ViewPager 滑动上一个声音 [英] ViewPager swipe previous sound

问题描述

在这里我使用 viewpager 来滑动我的图像 &它在每次图像滑动时播放不同的声音.现在它工作正常但是当我向后滑动时声音与图像不匹配...

Here i am using viewpager to swipe my images & it plays different sound on each image swipe. Now Its working fine but when i swipe back the sound does not match the image...

我的代码:-

图像页面适配器

package com.android.learning_numbers;

public class ImagePagerAdapter {

}

主要活动

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.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class Numbers extends Activity {

    MediaPlayer mp;
    MediaPlayer player;

    @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);
        player = MediaPlayer.create(this, R.raw.jingle);
        player.setLooping(true);
        player.setVolume(100, 100);
        player.start();
     }

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

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

private class ImagePagerAdapter extends PagerAdapter {

         private int[] mImages = new int[] {R.drawable.no1,R.drawable.no2,R.drawable.no3,R.drawable.no4,R.drawable.no5,R.drawable.no6,R.drawable.no7,R.drawable.no8,R.drawable.no9,R.drawable.no10,R.drawable.bg2,};
         private int[] mAudio = new int[]{R.raw.one,R.raw.two,R.raw.three,R.raw.four,R.raw.five,R.raw.six,R.raw.seven,R.raw.eight,R.raw.nine,R.raw.ten,R.raw.one,};

         @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); 
            if(position>=1){
            mp = MediaPlayer.create(Numbers.this, mAudio[position-1]);
            mp.start();
            }
            return imageView;
         }

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

推荐答案

我找到了答案.现在这是绝对有效的代码

I found my answer. Now this is the code which definitely work

public class Numbers 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(Numbers.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.two,
                                     R.raw.three,
                                     R.raw.four,
                                     R.raw.five,
                                     R.raw.six,
                                     R.raw.seven,
                                     R.raw.eight,
                                     R.raw.nine,
                                     R.raw.ten};

    private int imageArra[] =  {R.drawable.no1,
                                R.drawable.no2,
                                R.drawable.no3,
                                R.drawable.no4,
                                R.drawable.no5,
                                R.drawable.no6,
                                R.drawable.no7,
                                R.drawable.no8,
                                R.drawable.no9,
                                R.drawable.no10};

    public  OnPageChangeListener player = new OnPageChangeListener()
    {

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

        @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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