Android MP3 Play , Download and Delete

Android MP3 Play , Download and Delete 

1. Main.java

1. package android.test;  
2. import java.io.File;  
3. import java.io.FileOutputStream;  
4. import java.io.InputStream;  
5. import java.net.URL;  
6. import java.net.URLConnection;  
7. import android.app.Activity;  
8. import android.media.AudioManager;  
9. import android.media.MediaPlayer;  
10. import android.net.Uri;  
11. import android.os.Bundle;  
12. import android.util.Log;  
13. import android.view.View;  
14. import android.widget.ImageButton;  
15. public class Main extends Activity {  
16.     private ImageButton m_playBtn, m_pauseBtn, m_restBtn, m_stopBtn;  
17.     private MediaPlayer m_player;  
18.     private boolean m_bIsReleased = false;  
19.     private boolean m_bIsPaused = false;  
20.     private boolean m_bIsStreaming = true;  
21.   
22.     private String m_strFileURL = "http://www.yootiao.com/images/15.mp3";  
23.     private String m_strTempFilePath = "";  
24.     /** Called when the activity is first created. */  
25.     @Override  
26.     public void onCreate(Bundle savedInstanceState) {  
27.         super.onCreate(savedInstanceState);  
28.         setContentView(R.layout.main);  
29.         m_playBtn = (ImageButton) findViewById(R.id.playBtn);  
30.         m_pauseBtn = (ImageButton) findViewById(R.id.pauseBtn);  
31.         m_restBtn = (ImageButton) findViewById(R.id.resetBtn);  
32.         m_stopBtn = (ImageButton) findViewById(R.id.stopBtn);  
33.         m_playBtn.setOnClickListener(new ImageButton.OnClickListener() {  
34.             @Override  
35.             public void onClick(View v) {  
36.                 Play(m_strFileURL);  
37.                 LogI("MediaPlayer start playing");  
38.             }  
39.         });  
40.         m_pauseBtn.setOnClickListener(new ImageButton.OnClickListener() {  
41.             @Override  
42.             public void onClick(View v) {  
43.                 if (m_player != null) {  
44.                     if (!m_bIsReleased) {  
45.                         if (!m_bIsPaused) {  
46.                             m_player.pause();  
47.                             m_bIsPaused = true;  
48.                         } else {  
49.                             m_player.start();  
50.                             m_bIsPaused = false;  
51.                         }  
52.                     }  
53.                 }  
54.             }  
55.         });  
56.         m_restBtn.setOnClickListener(new ImageButton.OnClickListener() {  
57.             @Override  
58.             public void onClick(View v) {  
59.                 if (m_player != null) {  
60.                     if (!m_bIsReleased) {  
61.                         m_player.seekTo(0);  
62.                         LogI("MediaPlayer reset");  
63.                     }  
64.                 }  
65.             }  
66.         });  
67.         m_stopBtn.setOnClickListener(new ImageButton.OnClickListener() {  
68.             @Override  
69.             public void onClick(View v) {  
70.                 if (m_player != null) {  
71.                     if (!m_bIsReleased) {  
72.                         m_player.seekTo(0);  
73.                         m_player.pause();  
74.                         LogI("MediaPlayer stop");  
75.                     }  
76.                 }  
77.             }  
78.         });  
79.     }  
80.     private void Play(final String strURL) {  
81.         if (m_player != null) {  
82.             m_player.start();  
83.             return;  
84.         }  
85.         m_player = new MediaPlayer();  
86.         m_player.setAudioStreamType(AudioManager.STREAM_RING);  
87.         
88.         m_player.setOnErrorListener(new MediaPlayer.OnErrorListener() {  
89.             @Override  
90.             public boolean onError(MediaPlayer mp, int what, int extra) {  
91.                 LogI("Error on Listener, what: " + what + "extra: " + extra);  
92.                 return false;  
93.             }  
94.         });  
95.      
96.         m_player.setOnBufferingUpdateListener(new MediaPlayer.OnBufferingUpdateListener() {  
97.             @Override  
98.             public void onBufferingUpdate(MediaPlayer mp, int percent) {  
99.                 LogI("MediaPlayer Update buffer: " + Integer.toString(percent) + "%");  
100.             }  
101.         });  
102.  
103.         m_player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {  
104.             @Override  
105.             public void onCompletion(MediaPlayer mp) {  
106.                 LogI("MediaPlayer Listener Completed");  
107.             }  
108.         });  
109. 
     
