bounty还有5天到期。回答此问题可获得+100声望奖励。Sudarshan Taparia正在寻找规范答案。

我试图在Android上做一个井字游戏。它也有几个变种。我已经创建了一个后台服务类。相同的代码如下。

package com.sudarshan.tictactoenew;

import android.content.Intent;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.os.IBinder;
import android.app.Service;
import android.util.Log;

public class BackgroundSoundService extends Service {
    private static final String TAG = null;
   // Intent intent;

    MediaPlayer mp;
    public IBinder onBind(Intent arg0) {

        return null;
    }
    @Override
    public void onCreate() {
        super.onCreate();

    }
    public int onStartCommand(Intent intent, int flags, int startId) {

         mp = new MediaPlayer();

        Bundle extras = intent.getExtras();
        String itemname = (String) extras.get("itemname");
        Log.i("Itemname",itemname);
        if(itemname.equals("menupage"))
        {

            String filename = "android.resource://" + this.getPackageName() + "/raw/got";

            try {
                mp.setDataSource(this, Uri.parse(filename));
                mp.prepareAsync();
                mp.setLooping(true); // Set looping
                mp.setVolume(100,100);
                mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mp) {
                        mp.start();
                    }
                });
                    ;
            } catch(Exception e){
                e.printStackTrace();
            }
            // = MediaPlayer.create(this, R.raw.got);

           // player1.start();
        }
        else if(itemname.equals("classictictactoe"))
        {

            Log.i("Inside","Inside classic tic tac toe");
            String filename = "android.resource://" + this.getPackageName() + "/raw/cof";

            try {
                mp.setDataSource(this, Uri.parse(filename));
                mp.prepareAsync();
                mp.setLooping(true); // Set looping
                mp.setVolume(100,100);
                mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mp) {

                        mp.start();
                    }
                });
                
            } catch(Exception e){
                e.printStackTrace();
            }
            
        }

        return startId;
    }

    public void onStart(Intent intent, int startId) {
        // TO DO
    }
    public IBinder onUnBind(Intent arg0) {
        // TO DO Auto-generated method
        return null;
    }

    public void onStop() {

    }
    public void onPause() {

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

    }

    @Override
    public void onLowMemory() {

    }
}

这段代码不会被执行Log.i（“Inside”，“Inside classic tic tac toe”）;下面是我的部分日志文件

2022-10-02 21:44:36.475 13019-13019 Itemname                com.sudarshan.tictactoenew           I  menupage
2022-10-02 21:45:01.080 13019-13019 Itemname                com.sudarshan.tictactoenew           I  classictictactoe
2022-10-02 21:57:39.288 13019-13019 Itemname                com.sudarshan.tictactoenew           I  menupage
2022-10-02 21:57:46.764 13019-13019 Itemname                com.sudarshan.tictactoenew           I  classictictactoe
2022-10-02 21:57:57.114 13019-13019 Itemname                com.sudarshan.tictactoenew           I  menupage
2022-10-02 21:58:03.626 13019-13019 Itemname                com.sudarshan.tictactoenew           I  menupage
2022-10-02 21:58:08.837 13019-13019 Itemname                com.sudarshan.tictactoenew           I  classictictactoe
---------------------------- PROCESS ENDED (13019) for package com.sudarshan.tictactoenew ----------------------------
---------------------------- PROCESS STARTED (13341) for package com.sudarshan.tictactoenew ----------------------------
---------------------------- PROCESS ENDED (13341) for package com.sudarshan.tictactoenew ----------------------------
---------------------------- PROCESS STARTED (13430) for package com.sudarshan.tictactoenew ----------------------------
2022-10-02 21:59:31.086 13430-13430 Itemname                com.sudarshan.tictactoenew           I  menupage
2022-10-02 21:59:36.137 13430-13430 Itemname                com.sudarshan.tictactoenew           I  classictictactoe

menupage和classictictacttoe都是活动。每当活动打开时都应播放音乐（menupage和classictacttoe），但当活动classictacttoe打开时不播放音乐，音乐仅在menupage活动打开时播放
//classictactoe活动的相关代码部分

Intent  intent = new Intent(ClassicTicToe.this, BackgroundSoundService.class);
        intent.putExtra("itemname","classictictactoe");
        startService(intent);

//menupage活动的相关代码部分

i = new Intent(MenuPage.this, BackgroundSoundService.class);
       i.putExtra("itemname","menupage");
        startService(i);

我不明白为什么音乐在两个活动中都不播放
我有音乐文件cof.mp3和got.mp3在原始文件夹