请问下面这个音乐播放的Service怎么在activity怎么调用
李元静 HarmonyOS领域优质创作者 博客专家认证 2015-05-10 02:40:41 package com.example.musicmedia;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.IBinder;
import java.io.IOException;
import java.util.concurrent.ConcurrentLinkedQueue;
public class MyMusicPlayer extends Service implements
MediaPlayer.OnCompletionListener {
public static final String ACTION_ADD_TO_QUEUE = "com.aptl.services.ADD_TO_QUEUE";
private ConcurrentLinkedQueue<Uri> mTrackQueue;
private MediaPlayer mMediaPlayer;
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
mMediaPlayer=new MediaPlayer();
mTrackQueue = new ConcurrentLinkedQueue<Uri>();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
String action = intent.getAction();
if (ACTION_ADD_TO_QUEUE.equals(action)) {
Uri trackUri = intent.getData();
addTrackToQueue(trackUri);
}
return START_NOT_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
private void addTrackToQueue(Uri trackUri) {
if (mMediaPlayer == null) {
try {
mMediaPlayer = MediaPlayer.create(this, trackUri);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (Exception e) {
stopSelf();
}
} else {
mTrackQueue.offer(trackUri);
}
}
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.reset();
Uri nextTrackUri = mTrackQueue.poll();
if (nextTrackUri != null) {
try {
mMediaPlayer.setDataSource(this, nextTrackUri);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IOException e) {
stopSelf();
}
} else {
stopSelf();
}
}
}