android - RecyclerView 通用适配器

Question

尝试为 RecyclerView 创建通用适配器。
已经探索了其他解决方案: RecyclerView generic adapter with DataBinding
Add click listener to Generic RecyclerView Adapter
https://github.com/ravirupareliya/Recyclerview-Generic-Adapter/blob/master/app/src/main/java/com/rrr/genericrecyclerview/adapter/RecyclerAdapter.java

但是想要以有点不同的方式实现它。
这是我的适配器的样子:

public abstract class GenericAdapter<T> extends RecyclerView.Adapter<BaseHolder<T>> {

    private OnRecyclerItemClickListener mListener;
    private List<T> mItems;
    private final LayoutInflater mLayoutInflater;

    public GenericAdapter(Context context) {
        mLayoutInflater =
                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mItems = Collections.emptyList();
    }

    @Override
    public BaseHolder<T> onCreateViewHolder(ViewGroup parent, int viewType) {
        // assume that viewType is a resource id returned by getItemViewType 
        // also other solutions are welcome
        View view = mLayoutInflater.inflate(viewType, parent, false);

        // TODO: how to create the view holder ??
    }

    @Override
    public void onBindViewHolder(BaseHolder<T> holder, int position) {
        T item = mItems.get(position);
        holder.onBind(item, mListener);
    }

    @Override
    public int getItemCount() {
        return mItems != null ? mItems.size() : 0;
    }  

    public void setItems(List<T> items) {
        mItems = items;
        notifyDataSetChanged();
    }

    public void setItemClickListener(OnRecyclerItemClickListener listener) {
        mListener = listener;
    }
}

这是一个基本 View 持有者，我想从中扩展所有其他持有者:

public abstract class BaseHolder<T> extends RecyclerView.ViewHolder {

    public BaseHolder(View itemView) {
        super(itemView);
    }

    public abstract void onBind(T item, OnRecyclerItemClickListener listener);
}

问题出在onCreateViewHolder方法上。
如何创建 View 持有者？
我应该以某种方式实现抽象 BaseHolder 还是应该以某种方式更改适配器类声明扩展，即这里的 BaseHolder RecyclerView.Adapter> 应该是 BaseHolder 的一些通用实现？我试过了 > 但它不起作用

提前感谢您的任何建议

Answer 1

附言已经很久了，但是如果有人感兴趣，
当时我解决了它并发表在Generic RecyclerView Adapter library .
它最终使创建适配器变得非常容易。
我仍在多个生产项目中使用它。

编辑:所以适配器最终看起来像:

public abstract class GenericRecyclerViewAdapter<T, L extends BaseRecyclerListener, VH extends BaseViewHolder<T, L>> extends RecyclerView.Adapter<VH> {

    @Override
    public abstract VH onCreateViewHolder(ViewGroup parent, int viewType);
       
    // ...
}

因此，ViewHolder 的创建被委托(delegate)给适配器实现，即:

public class SimpleAdapter extends GenericRecyclerViewAdapter<User, OnRecyclerItemClickListener, UserViewHolder> {
    
    // ...

    @Override
    public UserViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // or return here any specific ViewHolder according to the viewType
        return new UserViewHolder(inflate(R.layout.item_user, parent), getListener());
    }
}

ViewHolder 是:

public abstract class BaseViewHolder<T, L extends BaseRecyclerListener> extends RecyclerView.ViewHolder {
   // ...
}