Audio

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Source code snippet:

 package com.example.shiyan; 
  
 import java.util.ArrayList;
 import java.util.List;
 import android.app.Service;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.drawable.BitmapDrawable;
 import android.media.MediaPlayer;
 import android.media.MediaPlayer.OnCompletionListener;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.IBinder;
 import android.view.animation.AnimationUtils;
 import android.widget.Toast; 
  
 /**
 * Class Description: Music playback service class
 * @author LiangAn
 * @version Created on March 18, 2015 at 10:24:17 AM
 */  
 public   class ControlPlay extends Service { 
  
 public   static MediaPlayer myMediaPlayer; 
  
 public   static MainActivity c_ma; 
  
 public   static   int playing_id = 0 ; 
  
 // Initialize the variable for the song playing time  
 private   int CurrentTime = 0 ;
 // Initialize the variable for the total time of the song  
 private   int CountTime = 0 ; 
  
 public   static Music_infoAdapter m_in; 
  
 public Thread thread;
    Handler handler = new Handler();
 public   boolean playFlag = true ;
 public   int vTemp = 0 ; 
      
  
 @Override  
 public IBinder onBind(Intent intent) {
 return   null ;
 } 
  
 @Override  
 public   void onCreate() {
 super .onCreate();
        initMediaSource(initMusicUri( 0 ));
 } 
  
 @Override  
 public   void onDestroy() {
 super .onDestroy();
 if (myMediaPlayer != null ) {
            myMediaPlayer.stop();
            myMediaPlayer.release();
            myMediaPlayer = null ;
 }
 } 
  
 @Override  
 public   void onStart(Intent intent, int startId) {
 super .onStart(intent, startId);
        String playFlag = intent.getExtras().getString( "control" );
 if ( "play" .equals(playFlag)) {
 playMusic();
 } else   if ( "next" .equals(playFlag)) {
 playNext();
 } else   if ( "front" .equals(playFlag)) {
 playFront();
 } else   if ( "listClick" .equals(playFlag)) {
            playing_id = intent.getExtras().getInt( "musicId_1" );
            initMediaSource(initMusicUri(playing_id));
 playMusic();
 } else   if ( "gridClick" .equals(playFlag)) {
            playing_id = intent.getExtras().getInt( "musicId_2" );
            initMediaSource(initMusicUri(playing_id));
 playMusic();
 }
 } 
  
 /**
 * Initialize the media object
 *
 * @param mp3Path
 * mp3 path
 */  
 public   void initMediaSource(String mp3Path) {
        Uri mp3Uri = Uri.parse(mp3Path);
 if (myMediaPlayer != null ) {
            myMediaPlayer.stop();
            myMediaPlayer.reset();
            myMediaPlayer = null ;
 }
 // Create an object for myMediaPlayer  
        myMediaPlayer = MediaPlayer.create( this , mp3Uri);
 //myMediaPlayer = MediaPlayer.create(this, R.raw.aaaa);  
 // c_ma.startRhythm(myMediaPlayer);  
 } 
  
 /**
 * Returns the song path of the row in the list
 *
 * @param _id
 * indicates the song number, starting from 0
 */  
 public String initMusicUri( int _id) {
 playing_id = _id;
 String s;
 // Get the value only when the list and list length are not empty  
 if (Music_infoAdapter.musicList != null  
                && Music_infoAdapter.musicList.size() != 0 ) {
            s = Music_infoAdapter.musicList.get(_id).getMusicPath();
 return s;
 } else {
 // Otherwise returns an empty string  
 return   "" ;
 }
 }
 /**
 * Music playback method, with pause method
 */  
 public   void playMusic() { 
  
 // Check that the song cannot be empty  
 System.out.println( "sfajfdsa" );
 if (myMediaPlayer != null && Music_infoAdapter.musicList.size() != 0 ) {
 if (myMediaPlayer.isPlaying()) {
 // Pause the song  
                myMediaPlayer.stop();
 // Change the play button background  
                MainActivity.play_ImageButton
                        .setBackgroundResource(R.drawable.play_button);
 //Cancel notification  
                MainActivity.mNotificationManager.cancel( 1 );
 } else {
                System.out.println( "sfajfdsa2" );
 // myMediaPlayer.start();  
 try {
 if (myMediaPlayer != null )
 {
                         myMediaPlayer.stop();
 }
                     myMediaPlayer.prepare();
                     myMediaPlayer.start(); 
                      
                    } catch (Exception e) { 
                     
                     e.printStackTrace();
 }
 // ///////////////////////// Initialize lyrics configuration //////////////////////// //   
  
