求大神指点迷津。附源代码及小弟的膝盖！

Question

//MainActivity

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
private SeekBar seekBar;
private TextView textView;
private Intent intent;
private boolean isPlay = false;
private MyReceiver receiver;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    seekBar = (SeekBar) findViewById(R.id.seekbar);
    textView = (TextView) findViewById(R.id.tv);

    intent = new Intent(this, PlayService.class);

    receiver = new MyReceiver();
    registerReceiver(receiver, new IntentFilter(Config.ACTION_PLAY_PRG));

    event();


}

private void event() {
    seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            int progress = seekBar.getProgress();

            Intent intent = new Intent(Config.ACTION_PLAY_SEEK);
            intent.putExtra(Config.EXTRA_CURRENT, progress);
            sendBroadcast(intent);


        }
    });
}

public void playMusic(View view) {
    Button button = (Button) view;
    if (!isPlay) {
        button.setText("暂停");
    } else {
        button.setText("播放");
    }
    isPlay = !isPlay;
    startService(intent);

}

public void stopMusic(View view) {

    stopService(intent);
    seekBar.setProgress(0);

}

@Override
protected void onDestroy() {
    unregisterReceiver(receiver);
    super.onDestroy();
}

class MyReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        int maxLen = intent.getIntExtra(Config.EXTRA_MAX, 0);
        int curProgress = intent.getIntExtra(Config.EXTRA_CURRENT, 0);
        seekBar.setMax(maxLen);
        seekBar.setProgress(curProgress);
        StringBuilder stringBuilder = new StringBuilder();

        int m = curProgress / 1000 / 60;
        int s = curProgress / 1000 % 60;

        int maxM = maxLen / 1000 / 60;
        int maxS = maxLen / 1000 % 60;

        stringBuilder.append(m / 10).append(m % 10)
                .append(":").append(s / 10).append(s % 10)
                .append("/").append(maxM / 10).append(maxM % 10)
                .append(":")
                .append(maxS / 10).append(maxS % 10);
        textView.setText(stringBuilder.toString());
    }
}

}

//PlayService

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.system.Os;

/**

• Created by Administrator on 2016/7/25 0025.
  */
  public class PlayService extends Service{
  private MediaPlayer mediaPlayer;
  private MySeekReceiver receiver;

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

  @Override
  public void onCreate() {
  super.onCreate();

  mediaPlayer=MediaPlayer.create(PlayService.this,R.raw.music);
  receiver=new MySeekReceiver();
  registerReceiver(receiver,new IntentFilter(Config.ACTION_PLAY_SEEK));
  

  }

  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
  if(mediaPlayer.isPlaying()){
  mediaPlayer.pause();
  }else {
  mediaPlayer.start();
  }
  new MyThread().start();
  return super.onStartCommand(intent, flags, startId);
  }

  @Override
  public void onDestroy() {
  super.onDestroy();
  mediaPlayer.stop();
  mediaPlayer.release();
  unregisterReceiver(receiver);
  }

  class MySeekReceiver extends BroadcastReceiver{
  @Override
  public void onReceive(Context context, Intent intent) {
  int seekProgress=intent.getIntExtra(Config.EXTRA_CURRENT,0);
  if(mediaPlayer!=null){
  mediaPlayer.seekTo(seekProgress);
  }
  }
  }

  class MyThread extends Thread{
  @Override
  public void run() {
  super.run();
  int maxLen=mediaPlayer.getDuration();//获取总长度
  while (mediaPlayer != null && mediaPlayer.isPlaying()) {
  int progress=mediaPlayer.getCurrentPosition();
  Intent intent=new Intent(Config.ACTION_PLAY_PRG);
  intent.putExtra(Config.EXTRA_MAX,maxLen);
  intent.putExtra(Config.EXTRA_CURRENT,progress);
  sendBroadcast(intent);
  }
  }
  }
  }

Answer 1

http://lovelease.iteye.com/blog/2105616