package com.example.yc.musicbox;import android.app.Activity;
import android.app.Service;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.Environment;
import android.os.IBinder;
import android.os.Parcel;
import android.os.RemoteException;
//import android.support.v4.app.ActivityCompat;
import android.widget.Toast;import java.io.File;import static android.os.Environment.DIRECTORY_MUSIC;public class MusicService extends Service {public static MediaPlayer mp = new MediaPlayer();//音乐File myfile=new File(Environment.getExternalStorageDirectory(),"Jony J - Team Work.mp3");public MusicService() {try {mp.setDataSource(myfile.getPath());mp.prepare();mp.setLooping(true);} catch (Exception e) {e.printStackTrace();}}private IBinder mBinder = new MyBinder();@Overridepublic IBinder onBind(Intent intent) {// 必须实现的接口return mBinder;}public class MyBinder extends Binder{@Overrideprotected boolean onTransact(int code, Parcel data, Parcel reply, int flags) throws RemoteException {switch (code) {case 101://“还未播放”状态，点击开始播放
                    mp.start();break;case 102://“正在播放”状态，点击暂停
                    mp.pause();break;case 103://“正在暂停”状态，点击继续播放
                    mp.start();break;case 104://点击停止，进度条归零
                    mp.stop();try {mp.prepare();mp.seekTo(0);} catch (Exception e) {e.printStackTrace();}break;}return super.onTransact(code, data, reply, flags);}}}

    public void service_connection() {mConnection = new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {mBinder = service;}@Overridepublic void onServiceDisconnected(ComponentName name) {mConnection = null;}};Intent intent = new Intent(this, MusicService.class);startService(intent);bindService(intent, mConnection, Context.BIND_AUTO_CREATE);}

 public void update() {new Thread(new Runnable() {@Overridepublic void run() {while (true) {try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}handler.obtainMessage(123).sendToTarget();}}}).start();handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);switch (msg.what) {case 123://UI更新
                        progressTime.setText(t.format(MusicService.mp.getCurrentPosition()));seekBar.setProgress(MusicService.mp.getCurrentPosition());break;default:break;}}};}

 seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {if (fromUser) {MusicService.mp.seekTo(seekBar.getProgress());}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});}