RecyclerView实现图片和视频列表展示、查看、删除等功能

绝地灬酷狼 2024-04-01 08:39 82阅读 0赞

RecyclerView具备强大的复用机制，高效的替代了最初的ListView和GridView等组件，很大程度上实现了代码解耦，并且提供了多种默认LayoutMananger用来处理多种布局，本篇介绍使用RecyclerView来实现图片和视频列表的展示、查看、删除等功能。

#### 1. RecyclerView重要组成部分 ####

*  Adapter：数据和视图对接的桥梁，定义了数据以怎样的视图形式进行展示。
 *  ViewHolder：Item视图的持有者。
 *  LayoutManager：管理视图渲染、Item复用回收等功能，有LinearLayoutManager、GridLayoutManager、StaggeredGridLayoutManager等。
 *  ItemDecoration：常用来实现列表的分割线等功能。
 *  ItemAnimator：用来实现Item的动画功能。

#### 2. 引入库 ####

implementation 'androidx.recyclerview:recyclerview:1.0.0'

#### 3. 图片和视频列表功能实现 ####

话不多说，先上效果图。图中可以看到，支持查看图片和视频两种列表，且列表中以日期进行分类显示。

![b5d46a0006ea420d87a869fe5fe2fa45.jpeg][]

*  布局activity\_media.xml（页面主布局）
 *      <?xml version="1.0" encoding="utf-8"?>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            android:orientation="vertical">
        
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="60dp"
                android:background="@color/colorBlack">
        
                <LinearLayout
                    android:id="@+id/llayMediaAction"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginLeft="90dp"
                    android:layout_marginTop="15dp"
                    android:orientation="horizontal"
                    android:visibility="invisible">
        
                    <Button
                        android:id="@+id/btnDelete"
                        android:layout_width="60dp"
                        android:layout_height="30dp"
                        android:background="@drawable/xml_media_btn_action"
                        android:text="删除"
                        android:textColor="@color/colorWhite" />
        
                    <Button
                        android:id="@+id/btnCancel"
                        android:layout_width="60dp"
                        android:layout_height="30dp"
                        android:layout_marginLeft="10dp"
                        android:background="@drawable/xml_media_btn_action"
                        android:text="取消"
                        android:textColor="@color/colorWhite" />
        
                </LinearLayout>
        
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center"
                    android:orientation="horizontal">
        
                    <TextView
                        android:id="@+id/txtMediaMid"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:enabled="false"
                        android:text="@string/media_photo"
                        android:textColor="#00ff00"
                        android:textSize="20sp" />
                </LinearLayout>
        
                <ImageView
                    android:id="@+id/imgBack"
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:layout_marginLeft="15dp"
                    android:layout_marginTop="15dp"
                    android:background="@drawable/xml_media_back" />
        
                <TextView
                    android:id="@+id/txtMediaRight"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:layout_marginTop="15dp"
                    android:layout_marginRight="15dp"
                    android:text="@string/media_video"
                    android:textColor="@color/colorWhite"
                    android:textSize="20sp" />
            </RelativeLayout>
        
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="#ffffff"
                android:orientation="vertical">
        
                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recyListMedia"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginLeft="@dimen/common_split_10"
                    android:layout_marginRight="@dimen/common_split_10" />
            </LinearLayout>
        
        </LinearLayout>
 *  布局media\_item\_title.xml（效果图中日期的布局）
 *      <?xml version="1.0" encoding="utf-8"?>
        <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="40dp">
        
            <TextView
                android:id="@+id/txtTitle"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="7dp"
                android:text="TextView"
                android:textColor="@color/colorFontCommon"
                android:textSize="20sp" />
        </RelativeLayout>
 *  布局media\_item\_photo.xml（效果图中图片的布局），布局中添加了复选框，用来做删除功能时使用。
 *      <?xml version="1.0" encoding="utf-8"?>
        <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
        
            <ImageView
                android:id="@+id/imgPhoto"
                android:layout_width="200dp"
                android:layout_height="200dp"
                android:layout_marginStart="1dp"
                android:layout_marginLeft="1dp"
                android:layout_marginTop="1dp"
                android:layout_marginEnd="1dp"
                android:layout_marginRight="1dp"
                android:layout_marginBottom="1dp"
                app:srcCompat="@drawable/app_deploy" />
        
