Android缩略图切换大图，包含RecyclerView和Viewpager联动

最近产品提出了需要做个缩略图展示大图，结合viewpager和recyclerview使用，下面上效果图：

       

这里包含了显示在线网络图片，点击缩略图条目跳转到另一个页面展示大图，PhotoView双击放大缩小，单击消失，滑动viewpager页面联动底部的recyclerview条目以及点击底部条目上面的大图跟随着切换位置。下面请看主要代码讲解：

picList = new ArrayList<>();
picList.add("http://old.bz55.com/uploads/allimg/140416/1-140416100A3.jpg");
picList.add("http://pic1.win4000.com/wallpaper/3/58ae554aa36f2.jpg");
picList.add("http://img.ivsky.com/img/bizhi/pre/201601/27/february_2016-003.jpg");
picList.add("http://img.ivsky.com/img/bizhi/pre/201601/27/february_2016-004.jpg");
picList.add("http://img.ivsky.com/img/tupian/pre/201511/16/chongwugou.jpg");
picList.add("http://p0.so.qhimgs1.com/bdr/_240_/t01b5c4bd41707c827a.jpg");
picList.add("http://p2.so.qhimgs1.com/bdr/_240_/t01fafa8a942238b06e.jpg");
listview = (ListView) findViewById(R.id.listview);
ListAdapter adapter = new ListAdapter(MainActivity.this,picList);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {
        //点击每个小图弹出大图页面
        initPopuWindow(position);
    }
});

弹出显示大图的页面包含viewpager,recyclerView,PhotoView以及对应的adapter

private void initPopuWindow(int position) {
    view = LayoutInflater.from(this).inflate(R.layout.activity_image, null,false);
    selectPopupWindow = new PopupWindow(view);
    selectPopupWindow.setWidth(ViewGroup.LayoutParams.MATCH_PARENT);
    selectPopupWindow.setHeight(ViewGroup.LayoutParams.MATCH_PARENT);
    mViewPager = (ViewPager)view.findViewById(R.id.view_pager);
    tv_img_current_index = (TextView)view.findViewById(R.id.tv_img_current_index);
    tv_img_count = (TextView)view.findViewById(R.id.tv_img_count);
    iv_back = (ImageView) view.findViewById(R.id.iv_back);
    recyclerview = (RecyclerView) view.findViewById(R.id.recyclerview);
    tv_img_count.setText(picList.size() + "");
    int size = picList.size();
    ArrayList imageViews = new ArrayList<>();

    for (int i = 0; i < size; i++) {
        photoview = new PhotoView(this);
        imageViews.add(photoview);
        photoview.isEnabled();
        photoViewDismiss();
    }
    selectPopupWindow.setBackgroundDrawable(new BitmapDrawable());
    selectPopupWindow.showAsDropDown(view);
    //创建viewpager的adapter
    ViewPagerAdapter myImagPagerAdapter = new ViewPagerAdapter(MainActivity.this,imageViews,picList);
    mViewPager.setAdapter(myImagPagerAdapter);
    mViewPager.setCurrentItem(position);
    //创建底部横向滚动的adapter
    final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this,LinearLayoutManager.HORIZONTAL,false);
    recyclerview.setLayoutManager(linearLayoutManager);
    horizontalAdapter = new HorizontalAdapter(MainActivity.this,picList);
    recyclerview.setAdapter(horizontalAdapter);
    initViewPager();
    //初始化设置数据，联动作用
    tv_img_current_index.setText("" + (position + 1));
    recyclerview.scrollToPosition(position);
    horizontalAdapter.setBg(position);
}

接下来滑动viewpager时上面的数量以及recyclerview条目跟着联动

mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
    @Override
    public void onPageSelected(int position) {
        tv_img_current_index.setText("" + (position + 1));
        recyclerview.smoothScrollToPosition(position);
        photoViewDismiss();
        horizontalAdapter.setBg(position);
    }
});

recyclerview条目点击需要自定义，创建回调接口，adapter设置，点击item条目时将位置传递给viewpager，上下一起联动，如果选中设置背景。

horizontalAdapter.setOnItemClickListener(new HorizontalAdapter.OnItemClickListener() {
    @Override
    public void onItemClickListener(View view, int position) {
        mViewPager.setCurrentItem(position);
    }
});

if(position == pos){
    myHolder.iv.setBackground(context.getDrawable(R.drawable.shap_devider));
}else {
    myHolder.iv.setBackground(null);
}

Glide.with(context)
        .load(list.get(position))
        .asBitmap()
        .diskCacheStrategy(DiskCacheStrategy.ALL)
        .into(myHolder.iv);

最后就把缩略图切换大图展示出来了，文中如有瑕疵还望指教，希望看到此处对你有帮助的可以下载完整demo运行，谢谢！

demo路径：https://download.csdn.net/download/lou_liang/10427839