Android视图中包含的惰性列在滚动时会出现很大的延迟。
创始人
2024-10-10 13:30:54
0

解决这个问题的方法是通过使用“重用视图”来优化您的RecyclerView适配器。具体来说,您可以检查您的适配器中每个ViewHolder的实现,以确保您在必要时正确地使用缓存视图。

以下是一个例子,展示了如何在共享单个ViewStub实例的情况下使用“策略”来适当重用视图:

public class MyAdapter extends RecyclerView.Adapter {
 
    private final LayoutInflater mInflater;
 
    private final ViewStub mCachedViewStub;
 
    private int mLastPosition = -1;
 
    private final RecyclingLayoutManager mLayoutManager;
 
    private List mData = new ArrayList<>();
 
    public MyAdapter(Context context, RecyclerView recyclerView) {
        mInflater = LayoutInflater.from(context);
        mCachedViewStub = new ViewStub(context);
        mLayoutManager = new RecyclingLayoutManager(context);
        recyclerView.setLayoutManager(mLayoutManager);
        recyclerView.setAdapter(this);
    }
 
    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        final View view = mCachedViewStub.inflate();
        final ViewHolder holder = new ViewHolder(view);
        mLayoutManager.registerViewHolder(holder);
        return holder;
    }
 
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        final MyObject item = mData.get(position);
        if (item != null) {
            holder.bind(item);
            holder.itemView.setVisibility(View.VISIBLE);
            mLastPosition = position;
        } else {
            holder.itemView.setVisibility(View.GONE);
        }
    }
 
    @Override
    public int getItemCount() {
        return mData.size();
    }
 
    public void swapData(List data) {
        mData = data != null ? new ArrayList<>(data) : new ArrayList<>();
        notifyDataSetChanged();
    }
 
    static class RecyclingLayoutManager extends LinearLayoutManager {
 
        private final SparseArray mViewHolders = new SparseArray<>();
 
        RecyclingLayoutManager(Context context) {
            super(context);
        }
 
        void registerViewHolder(MyAdapter.ViewHolder holder) {
            mViewHolders.append(holder.hashCode(), holder);
        }
 
        @NonNull
        @Override
        public RecyclerView.LayoutParams generateDefaultLayoutParams() {
            return new MyLayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.WRAP_CONTENT);
        }
 
        @Override
        public RecyclerView.LayoutParams generateLayoutParams(Context c, AttributeSet attrs) {
            return new MyLayoutParams(c, attrs);
        }
 
        @Override
        public RecyclerView.LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) {
            return new MyLayoutParams(lp);
        }
 
        @Override

相关内容

热门资讯

透视脚本!aapoker透视脚... 透视脚本!aapoker透视脚本下载,红龙poker作弊指令,最新研发(有挂攻略)1、起透看视 aa...
透视了解!wepoker免费永... 透视了解!wepoker免费永久脚本,wepoker模拟器哪个好用,可靠教程(起初是真的有挂);we...
透视玄学!wepoker透视版... 透视玄学!wepoker透视版下载,hhpoker怎么开透视,大神普及(有挂透明)是一款可以让一直输...
透视好牌!红龙poker作弊指... 透视好牌!红龙poker作弊指令,wejoker辅助器怎么卖,实用技巧(原先真的是有挂);亲真的是有...
透视讲解!aapoker辅助是... 透视讲解!aapoker辅助是真的吗,德普之星透视辅助软件下载,总算清楚(有挂黑科技);小薇(透视辅...
透视透视!aapoker透视脚... 透视透视!aapoker透视脚本安装包,wepoker开辅助能查到吗,2025版教程(其实有挂);玩...
透视好友!aapoker透视脚... 透视好友!aapoker透视脚本下载,智星德州菠萝透视插件工具,交流学习经验(有挂辅助挂)您好,智星...
透视ai代打!wpk透视脚本,... 透视ai代打!wpk透视脚本,wpk透视插件,实用技巧(原先真的是有挂);wpk透视脚本软件透明挂作...
透视好友!wepoker底牌透... 透视好友!wepoker底牌透视脚本,wpk透视脚本视频,玩家攻略推荐(有挂规律);致您一封信;亲爱...
透视好牌!wpk有没有脚本,h... 《透视好牌!wpk有没有脚本,hhpoker真的有透视吗,AA德州教程(往昔有挂)》 wpk有没有脚...