如何使用服务控制媒体播放器？

Question

我正在制作mp3播放器。我的设备中有歌曲的lisview。我想通过服务控制音乐播放器。当任何用户单击任何歌曲时，！song都会播放，并且还可以停止下一首和上一首的暂停。显示的进度我希望所有这些功能都可以通过服务实现

怎么可能？

package music.player.musicplayer;

import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.database.Cursor;
import android.net.Uri;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.MediaController;
import android.widget.RelativeLayout;
import android.widget.SeekBar;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class MainActivity extends AppCompatActivity {
    private ArrayList<Song> songList;
    private ListView songView;
    LinearLayout nextactivity;
    SeekBar seekBar;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        songView = findViewById(R.id.song_list);
        songList = new ArrayList<Song>();
        seekBar = findViewById(R.id.seekBar2);
        getSongList();

        Collections.sort(songList, new Comparator<Song>() {
            public int compare(Song a, Song b) {
                return a.getTitle().compareTo(b.getTitle());
            }
        });
        SongAdapter songAdt = new SongAdapter(this, songList);

        songView.setAdapter(songAdt);
    }


    //song info method retrieve
    public void getSongList() {
        //retrieve song info
        ContentResolver musicResolver = getContentResolver();
        Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);
        if (musicCursor != null && musicCursor.moveToFirst()) {
            //get columns
            int titleColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.TITLE);
            int idColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media._ID);
            int artistColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.ARTIST);
            int dataColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.DATA);


            //add songs to list
            do {
                long thisId = musicCursor.getLong(idColumn);
                String thisTitle = musicCursor.getString(titleColumn);
                String thisArtist = musicCursor.getString(artistColumn);
                String thisPath = musicCursor.getString(dataColumn);

                songList.add(new Song(thisId, thisTitle, thisArtist, thisPath));
            }
            while (musicCursor.moveToNext());
        }
    }
}