            <CheckBox
                android:id="@+id/chkSelect"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_alignParentBottom="true"
                android:visibility="invisible" />
        </RelativeLayout>
 *  布局media\_item\_video.xml（视频的布局）

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    
        <ImageView
            android:id="@+id/imgVideo"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:layout_marginStart="1dp"
            android:layout_marginLeft="1dp"
            android:layout_marginTop="1dp"
            android:layout_marginEnd="1dp"
            android:layout_marginRight="1dp"
            android:layout_marginBottom="1dp"
            app:srcCompat="@drawable/app_deploy" />
    
        <ImageButton
            android:id="@+id/btnPlay"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:background="@drawable/btn_play" />
    
        <CheckBox
            android:id="@+id/chkSelect"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignParentBottom="true"
            android:visibility="invisible" />
    </RelativeLayout>

*      MediaActivity.java

由于列表中小图查看不方便，此部分中还使用Mango实现大图的滑动查看。

public class MediaActivity extends FragmentActivity
    {
        private MediaActivity _this;
    
        @BindView(R.id.imgBack)
        ImageView imgBack;
        @BindView(R.id.txtMediaMid)
        TextView txtMediaMid;
        @BindView(R.id.txtMediaRight)
        TextView txtMediaRight;
        @BindView(R.id.btnDelete)
        Button btnDelete;
        @BindView(R.id.btnCancel)
        Button btnCancel;
    
        @BindView(R.id.llayMediaAction)
        LinearLayout llayMediaAction;
    
        @BindView(R.id.recyListMedia)
        RecyclerView recyListMedia;
    
        private MediaListAdapter mediaListAdapter;
    
        //实际展示的图片列表，包括日期和图片两种数据类型
        private List<Object> listMediaBean = new ArrayList<Object>();
        //图片预览的数据源，不包括日期类型，所以比listMediaBean size小
        private List<MultiplexImage> listMangoImage = new ArrayList<MultiplexImage>();
    
        private AtomicBoolean readyDelete = new AtomicBoolean(false);
        private AtomicInteger count = new AtomicInteger(0);
    
        private Unbinder unbinder;
    
        private int currentShowMedia = MediaService.Photo;
    
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_media);
    
            unbinder = ButterKnife.bind(this);
            EventBus.getDefault().register(this);
            _this = this;
    
            this.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
    
            txtMediaRight.setOnClickListener(new TxtMediaClickHandler());
            imgBack.setOnClickListener(new ImgBackClickHandler());
    
            MediaActionHandler mediaActionHandler = new MediaActionHandler();
            btnDelete.setOnClickListener(mediaActionHandler);
            btnCancel.setOnClickListener(mediaActionHandler);
    
            initRecyclerView();
    
            showMedias(MediaService.Photo);
        }
    
        @Override
        protected void onResume()
        {
            super.onResume();
        }
    
        @Override
        protected void onDestroy() {
            super.onDestroy();
            unbinder.unbind();
            EventBus.getDefault().unregister(this);
        }
    
        private void initRecyclerView()
        {
            mediaListAdapter = new MediaListAdapter(this, listMediaBean, readyDelete, count);
            final GridLayoutManager gridLayoutManager = new GridLayoutManager(this, Constants.MediaList.SpanCount);
            gridLayoutManager.setSpanSizeLookup(new MediaSpanSizeLookup());
            recyListMedia.setLayoutManager(gridLayoutManager);
            recyListMedia.setHasFixedSize(true);
            recyListMedia.setNestedScrollingEnabled(false);
            recyListMedia.setItemViewCacheSize(200);
            recyListMedia.setRecycledViewPool(new RecyclerView.RecycledViewPool());
            recyListMedia.setAdapter(mediaListAdapter);
        }
    
        private class MediaSpanSizeLookup extends GridLayoutManager.SpanSizeLookup
        {
            @Override
            public int getSpanSize(int position)
            {
                Object obj = listMediaBean.get(position);
                if(obj instanceof String)
                {
                    return Constants.MediaList.SpanCount;
                }
                else if(obj instanceof MediaBean)
                    return 1;
    
