ListView 数据错乱问题的解决(CheckBox)

最新推荐文章于 2020-03-27 16:30:17 发布

原创最新推荐文章于 2020-03-27 16:30:17 发布 · 551 阅读

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文章标签：

#ListView 数据错乱问题的解决Ch #listview #checkbox #数据

本文介绍如何在Android应用中使用自定义对话框适配器来实现多选功能，包括创建实体类、利用CheckBox进行选项选择，并通过OnCheckedChangeListener更新数据状态。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1.创建实体类时,多添加一条Boolean Checked

2. tag 运用

package com.smarttrans.phone.adapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.smarttrans.phone.R;
import com.smarttrans.phone.bean.BrandItemInfo;

import java.util.LinkedList;
import java.util.List;

/**
 * Created by ccj on 2015/12/29.
 */
public class DiaLogAdapter extends BaseAdapter {

    private LinkedList<String> selectedBrands;
    private Context context;
    private List<BrandItemInfo> brandInfoList;
    private final String TAG = "disorderlist";

    public DiaLogAdapter(Context context, List<BrandItemInfo> list) {

        this.context = context;
        brandInfoList = list;
        selectedBrands = new LinkedList<>();
    }

    @Override
    public int getCount() {
        return brandInfoList.size();
    }

    @Override
    public Object getItem(int i) {
        return null != brandInfoList ? brandInfoList.get(i) : null;
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    private class ViewHolder {
        private TextView brandChNameTv;
        private CheckBox followCheckBox;
    }


    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {

        ViewHolder viewHolder = null;
        BrandItemInfo brandItemInfo = (BrandItemInfo) getItem(i);
        if (null == view) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.dialog_list_item, null);
            viewHolder = new ViewHolder();
            LinearLayout linearLayout = (LinearLayout) view.findViewById(R.id.ll_list_item);
            viewHolder.brandChNameTv = (TextView) view.findViewById(R.id.tv_item);
            viewHolder.followCheckBox = (CheckBox) view.findViewById(R.id.cb_item);
            final ViewHolder finalViewHolder1 = viewHolder;
          
            final ViewHolder finalViewHolder = viewHolder;
            viewHolder.followCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                    BrandItemInfo info = (BrandItemInfo) finalViewHolder.followCheckBox.getTag();//取出缓存中的数据,设定他的选中状态
                    info.setSelected(compoundButton.isChecked());
                }
            });
            view.setTag(viewHolder);//将viewholder给Tag
           

        } else {

            viewHolder = (ViewHolder) view.getTag();
            
        }
	viewHolder.followCheckBox.setTag(brandItemInfo);//!!!!将项 的对象保存到 CheckBox的tag中
        viewHolder.brandChNameTv.setText(brandItemInfo.getBrandChName()); //最后设定 view中的数据        viewHolder.followCheckBox.setChecked(brandItemInfo.isSelected());        return view;    }  }

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