 // Change background -  
                MainActivity.play_ImageButton
                        .setBackgroundResource(R.drawable.pause_button);
 // Start thread to update SeekBar  
                startSeekBarUpdate(); 
                  
 // Update the song number to play  
 int x = playing_id + 1 ;
                MainActivity.music_number.setText( "" + x + "/"  
                        + Music_infoAdapter.musicList.size()); 
  
 // Intercept .mp3 string  
                String a = Music_infoAdapter.musicList.get(playing_id)
                        .getMusicName();
 // int b = a.indexOf(".mp3");  
 // String c = a.substring(0, b);  
 // Switch to update song name with animation  
                MainActivity.music_Name.setText(a);
                MainActivity.music_Name.setAnimation(AnimationUtils
                        .loadAnimation(ControlPlay. this , R.anim.translate_z)); 
  
 // Update album name with animation  
                MainActivity.music_Album
                        .setText(Music_infoAdapter.musicList.get(playing_id)
                                .getMusicAlbum());
                MainActivity.music_Album.setAnimation(AnimationUtils
                        .loadAnimation(ControlPlay. this , R.anim.alpha_y)); 
  
 // Update song time  
                MainActivity.time_right.setText(Music_infoAdapter
                        .toTime(Music_infoAdapter.musicList.get(playing_id)
                                .getMusicTime())); 
  
 } 
  
 /**
 * Monitor whether the playback is completed
 */  
            myMediaPlayer.setOnCompletionListener( new OnCompletionListener() { 
  
 @Override  
 public   void onCompletion(MediaPlayer mp) {
 // TODO Auto-generated method stub   
  
 //After playing the current song, automatically play the next one  
                    playNext();
 }
 }); 
  
 } else {
 Toast.makeText(ControlPlay. this , "I can't find any songs on my phone..." ,
                    Toast.LENGTH_SHORT).show();
 }
 } 
  
 /**
 * Play next song
 */  
 public   void playNext() { 
  
 // Check that the song cannot be empty  
 if (Music_infoAdapter.musicList.size() != 0 ) {
 // If the *** song is played, keep playing the *** song  
 if (playing_id == Music_infoAdapter.musicList.size() - 1 ) {
                playing_id = Music_infoAdapter.musicList.size() - 1 ;
 Toast.makeText(ControlPlay. this , "It's the last song!" ,
                        Toast.LENGTH_SHORT).show(); 
  
                MainActivity.play_ImageButton
                        .setBackgroundResource(R.drawable.play_button);
                MainActivity.mNotificationManager.cancel( 1 ); 
  
 } else {
                initMediaSource(initMusicUri(++playing_id));
 playMusic();
 }
 } else {
 Toast.makeText(ControlPlay. this , "No songs found!" , Toast.LENGTH_SHORT)
 .show();
 }
 } 
  
 /**
 * Play previous song
 */  
 public   void playFront() { 
  
 // Check that the song cannot be empty  
 if (Music_infoAdapter.musicList.size() != 0 ) {
 // If the ***th song is played, keep playing the ***th song  
 if (playing_id == 0 ) {
                playing_id = 0 ;
 Toast.makeText(ControlPlay. this , "Now it's the first song!" ,
                        Toast.LENGTH_SHORT).show();
 } else {
                initMediaSource(initMusicUri(--playing_id));
 playMusic();
 }
 } else {
 Toast.makeText(ControlPlay. this , "No songs found!" , Toast.LENGTH_SHORT)
 .show();
 }
 } 
  
 public   void startSeekBarUpdate() {
 handler.post(start);
 } 
  
    Runnable start = new Runnable() { 
  
 @Override  
 public   void run() {
 // TODO Auto-generated method stub   
  
            handler.post(updatesb);
 } 
  
 }; 
  
    Runnable updatesb = new Runnable() { 
  
 @Override  
 public   void run() {
 // Get the time it takes for SeekBar to move there  
            MainActivity.play_time = myMediaPlayer
                    .getCurrentPosition(); 
  
 // Set the progress of filling the current acquisition  
            MainActivity.seekbar
                    .setProgress(MainActivity.play_time);
 //The *** value of SeekBar is filled with song time  
            MainActivity.seekbar.setMax(Music_infoAdapter.musicList
                    .get(playing_id).getMusicTime()); 
  
 // The thread starts after a delay of 1000 milliseconds  
            handler.postDelayed(updatesb, 1000 );
 }
 }; 
  
    Handler mHandler = new Handler(); 
      
  
      
 }