                return 0;
            }
        }
    
        @Subscribe(threadMode = ThreadMode.MAIN)
        public void onMediaItemClick(MediaItemClickEvent event)
        {
            try
            {
                int position = event.getPosition();
                int mediaType = event.getMediaType();
                if(mediaType == MediaService.Photo)
                {
                    //使用Mango实现大图活动查看
                    Mango.setImages(listMangoImage);
                    Mango.setPosition(position);
                    Mango.open(this);
                }
                else if(mediaType == MediaService.Video)
                {
                    MediaBean videoBean = (MediaBean) listMediaBean.get(position);
                    String path = videoBean.getPath();
                    File file = new File(path);
                    if(!file.exists() || file.length() <= 0)
                    {
                        CustomToast.showToast(this, "视频文件不存在。");
                        return;
                    }
    
                    //调用系统播放视频
                    Uri uri = Uri.parse(path);
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setDataAndType(uri, "video/mp4");
                    startActivity(intent);
                }
                else
                {/*Do nothing.*/}
            }
            catch (Exception e)
            {
                LOGUtil.e(e.getMessage());
            }
        }
    
        @Subscribe(threadMode = ThreadMode.MAIN)
        public void onShowDelete(MessageShowDeleteEvent event)
        {
            if(event.isShow())
                llayMediaAction.setVisibility(View.VISIBLE);
            else
                llayMediaAction.setVisibility(View.INVISIBLE);
        }
    
        private class MediaActionHandler implements View.OnClickListener
        {
            @Override
            public void onClick(View v)
            {
                try
                {
                    switch (v.getId())
                    {
                        case R.id.btnCancel : {
                            for (Object obj : listMediaBean)
                            {
                                if(obj instanceof MediaBean)
                                {
                                    MediaBean bean = (MediaBean) obj;
                                    CheckBox chkSelect = bean.getChkSelect();
                                    if(chkSelect != null)
                                    {
                                        chkSelect.setChecked(false);
                                        chkSelect.setVisibility(View.INVISIBLE);
                                    }
                                }
                            }
    
                            readyDelete.set(false);
                            llayMediaAction.setVisibility(View.INVISIBLE);
                            mediaListAdapter.notifyDataSetChanged();
                            break;
                        }
                        case R.id.btnDelete : {
                            //删除照片或视频
                            boolean isSelect = false;
                            for (Object obj : listMediaBean)
                            {
                                if(obj instanceof MediaBean)
                                {
                                    MediaBean bean = (MediaBean) obj;
                                    CheckBox chkSelect = bean.getChkSelect();
                                    if(chkSelect != null && chkSelect.isChecked())
                                    {
                                        isSelect = true;
                                        String path = bean.getPath();
                                        File file = new File(path);
                                        file.delete();
                                    }
                                }
                            }
    
                            if(!isSelect)
                            {
                                if(currentShowMedia == MediaService.Photo)
                                    CustomToast.showToast(_this, "未选择图片");
                                else
                                    CustomToast.showToast(_this, "未选择视频");
                                return;
                            }
    
                            clearPreMediaInfo();
    
                            if(currentShowMedia == MediaService.Photo)
                            {
                                showMedias(MediaService.Photo);
                            }
                            else
                                showMedias(MediaService.Video);
    
                            llayMediaAction.setVisibility(View.INVISIBLE);
                            break;
                        }
                        default:break;
                    }
                }
                catch (Exception e)
                {
                    LOGUtil.e(e.getMessage());
                }
            }
        }
    
        private class ImgBackClickHandler implements View.OnClickListener
        {
            @Override
            public void onClick(View view)
            {
                try
                {
                    finish();
                }
                catch (Exception e)
                {
                    LOGUtil.e(e.getMessage());
                }
            }
        }
    
        private class TxtMediaClickHandler implements View.OnClickListener
        {
            @Override
            public void onClick(View view)
            {
                try
                {
                    String txt = txtMediaRight.getText().toString();
                    if(txt.equals("图片"))
                    {
                        txtMediaMid.setText(R.string.media_photo);
                        txtMediaRight.setText(R.string.media_video);
                        showMedias(MediaService.Photo);
                    }
                    else if(txt.equals("视频"))
                    {
                        txtMediaMid.setText(R.string.media_video);
                        txtMediaRight.setText(R.string.media_photo);
                        showMedias(MediaService.Video);
                    }
                    else
                    {/*Do nothing.*/}
                }
                catch (Exception e)
                {
                    LOGUtil.e(e.getMessage());
                }
            }
        }
    
        private void showMedias(int mediaType)
        {
            try
            {
                clearPreMediaInfo();
                currentShowMedia = mediaType;
    
