ProjectFrameKotlin/base/src/main/java/com/xuqm/base/adapter/BaseNormalAdapter.java

package com.xuqm.base.adapter;

import android.content.Context;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.xuqm.base.adapter.callback.AdapterItemClickListener;
import com.xuqm.base.adapter.callback.AdapterItemLongClickListener;

import java.util.ArrayList;
import java.util.List;

/**
 * 不用{@link BasePagedAdapter}的时候，可以用这个
 * <p>
 *
 * @param <T> 数据各式
 */
public abstract class BaseNormalAdapter<T> extends RecyclerView.Adapter<ViewHolder> {
    private Context context;
    private AdapterItemClickListener<T> itemClickListener;//item的点击事件
    private AdapterItemLongClickListener<T> itemLongClickListener;//item的长按事件
    private ItemViewDelegateManager<T> mItemViewDelegateManager;//ItemViewDelegate的管理类

    private List<T> list;

    private AdapterItemClickListener<T> listener;

    public BaseNormalAdapter() {
        this.list = new ArrayList<>();
        mItemViewDelegateManager = new ItemViewDelegateManager<>();
    }

    public BaseNormalAdapter(List<T> list) {
        this.list = null == list ? new ArrayList<>() : list;
        mItemViewDelegateManager = new ItemViewDelegateManager<>();
    }

    public void setmDatas(List<T> mDatas) {
        this.list.clear();
        this.addmDatas(null == mDatas ? new ArrayList<>() : mDatas);
    }

    public List<T> getDatas() {
        return this.list;
    }

    public void addmDatas(List<T> mDatas) {
        this.list.addAll(mDatas);
        notifyDataSetChanged();
    }

    public void addItem(T item) {
        this.list.add(item);
        notifyDataSetChanged();
    }

    public void removeItem(T item) {
        this.list.remove(item);
        notifyDataSetChanged();
    }


    @Override
    public int getItemViewType(int position) {
        if (!useItemViewDelegateManager()) return super.getItemViewType(position);
        return mItemViewDelegateManager.getItemViewType(list.get(position), position);
    }


    /**
     * 判断是否有多种ItemViewType
     * 根据mItemViewDelegateManager 里面存储的数量决定
     *
     * @return true 有多种ItemViewType
     */
    private boolean useItemViewDelegateManager() {
        return mItemViewDelegateManager.getItemViewDelegateCount() > 0;
    }

    /**
     * 添加不同的item样式
     *
     * @param itemViewDelegate 自定义的item
     * @return this
     */
    public BaseNormalAdapter addItemViewDelegate(ItemViewDelegate<T> itemViewDelegate) {
        mItemViewDelegateManager.addDelegate(itemViewDelegate);
        return this;
    }

    /**
     * 添加不同的item样式
     *
     * @param viewType         自定义的item type 不能重复
     * @param itemViewDelegate 自定义的item
     * @return this
     */
    public BaseNormalAdapter addItemViewDelegate(int viewType, ItemViewDelegate<T> itemViewDelegate) {
        mItemViewDelegateManager.addDelegate(viewType, itemViewDelegate);
        return this;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        ItemViewDelegate itemViewDelegate = mItemViewDelegateManager.getItemViewDelegate(viewType);
        int layoutId = itemViewDelegate.getItemViewLayoutId();//这里拿到自定义的layoutId
        context = parent.getContext();//context没用传递过来，这里自己获取到
        return new ViewHolder(context, parent, layoutId);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        if (null != itemClickListener) {
            holder.itemView.setOnClickListener(v -> itemClickListener.onClick(holder.itemView, list.get(position), position));
        }
        if (null != itemLongClickListener) {
            holder.itemView.setOnLongClickListener(v -> itemLongClickListener.onClick(holder.itemView, list.get(position), position));
        }
        convert(holder, list.get(position));
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    /**
     * 设置item点击监听
     *
     * @param itemClickListener item的点击事件
     */
    public void setItemClickListener(AdapterItemClickListener<T> itemClickListener) {
        this.itemClickListener = itemClickListener;
    }

    /**
     * 设置item长按监听
     *
     * @param itemLongClickListener item的长按事件
     */
    public void setItemLongClickListener(AdapterItemLongClickListener<T> itemLongClickListener) {
        this.itemLongClickListener = itemLongClickListener;
    }

    /**
     * 部分情况可以需要用到这个，比如item里面元素想要和item使用同一个回调处理
     *
     * @return
     */
    protected AdapterItemClickListener<T> getItemClickListener() {
        return itemClickListener;
    }

    /**
     * ui绘制的事件，分发给ItemViewDelegate自己处理
     * 比如settext()   setOnClickListener()这些
     *
     * @param holder holder
     * @param item   item
     */
    public void convert(ViewHolder holder, T item) {
        mItemViewDelegateManager.convert(holder, item, holder.getAdapterPosition());
    }

    /**
     * 刷新知道item
     *
     * @param position position
     */
    public void changeItem(int position) {
        if (0 <= position && position < getItemCount()) {
            notifyItemChanged(position);
        }
    }

    public void changeItem(int position, Object payload) {
        if (0 <= position && position < getItemCount()) {
            notifyItemChanged(position, payload);
        }
    }

}