Android 要在viewpager滑动上播放声音吗

我正在开发一款android应用程序，它可以在图像被滑动时播放背景声音。我已经阅读了多个教程并找到了代码&我也尝试了同样的方法，但对我来说不起作用。这是我试过的代码

package com.android.learning_numbers;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class Numbers extends Activity {

    private static final OnPageChangeListener change = null;
    public static MediaPlayer mp = null;

    @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_numbers);
         ViewPager viewPager = (ViewPager)findViewById(R.id.view_pager);
         ImagePagerAdapter adapter = new ImagePagerAdapter();
         viewPager.setAdapter(adapter);
         viewPager.setOnPageChangeListener(change);}

     private class ImagePagerAdapter extends PagerAdapter {

         private int[] mImages = new int[] {R.drawable.sun,R.drawable.sky,R.drawable.moon,};


         private int[] mAudio= new int[]{R.raw.sun,R.raw.sky,R.raw.moon,};
         @Override
         public int getCount() {
         return mImages.length;
           }
         @Override
         public boolean isViewFromObject(View view, Object object) {
            return view == ((ImageView) object);
               }
         @Override
         public Object instantiateItem(ViewGroup container, int position) {
            Context context = Numbers.this;
            ImageView imageView = new ImageView(context);
            int padding =context.getResources().  
            getDimensionPixelSize(R.dimen.activity_vertical_margin);
            imageView.setPadding(padding, padding, padding, padding);
            imageView.setScaleType(ImageView.ScaleType.CENTER);
            imageView.setImageResource(mImages[position]);
            ((ViewPager) container).addView(imageView, 0); 
            return imageView;
            }

         public OnPageChangeListener change = new OnPageChangeListener() {

             @Override public void onPageSelected(int position) {
                 Log.d(ACTIVITY_SERVICE, "OnPageSelected");
                 if 

                 (mp != null) {
                  mp.reset();
                  mp.release();
                 }
                 mp = MediaPlayer.create(Numbers.this, mAudio[position]);
                 mp.start();
             }
             @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
             @Override public void onPageScrollStateChanged(int state) {}
            };



         @Override
         public void destroyItem(ViewGroup container, int position, Object object) {
           ((ViewPager) container).removeView((ImageView) object);
         }
     }
     }

---

正如我在这里所想，在图像滑动时，类不会调用声音。我的代码有错误吗？因为这里的OnPageChangeListener根本不适合我。解决这个问题的办法是什么？如何修改适合我的声音代码？

尝试此代码并根据需要进行更改。。它对我有用

public class Alphabets extends Activity {

    MediaPlayer mp;
    MediaPlayer BG;




    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_numbers);
        ViewPagerAdapter adapter = new ViewPagerAdapter(this, imageArra);
        ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager);
        myPager.setOnPageChangeListener(player);
        myPager.setAdapter(adapter);
        myPager.setCurrentItem(0);
        BG = MediaPlayer.create(this, R.raw.jingle);
        BG.setLooping(true);
        BG.setVolume(100, 100);
        BG.start();
        mp = MediaPlayer.create(Alphabets.this, mAudio[0]);
        mp.start();
}

    @Override
    protected void onPause() {
        super.onPause();
        BG.pause();
        }

    @Override
    protected void onResume() {
    super.onResume();
    BG.start();
    }

    private int[] mAudio = new int[]{R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,
                                     R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,R.raw.one,};

    private int imageArra[] =  {R.drawable.ab,R.drawable.bc,R.drawable.cd,R.drawable.de,R.drawable.ef,R.drawable.fg,R.drawable.gh,R.drawable.hi,R.drawable.ij,R.drawable.jk,R.drawable.kl,R.drawable.lm,R.drawable.mn,
                                R.drawable.no,R.drawable.op,R.drawable.pq,R.drawable.qr,R.drawable.rs,R.drawable.st,R.drawable.tu,R.drawable.uv,R.drawable.vw,R.drawable.wx,R.drawable.xy,R.drawable.yz,R.drawable.zz};

    public  OnPageChangeListener player = new OnPageChangeListener()
    {

        @Override
        public void onPageSelected(int arg1)
        {
        mp = MediaPlayer.create(Alphabets.this, mAudio[arg1]);
        mp.stop();
        }

        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2)
        {
        }

        @Override
        public void onPageScrollStateChanged(int arg0)
        {
        }
    };

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.numbers, menu);
        return true;
    }

}