

129            //     incrementalBytesRead += numread; 

130             //    totalKbRead = totalBytesRead/1000;  //totalKbRead表示已經下載的文件大小 

131                // testMediaBuffer(); 

132             //      fireDataLoadUpdate(); 

133             }    

134                   

135             } catch (MalformedURLException e) { 

136                 // TODO Auto-generated catch block 

137                 e.printStackTrace(); 

138             } catch (IOException e) { 

139                 // TODO Auto-generated catch block 

140                 e.printStackTrace(); 

141             }    

142         } 

143           

144           

145     }; 

146     //播放音樂 

147      public MediaPlayer getMediaPlayer() { 

148             return mediaPlayer; 

149         } 

150         private MediaPlayer createMediaPlayer(File mediaFile) 

151         throws IOException { 

152             MediaPlayer mPlayer = new MediaPlayer(); 

153             mPlayer.setOnErrorListener( 

154                     new MediaPlayer.OnErrorListener() { 

155                         public boolean onError(MediaPlayer mp, int what, int extra) { 

156                             Log.e(getClass().getName(), "Error in MediaPlayer: (" + what +") with extra (" +extra +")" ); 

157                             return false; 

158                         } 

159                     }); 

160             FileInputStream fis = new FileInputStream(mediaFile); 

161               

162             mPlayer.setDataSource(fis.getFD());//此方法返回與流相關聯的文件說明符。 

163             mPlayer.prepare(); 

164               

165             return mPlayer; 

166         } 

167           

168         private void startMediaPlayer() { 

169             try {    

170                 System.out.println("開始播放音樂"); 

171                 File bufferedFile = new File(context.getCacheDir(),"play1" + ".dat"); 

172             //  moveFile(downloadingMediaFile,bufferedFile); 

173                 Log.e(getClass().getName(),"Buffered File path: " + bufferedFile.getAbsolutePath()); 

174                 Log.e(getClass().getName(),"Buffered File length: " + bufferedFile.length()+""); 

175                 mediaPlayer = createMediaPlayer(bufferedFile); 

176                 System.out.println(mediaPlayer.getDuration()+"------開始播放170---------------"+mediaPlayer.getCurrentPosition());               

177                 mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 

178                 mediaPlayer.start(); 

179                 //startPlayProgressUpdater();     

180               

181             //  playButton.setEnabled(true); 

182             } catch (IOException e) { 

183                 Log.e(getClass().getName(), "Error initializing the MediaPlayer.", e); 

184             }    

185         } 

186         //播放MP3 

187     Runnable play = new Runnable() { 

188           

189         @Override

190         public void run() { 

191             // TODO Auto-generated method stub 

192             while(isplay){ 

193                   try {    

194                         System.out.println("開始播放音樂"); 

195 //                      File bufferedFile2 = new File(context.getCacheDir(),"play"+ (playe+1)+ ".dat"); 

196 //                      if(!bufferedFile2.exists()){ 

197 //                          isplay = false; 

198 //                      } 

199                         File bufferedFile = new File(context.getCacheDir(),"play"+ (++playe)+ ".dat"); 

200                         System.out.println("文件的名字為-------------"+playe); 

201                         if(bufferedFile.exists()){ 

202                             mediaPlayer = createMediaPlayer(bufferedFile); 

203                             System.out.println(mediaPlayer.getDuration()+"------開始播放170---------------"+mediaPlayer.getCurrentPosition()); 

204                             mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 

205                             mediaPlayer.start(); 

206                             isplay = false; 

207                             try { 

208                                 Thread.sleep(120000); 

209                                 isplay = true; 

210                             } catch (InterruptedException e) { 

211                                 // TODO Auto-generated catch block 

212                                 e.printStackTrace(); 

213                             } 

214           

215                         } 

216                         else{ 

217                             System.out.println("文件不存在----------------"); 

218                             isplay = false; 

219                             try { 

220                                 Thread.sleep(10000); 

221                                 isplay = true; 

222                             } catch (InterruptedException e) { 

223                                 // TODO Auto-generated catch block 

224                                 e.printStackTrace(); 

225                             } 

226                         } 

227           

228                         //startPlayProgressUpdater();     

229                       

230                     //  playButton.setEnabled(true); 

231                     } catch (IOException e) { 

232                         Log.e(getClass().getName(), "Error initializing the MediaPlayer.", e); 

233                     }    

234             } 

235         } 

236     }; 

237        

238 }

我這個只是為了驗證是否想法可行，因此第二段音樂是在2分鐘以後才繼續播放的

布局文件

01 <?xml version="1.0" encoding="utf-8"?> 

02 <LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"

03                 android:orientation="vertical"

04                 android:layout_width="fill_parent"

05                 android:layout_height="fill_parent"

06                 android:padding="10px"

07                 android:background="@drawable/back"> 

08   

09     <TextView    android:id="@+id/text_kb_streamed"

10                 android:layout_width="fill_parent" 

11                 android:layout_height="wrap_content" 

12                 android:textStyle="bold"

13                 android:text="流媒體測試"/> 

14       

15         <Button  android:id="@+id/button_stream"

16             android:layout_width="wrap_content" 

17             android:layout_height="wrap_content"

18             android:layout_marginTop="10px"

19             style="?android:attr/buttonStyleSmall" 

20             android:text="開始緩沖"/> 

21   

22    <RelativeLayout 

23                 android:layout_width="wrap_content"

24                 android:layout_height="wrap_content" 

25     > 

26                 <SeekBar 

27     android:id="@+id/progress_bar" 

28     android:layout_height="wrap_content"

29     android:layout_width="200px"

30     style="?android:attr/progressBarStyleHorizontal"

31     /> 

32       <TextView   

33               android:id="@+id/playTime"

34             android:layout_width="wrap_content"

35             android:layout_height="wrap_content"

36             android:layout_toRightOf="@id/progress_bar"

37             android:text="00:00"

38     ></TextView> 

39     www.2cto.com

40 </RelativeLayout>  

41    <RelativeLayout 

42                 android:layout_width="wrap_content"

43                 android:layout_height="wrap_content" 

44     > 

45     <ImageButton android:id="@+id/button_play"

46                     android:layout_width="wrap_content" 

47                     android:layout_height="wrap_content"

48                     android:layout_marginTop="5px"

49                     style="?android:attr/buttonStyleSmall" 

50                     android:src="@drawable/button_pause"/> 

51 </RelativeLayout>