package com.runt.open.mvvm.base.adapter;
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import android.util.Log;
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import android.view.LayoutInflater;
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import android.view.ViewGroup;
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import androidx.annotation.NonNull;
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import androidx.recyclerview.widget.RecyclerView;
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import androidx.viewbinding.ViewBinding;
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import com.runt.open.mvvm.databinding.LayoutNullBinding;
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import com.runt.open.mvvm.util.DimensionUtils;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.ParameterizedType;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Created by Administrator on 2021/10/27 0027.
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* DATA 数据类型
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* VB 适配器视图
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*/
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public abstract class BaseAdapter<DATA, VB extends ViewBinding> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
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protected List<DATA> dataList = new ArrayList<>();
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protected OnItemClickListener<DATA> onItemClickListener;
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public boolean showNull;
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public float defaultMarginBottom,lastMarginBottom;
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public interface OnItemClickListener<DATA>{
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void onItemClick(int position,DATA data);
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}
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public class ViewBindHolder extends RecyclerView.ViewHolder {
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ViewBinding binding;
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public ViewBindHolder(ViewBinding binding) {
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super(binding.getRoot());
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this.binding = binding;
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}
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}
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public void setOnItemClickListener(OnItemClickListener<DATA> onItemClickListener) {
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this.onItemClickListener = onItemClickListener;
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}
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public void setData(List<DATA> list){
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if(dataList != list) {
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dataList.clear();
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if (list != null) {
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dataList.addAll(list);
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}
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}
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notifyDataSetChanged();
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}
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public void addData(DATA data){
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if(data != null){
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dataList.add(data);
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}
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notifyDataSetChanged();
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}
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public void addData(List<DATA> list){
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if (list != null && list.size() > 0) {
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this.dataList.addAll(list);
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}
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notifyDataSetChanged();
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}
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public List<DATA> getData() {
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return dataList;
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}
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@NonNull
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@Override
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public ViewBindHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
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if(viewType == 1 ){
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try {
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//实例化viewbind
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Class<VB> entityClass = (Class<VB>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[1];
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Method method = entityClass.getMethod("inflate", LayoutInflater.class,ViewGroup.class,boolean.class);//get method from name "inflate";
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VB vBind = (VB) method.invoke(entityClass,LayoutInflater.from(parent.getContext()),parent,false);//execute method to create a objct of viewbind;
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return new ViewBindHolder(vBind);
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} catch (SecurityException e) {
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e.printStackTrace();
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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} catch (IllegalArgumentException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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} catch (InvocationTargetException e) {
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Throwable t = e.getTargetException();// 获取目标异常
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t.printStackTrace();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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//加载空数据
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return new ViewBindHolder( LayoutNullBinding.inflate( LayoutInflater.from(parent.getContext()), parent, false ) );
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}
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@Override
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public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
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ViewBindHolder bindHolder = (ViewBindHolder) holder;
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if(getItemViewType(position) == 0 || bindHolder.binding instanceof LayoutNullBinding){
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onBindEmptyView((LayoutNullBinding) bindHolder.binding);
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}else{
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if (onItemClickListener != null) {
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bindHolder.binding.getRoot().setOnClickListener(view -> {
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if(onItemClickListener != null){
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onItemClickListener.onItemClick(position,getItem(position));
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}
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});
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}
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onBindView((VB) bindHolder.binding, position, getItem(position));
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setBottomMargin(bindHolder,position);
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}
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}
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/**
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* 设置最后一个底部间隔
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* @param holder
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* @param position
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*/
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protected void setBottomMargin(ViewBindHolder holder, int position){
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setBottomMargin(holder,position,lastMarginBottom);
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}
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/**
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* 设置最后一个底部间隔
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* @param holder
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* @param position 位置
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* @param dp 间距
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*/
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protected void setBottomMargin(RecyclerView.ViewHolder holder, int position,float dp){
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setBottomMargin(holder,position,dp,defaultMarginBottom);
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}
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protected void setBottomMargin(RecyclerView.ViewHolder holder, int position, float dp, float defaultDp){
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ViewGroup.MarginLayoutParams params1 = (ViewGroup.MarginLayoutParams) holder.itemView.getLayoutParams();
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if(position == dataList.size() -1){
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params1.setMargins(params1.leftMargin, params1.topMargin, params1.rightMargin, (int) DimensionUtils.convertDpToPixel(dp,holder.itemView.getContext()));
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}else{
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params1.setMargins(params1.leftMargin, params1.topMargin, params1.rightMargin, (int) DimensionUtils.convertDpToPixel(defaultDp,holder.itemView.getContext()));
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}
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}
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/**
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* 空数据支持
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* @return
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*/
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@Override
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public int getItemCount() {
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return (showNull && dataList.size() == 0 )? 1 : dataList.size();
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}
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/**
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* 当下标为0，数据集合为0 返回0（意味当前应显示空数据视图））
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* @param position
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* @return
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*/
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@Override
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public int getItemViewType(int position) {
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return (showNull && position == 0 && dataList.size() == 0)? 0 : 1;
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}
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public DATA getItem(int position){
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if(position >= dataList.size()){
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return null;
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}else {
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return dataList.get(position);
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}
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}
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protected abstract void onBindView(VB binding, int position, DATA data);
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/**
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* 空数据显示
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*/
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protected void onBindEmptyView(LayoutNullBinding emptyBinding){
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Log.e("baseAdapter"," emptyBinding:"+emptyBinding);
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}
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}
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