Android音乐播放器作为一项服务，并在用户界面上显示标题曲目、专辑图像

我试图用android编写音乐播放器代码。我想显示歌曲的当前标题、艺术家和专辑图像。 活动是： 包com.example.getmusic

import java.io.IOException;
import java.util.ArrayList;


import com.example.getmusic.PlayMusicService.LocalBinder;




import android.media.AudioManager;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.provider.MediaStore;
import android.provider.MediaStore.Audio;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.res.Configuration;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class GetMusic extends Activity implements OnGestureListener {
      static Handler seekhandler=new Handler();
      boolean isServiceConnected=false;
      PlayMusicService playServ;
     static  TextView tv1,tv2,tv3;
    Button previous,next;static ImageView img;static GestureDetector gDetector;
    int pausePressed=1;static SeekBar sb;

    int currentIndex=0;Cursor cursor;GenericSongClass GSC;
    static MediaPlayer mediaPlayer;static int posofaudiotrack;
    private ServiceConnection conn=new ServiceConnection() {

        @Override
        public void onServiceDisconnected(ComponentName name) {
            // TODO Auto-generated method stub
            isServiceConnected=false;
        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            // TODO Auto-generated method stub

    LocalBinder binder=(LocalBinder)service;
    playServ=binder.getService();
    isServiceConnected=true;

        }
    };


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_get_music);
        gDetector= new GestureDetector(this);
        tv1=(TextView)findViewById(R.id.textView1);
        tv2=(TextView)findViewById(R.id.textView2);
        tv3=(TextView)findViewById(R.id.textView3);
        getSongs();

        img=(ImageView)findViewById(R.id.imageView1);
        sb=(SeekBar)findViewById(R.id.seekBar1);
        try{
        Intent serv = new Intent(this,PlayMusicService.class);

            bindService(serv, conn, Context.BIND_AUTO_CREATE);
        System.out.println("in try calling service");
        startService(serv);
        }
        catch(Exception e){
            System.out.println("Exception is"+e);
        }
        System.out.println("after binding");
        /* 
        try {
            playSong(0);


    }
        catch(Exception e){
        System.out.println("Exception is"+e);
    }*/
         //PlayMusic p=new PlayMusic();
        // p.execute();

    }


    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        super.onStop();
         if (isServiceConnected) {
                unbindService(conn);
                isServiceConnected = false;
            }
    }


    public static void mediaPlayerPause()
    {

        if(mediaPlayer!=null)
        {

            mediaPlayer.pause();
            posofaudiotrack=mediaPlayer.getCurrentPosition();
        }

    }
    public void mediaPlayerResume()
    {

        if(mediaPlayer!=null&&!mediaPlayer.isPlaying())
        {
            mediaPlayer.seekTo(mediaPlayer.getCurrentPosition());
            mediaPlayer.start();
        }
    }
    public class PlayMusic  extends AsyncTask<Void, Void, Void>
    {

        @Override
        protected Void doInBackground(Void... params) {
            // TODO Auto-generated method stub
            getSongs();
            return null;
        }

    }
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        // TODO Auto-generated method stub
        super.onConfigurationChanged(newConfig);
    }

    public static ArrayList<GenericSongClass> songs = null;

    public void getSongs() {        

        Toast.makeText(getApplicationContext(), "in BindAllSongs()", Toast.LENGTH_SHORT).show();
            String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
            final String[] projection = new String[] {
                    MediaStore.Audio.Media.DISPLAY_NAME,
                    MediaStore.Audio.Media.ARTIST,

                    MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.COMPOSER,MediaStore.Audio.Media.TITLE,MediaStore.Audio.Media.ALBUM
                    };
                    final String sortOrder = MediaStore.Audio.AudioColumns.TITLE
                            + " COLLATE LOCALIZED ASC";

                    try {

                        Uri uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;


                       cursor = getBaseContext().getContentResolver().query(uri,
                                projection, selection, null, sortOrder);
                     /*  int column_index = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
                       String s=cursor.getString(column_index);*/
                      // Toast.makeText(getApplicationContext(), "path is"+s, Toast.LENGTH_SHORT).show();
                      // System.out.println("path is"+s);


                       if (null == cursor) {
                            Log.e("error","cursor is null");
                        // If the Cursor is empty, the provider found no matches
                        } else if (cursor.getCount() < 1) {