                Map<String, List<MediaBean>> mapMedia = MediaService.findAllMedia(mediaType);
                if(mapMedia == null || mapMedia.size() == 0)
                {
                    mediaListAdapter.notifyDataSetChanged();
                    return;
                }
    
                Set<String> setMedia = mapMedia.keySet();
                Set<String> sortSet = new TreeSet<String>(new Comparator<String>() {
                    @Override
                    public int compare(String s1, String s2)
                    {
                        return s2.compareTo(s1);
                    }
                });
    
                sortSet.addAll(setMedia);
    
                Iterator<String> it = sortSet.iterator();
                while (it.hasNext())
                {
                    String key = it.next();
                    listMediaBean.add(key);
    
                    List<MediaBean> listBean = mapMedia.get(key);
                    Collections.sort(listBean, new Comparator<MediaBean>() {
                        @Override
                        public int compare(MediaBean o1, MediaBean o2)
                        {
                            return o1.getPath().compareTo(o2.getPath());
                        }
                    });
    
                    int count = listBean.size();
                    for (int i = 0; i < count; i++)
                    {
                        MediaBean bean = listBean.get(count - 1 - i);
                        listMediaBean.add(bean);
    
                        if(mediaType == MediaService.Photo)
                            listMangoImage.add(new MultiplexImage(bean.getPath(), bean.getPath(), MultiplexImage.ImageType.NORMAL));
                    }
                }
    
                mediaListAdapter.notifyDataSetChanged();
            }
            catch (Exception e)
            {
                LOGUtil.e(e.getMessage());
            }
        }
    
        private void clearPreMediaInfo()
        {
            listMediaBean.clear();
            listMangoImage.clear();
            count.set(0);
            readyDelete.set(false);
        }
    }

MediaListAdapter.java

public class MediaListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
    {
        private static final int TypeTitle = 1;
        private static final int TypeImage = 2;
        private static final int TypeVideo = 3;
    
        private Context context;
        private List<Object> listMediaBean;
    
        private SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
        private SimpleDateFormat newFormat = new SimpleDateFormat("yyyy年MM月dd日");
    
        private AtomicBoolean readyDelete;
        private AtomicInteger count;
    
        public MediaListAdapter(Context context, List<Object> listMediaBean, AtomicBoolean readyDelete, AtomicInteger count)
        {
            this.context = context;
            this.listMediaBean = listMediaBean;
            this.readyDelete = readyDelete;
            this.count = count;
        }
    
        @NonNull
        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
        {
            //此处根据数据的类型（日期、图片、还是视频），生成对应的视图
            int width = parent.getWidth();
            View view;
            if(viewType == TypeTitle)
            {
                view = LayoutInflater.from(context).inflate(R.layout.media_item_title, parent, false);
                ImageTitleViewHolder imageTitleViewHolder = new ImageTitleViewHolder(view);
                return imageTitleViewHolder;
            }
            else if(viewType == TypeImage)
            {
                view = LayoutInflater.from(context).inflate(R.layout.media_item_photo, parent, false);
                ImageListViewHolder imageListViewHolder = new ImageListViewHolder(view, width);
                return imageListViewHolder;
            }
            else if(viewType == TypeVideo)
            {
                view = LayoutInflater.from(context).inflate(R.layout.media_item_video, parent, false);
                VideoListViewHolder videoListViewHolder = new VideoListViewHolder(view, width);
                return videoListViewHolder;
            }
    
            return null;
        }
    
        @Override
        public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, final int position)
        {
            try
            {
                if(holder instanceof ImageTitleViewHolder)
                {
                    count.set(count.get() + 1);
                    ImageTitleViewHolder imageTitleViewHolder = (ImageTitleViewHolder)holder;
                    String title = (String) listMediaBean.get(position);
                    Date date = format.parse(title);
                    imageTitleViewHolder.txtTitle.setText(newFormat.format(date));
                }
                else
                {
                    ImageView imgPhoto = null;
                    CheckBox chkSelect = null;
                    int parentWidth = 0;
    
