yusheng-android/MainModule/src/main/java/com/xscm/modulemain/adapter/MultiSelectAdapter.java

package com.xscm.modulemain.adapter;

import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

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

import com.xscm.modulemain.R;
import com.xscm.moduleutil.bean.HeatedBean;

import java.util.ArrayList;
import java.util.List;
/**
 *@author qx
 *@data 2025/6/17
 *@description: 这是发布动态选择话题的适配器，多选状态
 */
public class MultiSelectAdapter extends RecyclerView.Adapter<MultiSelectAdapter.ViewHolder> {
    private List<HeatedBean> options;
    private SparseBooleanArray selectedPositions = new SparseBooleanArray();

    public MultiSelectAdapter(List<HeatedBean> options) {
        this.options = options;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_multi_select, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        HeatedBean item = options.get(position);

        boolean isSelected = selectedPositions.get(position, false);

        holder.tvOption.setText(item.getTitle());
        holder.checkbox.setSelected(isSelected);
        holder.checkbox.setOnClickListener(v -> {
            boolean newState = !isSelected;
            selectedPositions.put(position, newState);
            holder.checkbox.setSelected(newState);
            notifyItemChanged(position); // 刷新当前项
        });

        // 点击整个 item 也可以触发选中/取消
        holder.itemView.setOnClickListener(v -> {
            boolean currentState = selectedPositions.get(position, false);
            boolean newState = !currentState;
            selectedPositions.put(position, newState);
            holder.checkbox.setSelected(newState);
            notifyItemChanged(position);
        });

//        holder.itemView.setOnClickListener(v -> {
//            boolean isChecked = selectedPositions.get(position, false);
//            if (isChecked) {
//                selectedPositions.delete(position);
//            } else {
//                selectedPositions.put(position, true);
//            }
//            notifyItemChanged(position);
//        });
    }

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

    public List<HeatedBean> getSelectedItems() {
        List<HeatedBean> selected = new ArrayList<>();
        for (int i = 0; i < options.size(); i++) {
            if (selectedPositions.get(i)) {
                selected.add(options.get(i));
            }
        }
        return selected;
    }

    static class ViewHolder extends RecyclerView.ViewHolder {
        View checkbox;
        TextView tvOption;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            checkbox = itemView.findViewById(R.id.v_checkbox);
            tvOption = itemView.findViewById(R.id.tv_option);
        }
    }
}