                            Log.i("info","cursor count<1");
                        } else {



                            songs = new ArrayList<GenericSongClass>(cursor.getCount());
                            cursor.moveToFirst(); 
                            int colIndex=cursor.getColumnIndex(MediaStore.Audio.Media.DATA);
                            String path = cursor.getString(colIndex);
                           // Toast.makeText(getApplicationContext(), "PATH IS"+path, Toast.LENGTH_SHORT).show();
                            System.out.println("PATH IS"+path);
                            while (!cursor.isAfterLast()) { 
                                GSC = new GenericSongClass();
                                GSC.songTitle = cursor.getString(0);
                                GSC.songArtist = cursor.getString(1);   
                                GSC.songData = cursor.getString(2);
                                GSC.songComposer=cursor.getString(3);
                                GSC.title=cursor.getString(4);
                                GSC.album=cursor.getString(5);

                                songs.add(GSC);
                                cursor.moveToNext();

                            }


                         //   Toast.makeText(getApplicationContext(), "songs first is"+songs.get(0).songTitle, Toast.LENGTH_SHORT).show();
                         //   Toast.makeText(getApplicationContext(), "songs length is"+songs.size(), Toast.LENGTH_SHORT).show();
                           mediaPlayer=new MediaPlayer();
                            mediaPlayer.setOnPreparedListener(new OnPreparedListener() {

                                @Override
                                public void onPrepared(MediaPlayer mp) {
                                    // TODO Auto-generated method stub
                                     Log.e("I", "Media player has been loaded to memory !");
                                }
                            });
                            /*for(int i=0;i<songs.size();i++){
                                if(mediaPlayer.isPlaying())
                                    mediaPlayer.reset();
                                String p=songs.get(i).songData;
                                mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);*/


                        }
                    }
                        catch (Exception ex) {
                      Toast.makeText(getApplicationContext(), "exception is"+ex, Toast.LENGTH_SHORT).show();
                      Log.i("ex is",ex.toString());
                    } finally {
                        if (cursor != null) {
                            cursor.close();
                        }}
                    }



    protected void getPreviousSong()
    {

        if(currentIndex==0)
            currentIndex=songs.size()-1;
        else{
            currentIndex=currentIndex-1;
            }
        playSong(currentIndex);
    }
    protected void getNextSong() {
        // TODO Auto-generated method stub

        if(currentIndex == songs.size()-1){
            currentIndex=0;

        }
        else
        {
            currentIndex=currentIndex+1;


        }
        playSong(currentIndex);
    }
    private void playSong(int index) {
        // TODO Auto-generated method stub
        try{
            mediaPlayer.reset();
            String p=songs.get(index).songData;
        System.out.println("Song title is"+songs.get(1).songTitle+"artist"+songs.get(1).songArtist+"composer is"+songs.get(1).songComposer.valueOf(0)+"title is"+songs.get(1).title);
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
      tv1.setText(songs.get(index).title);
      tv2.setText(songs.get(index).album);
      tv3.setText(songs.get(index).songArtist);
     // tv3.append(songs.get(index).album);
        mediaPlayer.setDataSource(p);
        MediaMetadataRetriever mmr = new MediaMetadataRetriever();
        byte[] rawArt;
        Bitmap art = null;
        BitmapFactory.Options bfo=new BitmapFactory.Options();
      mmr.setDataSource(p);

        rawArt = mmr.getEmbeddedPicture();



        if (null != rawArt) 
            art = BitmapFactory.decodeByteArray(rawArt, 0, rawArt.length, bfo);
        img.setImageBitmap(art);
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();;
        } catch (SecurityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();
            Log.d("exc","exception is"+e.toString());
            System.out.println("exception is"+e.toString());
        }
        try {
            mediaPlayer.prepare();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "prepate exception is"+e.toString(), Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "prepate exception is"+e.toString(), Toast.LENGTH_SHORT).show();
            System.out.println("exception is"+e.toString());
        }

        mediaPlayer.start();
        sb.setMax(mediaPlayer.getDuration());
        seekUpdation();
sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
            seekhandler.removeCallbacks(run);
            mediaPlayer.seekTo(seekBar.getProgress());
            seekhandler.postDelayed(run, 1000);
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                seekhandler.removeCallbacks(run);

