<?xml version="1.0" encoding="utf-8"?>
<manifest package="app.android.elfplayer" xmlns:android="http://schemas.android.com/apk/res/android" android:versioncode="1" android:versionname="1.0">
  <uses -sdk="" android:minsdkversion="7">
  <uses -permission="" android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses>

  <application android:label="@string/app_name" android:icon="@drawable/icon">
    <activity android:name=".CoverActivity">
      <intent -filter="">
        <action android:name="android.intent.action.MAIN">
        <category android:name="android.intent.category.LAUNCHER">
      </category></action></intent>
    </activity>
    <activity android:name=".PlayerActivity">
    </activity>
    <service android:name=".MusicService" android:enabled="true">
    </service>
  </application>

</uses></manifest>

package app.android.elfplayer;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;
import android.view.WindowManager;

public class CoverActivity extends Activity {
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.cover);

    new Handler().postDelayed(new Runnable(){

     @Override
     public void run() {
      Intent mainIntent = new Intent(CoverActivity.this,PlayerActivity.class);
      CoverActivity.this.startActivity(mainIntent);
      CoverActivity.this.finish();
     }

    }, 2000);

  }
}

package app.android.elfplayer;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.RemoteException;
import android.util.Log;
import android.view.View;
import android.widget.ImageButton;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class PlayerActivity extends Activity {

  public static final int PLAY = 1;
  public static final int PAUSE = 2;

  ImageButton imageButtonFavorite;
  ImageButton imageButtonNext;
  ImageButton imageButtonPlay;
  ImageButton imageButtonPre;
  ImageButton imageButtonRepeat;
  SeekBar musicSeekBar;

  IServicePlayer iPlayer;
  boolean isPlaying = false;
  boolean isLoop = false;  

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.player);

    imageButtonFavorite = (ImageButton) findViewById(R.id.imageButtonFavorite);
    imageButtonNext = (ImageButton) findViewById(R.id.imageButtonNext);
    imageButtonPlay = (ImageButton) findViewById(R.id.imageButtonPlay);
    imageButtonPre = (ImageButton) findViewById(R.id.imageButtonPre);
    imageButtonRepeat = (ImageButton) findViewById(R.id.imageButtonRepeat);
    musicSeekBar = (SeekBar) findViewById(R.id.musicSeekBar);

    bindService(new Intent(PlayerActivity.this, MusicService.class), conn, Context.BIND_AUTO_CREATE);
    startService(new Intent(PlayerActivity.this, MusicService.class));

    imageButtonPlay.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        Log.i("yao", "imageButtonPlay -> onClick");

        if (!isPlaying) {
          try {
            iPlayer.play();
          } catch (RemoteException e) {
            e.printStackTrace();
          }
          imageButtonPlay.setBackgroundResource(R.drawable.pause_button);
          isPlaying = true;

        } else {
          try {
            iPlayer.pause();
          } catch (RemoteException e) {
            e.printStackTrace();
          }
          imageButtonPlay.setBackgroundResource(R.drawable.play_button);
          isPlaying = false;
        }
      }
    });

    musicSeekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

      @Override
      public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
      }

      @Override
      public void onStartTrackingTouch(SeekBar seekBar) {
      }

      @Override
      public void onStopTrackingTouch(SeekBar seekBar) {
        if (iPlayer != null) {
          try {
            iPlayer.seekTo(seekBar.getProgress());
          } catch (RemoteException e) {
            e.printStackTrace();
          }
        }
      }
    });

    handler.post(updateThread);
  }

  private ServiceConnection conn = new ServiceConnection() {
    public void onServiceConnected(ComponentName className, IBinder service) {
      Log.i("yao", "ServiceConnection -> onServiceConnected");
      iPlayer = IServicePlayer.Stub.asInterface(service);
    }

    public void onServiceDisconnected(ComponentName className) {
    };
  };

  Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
    };
  };

  private Runnable updateThread = new Runnable() {
    @Override
    public void run() {
      if (iPlayer != null) {
        try {
          musicSeekBar.setMax(iPlayer.getDuration());
          musicSeekBar.setProgress(iPlayer.getCurrentPosition());
        } catch (RemoteException e) {
          e.printStackTrace();
        }
      }
      handler.post(updateThread);
    }
  };

}

package app.android.elfplayer;
interface IServicePlayer{
  void play();
  void pause();
  void stop();
  int getDuration();
  int getCurrentPosition();
  void seekTo(int current);
  boolean setLoop(boolean loop);
}

package app.android.elfplayer;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;

public class MusicService extends Service {

  String tag = "yao";

  public static MediaPlayer mPlayer;

  public boolean isPause = false;

  IServicePlayer.Stub stub = new IServicePlayer.Stub() {

    @Override
    public void play() throws RemoteException {
      mPlayer.start();
    }

    @Override
    public void pause() throws RemoteException {
      mPlayer.pause();
    }

    @Override
    public void stop() throws RemoteException {
      mPlayer.stop();
    }

    @Override
    public int getDuration() throws RemoteException {
      return mPlayer.getDuration();
    }

    @Override
    public int getCurrentPosition() throws RemoteException {
      return mPlayer.getCurrentPosition();
    }

    @Override
    public void seekTo(int current) throws RemoteException {
      mPlayer.seekTo(current);
    }

    @Override
    public boolean setLoop(boolean loop) throws RemoteException {
      return false;
    }

  };

  @Override
  public void onCreate() {
    Log.i(tag, "MusicService onCreate()");
    mPlayer = MediaPlayer.create(getApplicationContext(), ElfPlayerUtil.getFileinSD("wind.mp3"));
  }

  @Override
  public IBinder onBind(Intent intent) {
    return stub;
  }

}