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

package com.xscm.modulemain.adapter;

import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;
import com.xscm.modulemain.R;
import com.xscm.moduleutil.bean.RedPacketInfo;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * 红包的列表适配器
 */
public class RedBagAdapter extends BaseQuickAdapter<RedPacketInfo, BaseViewHolder> {
    private Map<Integer,View> viewMap;
    public RedBagAdapter() {
        super(R.layout.item_red_bag);
        viewMap=new ConcurrentHashMap<>();
    }

    @Override
    protected void convert(BaseViewHolder helper, RedPacketInfo item) {
        viewMap.put(helper.getLayoutPosition(),helper.itemView);
        ImageView iv_red_bag= helper.getView(R.id.iv_red_bag);
        if (item.getIs_qiang()==1){
            iv_red_bag.setImageResource(com.xscm.moduleutil.R.mipmap.red_bj_h);
            helper.setText(R.id.tv_djs, "已领取");
        }else {
            iv_red_bag.setImageResource(com.xscm.moduleutil.R.mipmap.red);

            if (item.getType()==2){
                helper.setVisible(R.id.im_list_bj,true);
            }else {
                helper.setVisible(R.id.im_list_bj,false);
            }

            // 显示倒计时
            if (item.getCountdown() > 0) {
                helper.setVisible(R.id.tv_djs, true);
                long minutes = item.getCountdown() / 60;
                long seconds = item.getCountdown() % 60;
                String timeFormat = String.format("%02d:%02d", minutes, seconds);
                helper.setText(R.id.tv_djs, timeFormat);
            } else {
                helper.setVisible(R.id.tv_djs, false);
            }
        }

        helper.setText(R.id.tv_user_name, item.getNickname());

    }

    /**
     * 更新指定位置的倒计时显示，不刷新整个item
     * @param position 列表位置
     * @param countdown 倒计时时间(秒)
     */
    public void updateCountdown(int position, long countdown) {
        if (position >= 0 && position < getData().size()) {
            // 获取对应位置的item view
            View view = viewMap.get(position);
            if (view != null) {
                // 直接更新倒计时文本，不刷新整个item
                TextView tvDjs = view.findViewById(R.id.tv_djs);
                if (tvDjs != null) {
                    // 格式化倒计时显示
                    long minutes = countdown / 60;
                    long seconds = countdown % 60;
                    String timeFormat = String.format("%02d:%02d", minutes, seconds);
                    tvDjs.setText(timeFormat);

                    // 控制倒计时显示状态
                    if (countdown > 0) {
                        tvDjs.setVisibility(View.VISIBLE);
                    } else {
                        tvDjs.setVisibility(View.GONE);
                    }
                }
            }
        }
    }

    /**
     * 根据位置获取item view
     * @param position 位置
     * @return item对应的view
     */
    private View getViewByPosition(int position) {
        RecyclerView recyclerView = getRecyclerView();
        if (recyclerView != null) {
            RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
            if (layoutManager != null) {
                // 检查 position 是否在可见范围内
                if (layoutManager instanceof LinearLayoutManager) {
                    LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
                    int firstVisiblePosition = linearLayoutManager.findFirstVisibleItemPosition();
                    int lastVisiblePosition = linearLayoutManager.findLastVisibleItemPosition();

                    // 确保 position 在可见范围内
                    if (position >= firstVisiblePosition && position <= lastVisiblePosition) {
                        return layoutManager.findViewByPosition(position);
                    }
                }
            }
        }
        return null;
    }


}