            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser) {
                // TODO Auto-generated method stub

            }
        });
        mediaPlayer.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mediaPlayer) {
                // TODO Auto-generated method stub
                pausePressed=1;
                playServ.getNextSong();

            }
        });

                    }



     Runnable run = new Runnable() {

            @Override
            public void run() {
                seekUpdation();
            }
        };


        public void seekUpdation() {

            sb.setProgress(mediaPlayer.getCurrentPosition());
            seekhandler.postDelayed(run, 1000);
        }
    public class GenericSongClass {

            String songTitle = "";
            String songArtist = "";
            String songData = "";
            String songComposer="";
            String title="";
            String album="";
            String isChecked = "false";
    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.get_music, menu);
        return true;
    }

    @Override
    public boolean onDown(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onTouchEvent(MotionEvent me) {
    return gDetector.onTouchEvent(me);
    }
    @Override
    public boolean onFling(MotionEvent start, MotionEvent finish, float velocityX,
            float velocityY) {
        pausePressed=1;//int x=playServ.getCurrentIndex();
        // TODO Auto-generated method stub
        if(start.getRawX() < finish.getRawX())
        {
            //Toast.makeText(getApplicationContext(), "chanegd", Toast.LENGTH_SHORT).show();
            if(playServ!=null){

            /*  if(x==0)
                    x=songs.size()-1;
                else{
                    x=currentIndex-1;
                    }
                  tv1.setText(songs.get(x).title);
                  tv2.setText(songs.get(x).album);
                  tv3.setText(songs.get(x).songArtist);
                 tv3.append(songs.get(x).album);*/

            playServ.getPreviousSong();}
            else
                System.out.println("ms null");
        }
        else if(start.getRawX()>finish.getRawX())
        {
            //Toast.makeText(getApplicationContext(), "changed on other", Toast.LENGTH_SHORT).show();

            Log.d("onFLing","in onFling");
            if(playServ!=null){
                /*
                if(x == songs.size()-1){
                    x=0;

                }
                else
                {
                    x=x+1;


                }
                  tv1.setText(songs.get(x).title);
                  tv2.setText(songs.get(x).album);
                  tv3.setText(songs.get(x).songArtist);
                 tv3.append(songs.get(x).album);*/
            playServ.getNextSong();
            }
            else
                System.out.println("ms null");
        }
        return true;

    }

    @Override
    public void onLongPress(MotionEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
            float distanceY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        // TODO Auto-generated method stub
    System.out.println("PAUSEPRESSED"+pausePressed);
        if(pausePressed==1){
            pausePressed=0;
            playServ.mediaPlayerPause();
        }else if(pausePressed==0){
            pausePressed=1;


                //mediaPlayer.seekTo(posofaudiotrack);
                playServ.mediaPlayerResume();


        }
        return true;
    }

}
and the Service is:
package com.example.getmusic;

import java.io.IOException;
import java.util.ArrayList;

import com.example.getmusic.GetMusic.GenericSongClass;

import android.app.Service;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.AudioManager;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import android.widget.SeekBar;
import android.widget.Toast;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class PlayMusicService extends Service{
    MediaPlayer mp;int currentIndex=0;
    ArrayList<GenericSongClass> songs=GetMusic.songs;int pausePressed=1;
    IBinder servbind=new LocalBinder();
    public class LocalBinder extends Binder{
        PlayMusicService getService()
        {
            return PlayMusicService.this;
        }
    }
    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return servbind;
    }


    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        mp=new MediaPlayer();
        mp.setOnPreparedListener(new OnPreparedListener() {

            @Override
            public void onPrepared(MediaPlayer arg0) {
                // TODO Auto-generated method stub
                System.out.println("in onPrepared");
            }
        });
mp.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mediaPlayer) {
                // TODO Auto-generated method stub
                pausePressed=1;
                getNextSong();
            }
        });
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
try{
      System.out.println("in try");
      playSong(0);
 }
 catch(Exception e){
      System.out.println("in catch and exception is "+e.getMessage());
 }