                    MediaBean bean = (MediaBean)listMediaBean.get(position);
                    if(holder instanceof ImageListViewHolder)
                    {
                        ImageListViewHolder imageListViewHolder = (ImageListViewHolder)holder;
                        imgPhoto = imageListViewHolder.imgPhoto;
                        chkSelect = imageListViewHolder.chkSelect;
                        parentWidth = imageListViewHolder.parentWidth;
                    }
                    else if(holder instanceof VideoListViewHolder)
                    {
                        VideoListViewHolder videoListViewHolder = (VideoListViewHolder)holder;
                        imgPhoto = videoListViewHolder.imgVideo;
                        chkSelect = videoListViewHolder.chkSelect;
                        parentWidth = videoListViewHolder.parentWidth;
                    }
    
                    bean.setChkSelect(chkSelect);
                    
                    //此处需注意，由于图片或视频量可能很大，因此使用Glide库进行图片和视频的处理。
                    Glide.with(context).load(bean.getPath()).thumbnail(0.1F).into(imgPhoto);
                    RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) imgPhoto.getLayoutParams();
                    int width = parentWidth / Constants.MediaList.SpanCount;
                    int height = width * 1200 / 1920;
                    params.width = width;
                    params.height = height;
                    imgPhoto.setLayoutParams(params);
    
                    ItemClickHandler clickHandler = new ItemClickHandler(count.get(), position);
                    ItemLongClickHandler longClickHandler = new ItemLongClickHandler(count.get(), position);
                    if(holder instanceof VideoListViewHolder)
                    {
                        VideoListViewHolder videoListViewHolder = (VideoListViewHolder)holder;
                        params = (RelativeLayout.LayoutParams) videoListViewHolder.btnPlay.getLayoutParams();
                        int wh = DensityUtil.dip2px(40);
                        params.leftMargin = (width - wh) / 2;
                        params.topMargin = (height - wh) / 2;
                        videoListViewHolder.btnPlay.setLayoutParams(params);
    
                        videoListViewHolder.btnPlay.setOnClickListener(clickHandler);
                        videoListViewHolder.btnPlay.setOnLongClickListener(longClickHandler);
                    }
    
                    imgPhoto.setOnClickListener(clickHandler);
                    imgPhoto.setOnLongClickListener(longClickHandler);
    
                    chkSelect.setChecked(false);
                    if(readyDelete.get())
                        chkSelect.setVisibility(View.VISIBLE);
                    else
                        chkSelect.setVisibility(View.INVISIBLE);
                }
            }
            catch (Exception e)
            {
                LOGUtil.e(e.getMessage());
            }
        }
    
        @Override
        public int getItemViewType(int position)
        {
            Object obj = listMediaBean.get(position);
            if(obj instanceof String)
                return TypeTitle;
            else
            {
                if(obj instanceof MediaBean)
                {
                    MediaBean bean = (MediaBean)obj;
                    int type = bean.getType();
                    if(type == MediaService.Photo)
                        return TypeImage;
                    else if(type == MediaService.Video)
                        return TypeVideo;
                }
            }
    
            return super.getItemViewType(position);
        }
    
        @Override
        public int getItemCount()
        {
            return listMediaBean.size();
        }
    
        private class ItemLongClickHandler implements View.OnLongClickListener
        {
            private int titleCount;
            private int position;
    
            public ItemLongClickHandler(int titleCount, int position)
            {
                this.titleCount = titleCount;
                this.position = position;
            }
    
            @Override
            public boolean onLongClick(View v)
            {
                try
                {
                    if(readyDelete.get())
                    {
                        MediaBean bean = (MediaBean) listMediaBean.get(position);
                        bean.getChkSelect().setChecked(!bean.getChkSelect().isChecked());
                        return true;
                    }
    
                    for (Object obj: listMediaBean)
                    {
                        if(obj instanceof MediaBean)
                        {
                            MediaBean bean = (MediaBean) obj;
                            CheckBox chkSelect = bean.getChkSelect();
                            if(chkSelect == null)
                                break;
    