110.         m_player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {  
111.             @Override  
112.             public void onPrepared(MediaPlayer mp) {  
113.                 LogI("MediaPlayer Prepared Listener");  
114.             }  
115.         });  
116.         Runnable r = new Runnable() {  
117.             @Override  
118.             public void run() {  
119.                 try {  
120.                     if (m_bIsStreaming) {  
121.                         m_player.setDataSource(Main.this, Uri.parse(m_strFileURL));  
122.                     } else {  
123.                         SetDataSource(strURL);  
124.                     }  
125.                     m_player.prepare();  
126.                     LogI("Duration: " + m_player.getDuration());  
127.                     m_player.start();  
128.                     m_bIsReleased = false;  
129.                 } catch (Exception e) {  
130.                     LogE(e.getMessage(), e);  
131.                 }  
132.             }  
133.         };  
134.         new Thread(r).start();  
135.     }  
136.     private void SetDataSource(String strURL) throws Exception {  
137.         if (!m_bIsReleased) {  
138.             URL url = new URL(strURL);  
139.             URLConnection conn = url.openConnection();  
140.             InputStream in = conn.getInputStream();  
141.             if (in == null)  
142.                 throw new RuntimeException("stream is null");  
143.             File file = File.createTempFile("player_mp3_cache", ".mp3", Main.this.getCacheDir());  
144.             if (!file.exists())  
145.                 file.createNewFile();  
146.             m_strTempFilePath = file.getAbsolutePath();  
147.             FileOutputStream fos = new FileOutputStream(file);  
148.             byte buffer[] = new byte[128];  
149.             do {  
150.                 int nNumRead = in.read(buffer);  
151.                 if (nNumRead <= 0)  
152.                     break;  
153.                 fos.write(buffer);  
154.             } while (true);  
155.             m_player.setDataSource(m_strTempFilePath);  
156.             in.close();  
157.             fos.close();  
158.         }  
159.     }  
160.     private void DeleteFile(String strPath) {  
161.         File file = new File(strPath);  
162.         if (file.exists())  
163.             file.delete();  
164.     }  
165.     private void LogI(String str) {  
166.         Log.i("Play_Web_Mp3", str);  
167.     }  
168.     private void LogE(String str, Throwable tr) {  
169.         Log.e("Play_Web_Mp3", str, tr);  
170.     }  
171.     @Override  
172.     protected void onPause() {  
173. 
     
174.         DeleteFile(m_strTempFilePath);  
175.         super.onPause();  
176.     }  
177. }  

2.  AndroidManifest.xml 

1. <?xml version="1.0" encoding="utf-8"?>  
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"  
3.       package="android.test"  
4.       android:versionCode="1"  
5.       android:versionName="1.0">  
6.     <uses-sdk android:minSdkVersion="7" />  
7.     <application android:icon="@drawable/icon" android:label="@string/app_name">  
8.         <activity android:name=".Main"  
9.                   android:label="@string/app_name">  
10.             <intent-filter>  
11.                 <action android:name="android.intent.action.MAIN" />  
12.                 <category android:name="android.intent.category.LAUNCHER" />  
13.             </intent-filter>  
14.         </activity>  
15.     </application>  
16.     <uses-permission android:name="android.permission.INTERNET"/>  
17.     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>  
18.     <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>      
19. </manifest>