    }

    public void playSong(int index){

        // TODO Auto-generated method stub
        try{
            System.out.println("in playsong");
            mp.reset();
            String p=songs.get(index).songData;
        System.out.println("Song title is"+songs.get(1).songTitle+"artist"+songs.get(1).songArtist+"composer is"+songs.get(1).songComposer.valueOf(0)+"title is"+songs.get(1).title);
        mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
     GetMusic.tv1.setText(songs.get(index).title);
GetMusic.tv2.setText(songs.get(index).album);
    GetMusic.tv3.setText(songs.get(index).songArtist);
    GetMusic.tv3.append(songs.get(index).album);
        mp.setDataSource(p);
        MediaMetadataRetriever mmr = new MediaMetadataRetriever();
        byte[] rawArt;
        Bitmap art = null;
        BitmapFactory.Options bfo=new BitmapFactory.Options();
      mmr.setDataSource(p);

        rawArt = mmr.getEmbeddedPicture();



        if (null != rawArt) 
            art = BitmapFactory.decodeByteArray(rawArt, 0, rawArt.length, bfo);
    GetMusic.img.setImageBitmap(art);
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();;
        } catch (SecurityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "exception is"+e.toString(), Toast.LENGTH_SHORT).show();
            Log.d("exc","exception is"+e.toString());
            System.out.println("exception is"+e.toString());
        }
        try {
            mp.prepare();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "prepate exception is"+e.toString(), Toast.LENGTH_SHORT).show();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), "prepate exception is"+e.toString(), Toast.LENGTH_SHORT).show();
            System.out.println("exception is"+e.toString());
        }

        mp.start();
        GetMusic.sb.setMax(mp.getDuration());
        seekUpdation();
GetMusic.sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
            GetMusic.seekhandler.removeCallbacks(run);
            mp.seekTo(seekBar.getProgress());
            GetMusic.seekhandler.postDelayed(run, 1000);
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                GetMusic.seekhandler.removeCallbacks(run);

            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser) {
                // TODO Auto-generated method stub

            }
        });



    }
     Runnable run = new Runnable() {

            @Override
            public void run() {
                seekUpdation();
            }
        };
     public void seekUpdation() {

            GetMusic.sb.setProgress(mp.getCurrentPosition());
            GetMusic.seekhandler.postDelayed(run, 1000);
        }
    public int getCurrentIndex(){
        return currentIndex;
    }

    public void mediaPlayerPause()
    {

        if(mp!=null)
        {

            mp.pause();
            //pos=mediaPlayer.getCurrentPosition();
        }

    }
    public void mediaPlayerResume()
    {

        if(mp!=null&&!mp.isPlaying())
        {
            mp.seekTo(mp.getCurrentPosition());
            mp.start();
        }
    }
    public void getPreviousSong()
    {

        if(currentIndex==0)
            currentIndex=songs.size()-1;
        else{
            currentIndex=currentIndex-1;
            }
        playSong(currentIndex);
    }
    public void getNextSong() {
        // TODO Auto-generated method stub

        if(currentIndex == songs.size()-1){
            currentIndex=0;
        }
        else
        {
            currentIndex=currentIndex+1;


        }
        playSong(currentIndex);
    }


    @Override   
    public int onStartCommand(Intent intent, int flags, int startId) 
    {   
        mp.start(); 

        return 0;

    }

    @Override   
    public void onDestroy() 
    {   
        mp.release();       
        super.onDestroy();