                            chkSelect.setVisibility(View.VISIBLE);
                        }
                    }
    
                    MediaBean bean = (MediaBean) listMediaBean.get(position);
                    bean.getChkSelect().setChecked(true);
                    readyDelete.set(true);
    
                    EventBus.getDefault().post(new MessageShowDeleteEvent(true));
                }
                catch (Exception e)
                {
                    LOGUtil.e(e.getMessage());
                }
                return true;
            }
        }
    
        private class ItemClickHandler implements View.OnClickListener
        {
            private int titleCount;
            private int position;
    
            public ItemClickHandler(int titleCount, int position)
            {
                this.titleCount = titleCount;
                this.position = position;
            }
    
            @Override
            public void onClick(View view)
            {
                try
                {
                    if(readyDelete.get())
                    {
                        MediaBean bean = (MediaBean) listMediaBean.get(position);
                        bean.getChkSelect().setChecked(!bean.getChkSelect().isChecked());
                        return;
                    }
    
                    int tempPos = 0;
                    int mediaType = 0;
                    switch (view.getId())
                    {
                        case R.id.imgPhoto : {
                            tempPos = position - titleCount;
                            mediaType = MediaService.Photo;
                            break;
                        }
                        case R.id.imgVideo : {
                            tempPos = position;
                            mediaType = MediaService.Video;
                            break;
                        }
                        case R.id.btnPlay : {
                            tempPos = position;
                            mediaType = MediaService.Video;
                        }
                        default:break;
                    }
    
                    EventBus.getDefault().post(new MediaItemClickEvent(tempPos, mediaType));
                }
                catch (Exception e)
                {
                    LOGUtil.e(e.getMessage());
                }
            }
        }
    
        public class ImageTitleViewHolder extends RecyclerView.ViewHolder
        {
            private View view;
            private TextView txtTitle;
    
            public ImageTitleViewHolder(View view)
            {
                super(view);
    
                this.view = view;
                txtTitle = (TextView) view.findViewById(R.id.txtTitle);
            }
        }
    
        public class ImageListViewHolder extends RecyclerView.ViewHolder
        {
            private View view;
            private ImageView imgPhoto;
            private CheckBox chkSelect;
            private int parentWidth;
    
            public ImageListViewHolder(View view, int parentWidth)
            {
                super(view);
    
                this.view = view;
                this.parentWidth = parentWidth;
                imgPhoto = (ImageView) view.findViewById(R.id.imgPhoto);
                chkSelect = (CheckBox) view.findViewById(R.id.chkSelect);
            }
        }
    
        public class VideoListViewHolder extends RecyclerView.ViewHolder
        {
            private View view;
            private ImageView imgVideo;
            private ImageButton btnPlay;
            private CheckBox chkSelect;
            private int parentWidth;
    
            public VideoListViewHolder(View view, int parentWidth)
            {
                super(view);
    
                this.view = view;
                this.parentWidth = parentWidth;
                imgVideo = (ImageView) view.findViewById(R.id.imgVideo);
                btnPlay = (ImageButton) view.findViewById(R.id.btnPlay);
                chkSelect = (CheckBox) view.findViewById(R.id.chkSelect);
            }
        }
    }

*      MediaBean.java

MediaBean用来存储列表中的数据，界面更新时，根据type字段判断数据是图片、还是视频，从而根据数据生成对应的视图。

public class MediaBean
    {
        private String parentDir;
        private String path;
        private int type;//图片或视频
    
        private CheckBox chkSelect;//用于删除时标定是不是选中
    
        public CheckBox getChkSelect() {
            return chkSelect;
        }
    
        public void setChkSelect(CheckBox chkSelect) {
            this.chkSelect = chkSelect;
        }
    
        public String getParentDir() {
            return parentDir;
        }
    
        public void setParentDir(String parentDir) {
            this.parentDir = parentDir;
        }
    
        public String getPath() {
            return path;
        }
    
        public void setPath(String path) {
            this.path = path;
        }
    
        public int getType() {
            return type;
        }
    
        public void setType(int type) {
            this.type = type;
        }
    }

[b5d46a0006ea420d87a869fe5fe2fa45.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/01/7df3a07aa9594ced8c6933cc2f3dbb86.jpeg