想要在 viewpager 上播放声音 滑动

问题描述

我正在开发 android 应用程序，该应用程序可以在图像滑动时播放背景声音.我经历了多个教程&找到代码 &我尝试了同样的方法，但它对我不起作用.这是我尝试过的代码..

i am working on android app which can play background sound whenever image is swipes. I have gone through multiple tutorials & found codes & i tried for the same but it won't work for me. Here is my code which i tried..

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);
         }
     }
     }

我认为这里的声音不是由图像滑动类调用的.我的代码有错误吗?因为这里 OnPageChangeListener 根本不适合我.解决方案是什么?如何修改适合我的声音代码?

As i think here sound is not called by class on image swipe. Is there any error in my code? Because here OnPageChangeListener is not working for me at all. What is the solution for this? How do i modify my sound code that works for me?

推荐答案

试试这个代码 &根据您的需要进行更改..它对我有用..

Try this code & make changes according to your needs.. It works for me..

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;
    }

}

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