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使用Databinding使用Recycleview

核心-根据xml的binding找到recycleview，然后和之前一样给他设置adapter等，区别是对于viewholder的处理，之前的viewholder里面是view，现在里面是viewbinding，绑定关系也在这里面进行绑定

1.页面的xml

2.子view的xml

3.adapter

public class RecycleviewAdapter extends RecyclerView.Adapter
   
     {    public List
    
      mList;    public Context mContext;    public RecycleviewAdapter(List
     
       mList, Context mContext) {        this.mList = mList;        this.mContext = mContext;    }    @NonNull    @Override    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {        //注意点-1        ItemBinding itemBinding = DataBindingUtil.inflate(LayoutInflater.from(mContext), R.layout.item, viewGroup, false);        RecycleviewHolder_Title recycleviewHolder_title = new RecycleviewHolder_Title(itemBinding.getRoot());        recycleviewHolder_title.setItemBinding(itemBinding);        return recycleviewHolder_title;    }    @Override    public int getItemViewType(int position) {        return 0;    }    @Override    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, final int i) {        User dataBean = mList.get(i);        //注意点-2 这里和之前的使用类似   和activity里面设置数据源是一样的道理        RecycleviewHolder_Title recycleviewHolder_title = (RecycleviewHolder_Title) viewHolder;        ;        recycleviewHolder_title.itemBinding.setItem(dataBean);        ///避免闪烁        recycleviewHolder_title.itemBinding.executePendingBindings();        recycleviewHolder_title.itemBinding.setOnItemClickListener(onItemClickListener);    }    @Override    public int getItemCount() {        if (mList == null || mList.size() == 0) {            return 0;        }        return mList.size();    }    class RecycleviewHolder_Title extends RecyclerView.ViewHolder {        private ItemBinding itemBinding;        public RecycleviewHolder_Title(@NonNull View itemView) {            super(itemView);        }        public void setItemBinding(ItemBinding itemBinding) {            this.itemBinding = itemBinding;        }    }    private OnItemClickListener onItemClickListener;    ;    public void setOnItemClickListener(OnItemClickListener onItemClickListener) {        this.onItemClickListener = onItemClickListener;    }    public interface OnItemClickListener {        public void onClick(User index);    }}
     
    
   

4.使用

//设置recycleview的数据        datas = new ObservableArrayList<>();        for (int i = 0; i < 5; i++) {            User user = new User();            user.setName("第" + (i + 1) + "的名字");            user.setPass("第" + (i + 1) + "的密码");            datas.add(user);        }//实例化adapter        recycleviewAdapter = new RecycleviewAdapter(datas, MainActivity.this);        recycleviewAdapter.setOnItemClickListener(new RecycleviewAdapter.OnItemClickListener() {            @Override            public void onClick(User index) {                Log.e("点击的位置", index.getName() + "");                for (int i = 0; i < 5; i++) {                    User user = new User();                    user.setName("点击后" + (i + 1) + "的名字");                    user.setPass("点击后" + (i + 1) + "的密码");                    datas.add(user);                    recycleviewAdapter.notifyDataSetChanged();                }            }        });        //给recycleview设置adapter等        activityMainBinding.recycleview.setAdapter(recycleviewAdapter);        activityMainBinding.recycleview.setLayoutManager(new LinearLayoutManager(this,                LinearLayoutManager.VERTICAL, false));

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