    }

}

import java.io.IOException；
导入java.util.ArrayList；
导入com.example.getmusic.PlayMusicService.LocalBinder；
导入android.media.AudioManager；
导入android.media.MediaMetadataRetriever；
导入android.media.MediaPlayer；
导入android.media.MediaPlayer.OnCompletionListener；
导入android.media.MediaPlayer.OnPreparedListener；
导入android.net.Uri；
导入android.os.AsyncTask；
导入android.os.Bundle；
导入android.os.Handler；
导入android.os.IBinder；
导入android.provider.MediaStore；
导入android.provider.MediaStore.Audio；
导入android.app.Activity；
导入android.content.BroadcastReceiver；
导入android.content.ComponentName；
导入android.content.Context；
导入android.content.Intent；
导入android.content.ServiceConnection；
导入android.content.res.Configuration；
导入android.database.Cursor；
导入android.graphics.Bitmap；
导入android.graphics.BitmapFactory；
导入android.telephony.TelephonyManager；
导入android.util.Log；
导入android.view.GestureDetector；
导入android.view.GestureDetector.OnTestureListener；
导入android.view.Menu；
导入android.view.MotionEvent；
导入android.view.view；
导入android.view.view.OnClickListener；
导入android.widget.Button；
导入android.widget.ImageView；
导入android.widget.SeekBar；
导入android.widget.TextView；
导入android.widget.Toast；
导入android.widget.SeekBar.onseekbarchaneglistener；
公共类GetMusic扩展活动在EstureListener上实现{
静态处理程序seekhandler=新处理程序（）；
布尔值isServiceConnected=false；
播放音乐服务播放服务；
静态文本视图tv1、tv2、tv3；
按钮“上一步”、“下一步”；静态图像视图img；静态手势检测器GD检测器；
int pausePressed=1；静态SeekBar sb；
int currentIndex=0；游标游标；GenericSongClass GSC；
静态媒体播放器；
专用ServiceConnection conn=新ServiceConnection（）{
@凌驾
ServiceDisconnected上的公共无效（组件名称）{
//TODO自动生成的方法存根
isServiceConnected=false；
}
@凌驾
服务连接上的公共无效（组件名称，IBinder服务）{
//TODO自动生成的方法存根
LocalBinder=（LocalBinder）服务；
playServ=binder.getService（）；
isServiceConnected=true；
}
};
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u get\u music）；
gDetector=新的GestureDetector（本）；
tv1=（TextView）findViewById（R.id.textView1）；
tv2=（TextView）findViewById（R.id.textView2）；
tv3=（TextView）findViewById（R.id.textView3）；
getSongs（）；
img=（ImageView）findViewById（R.id.imageView1）；
sb=（SeekBar）findviewbyd（R.id.seekBar1）；
试一试{
Intent serv=新Intent（这是PlayMusicService.class）；
bindService（serv、conn、Context.BIND\u AUTO\u CREATE）；
System.out.println（“尝试呼叫服务”）；
startService（serv）；
}
捕获（例外e）{
System.out.println（“异常为”+e）；
}
System.out.println（“绑定后”）；
/* 
试一试{
播放歌曲（0）；
}
捕获（例外e）{
System.out.println（“异常为”+e）；
}*/
//播放音乐p=新播放音乐（）；
//p.execute（）；
}
@凌驾
受保护的void onStop（）{
//TODO自动生成的方法存根
super.onStop（）；
如果（IServiceConnected）{
开放服务（康涅狄格州）；
isServiceConnected=false；
}
}
公共静态void mediaPlayerPause（）
{
如果（mediaPlayer！=null）
{
mediaPlayer.pause（）；
posofaudiotrack=mediaPlayer.getCurrentPosition（）；
}
}
public void mediaPlayerResume（）
{
if（mediaPlayer！=null&&！mediaPlayer.isPlaying（））
{
mediaPlayer.seekTo（mediaPlayer.getCurrentPosition（））；
mediaPlayer.start（）；
}
}
公共类播放音乐任务
{
@凌驾
受保护的Void doInBackground（Void…参数）{
//TODO自动生成的方法存根
getSongs（）；
返回null；
}
}
@凌驾
公共无效OnConfiguration已更改（配置newConfig）{
//TODO自动生成的方法存根
super.onConfigurationChanged（newConfig）；
}
公共静态ArrayList歌曲=null；
public void getSongs（）{
Toast.makeText（getApplicationContext（），“in BindAllSongs（）”，Toast.LENGTH_SHORT）.show（）；
字符串选择=MediaStore.Audio.Media.IS_MUSIC+“！=0”；
最终字符串[]投影=新字符串[]{
MediaStore.Audio.Media.DISPLAY\u名称，
MediaStore.Audio.Media.ARTIST，
MediaStore.Audio.Media.DATA，MediaStore.Audio.Media.COMPOSER，MediaStore.Audio.Media.TITLE，MediaStore.Audio.Media.ALBUM
};
最终字符串排序器=MediaStore.Audio.AudioColumns.TITLE
+“整理本地化ASC”；
试一试{
Uri Uri=android.provider.MediaStore.Audio.Media.EXTERNAL\u CONTENT\u Uri；
游标=getBaseContext（）.getContentResolver（）.query（uri，
投影、选择、空值、排序器）；
/*int column_index=cursor.getColumnIndexOrThrow（MediaStore.Audio.Media.DATA）；
字符串s=cursor.getString（列索引）*/
//Toast.makeText（getApplica