listview中控件回显问题

ListView CheckBox 回显解决方案

最新推荐文章于 2020-09-07 18:11:26 发布

原创最新推荐文章于 2020-09-07 18:11:26 发布 · 198 阅读

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CC 4.0 BY-SA版权

本文介绍了一种解决ListView中CheckBox在滑动时状态丢失的问题。通过保存每个CheckBox的状态并在ListView重新加载时恢复这些状态，确保了用户选择的持久化。

最近在做项目时用到listview中包括checkBox控件，当listview高度超出屏幕执行上下滑屏时之前被选中的checkBox会因为重新加载视图而被置为未选中；解决方法如下：

private Boolean[] isCheck;//解决checkBox回显问题
	
	public ListAdapter(Context ctx,List<Map<String, String>> data){
		this.context = ctx;
		this.list = data;
		isCheck = new Boolean[data.size()];
		for(int i=0;i<isCheck.length;i++){
			isCheck[i] = false;
		}
	}
	@Override
	public int getCount() {
		return list.size();
	}

	@Override
	public Object getItem(int position) {
		return list.get(position);
	}

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

	@Override
	public View getView(final int position, View convertView, ViewGroup parent) {
		HoldView holdView = null;
		if(holdView == null){
			holdView = new HoldView();
			convertView = LayoutInflater.from(context).inflate(R.layout.export, null);
			holdView.tvName = (TextView) convertView.findViewById(R.id.tv_export_name);
			holdView.tvPhone = (TextView) convertView.findViewById(R.id.tv_export_phone);
			holdView.cBox = (CheckBox) convertView.findViewById(R.id.cb_export_id);
			convertView.setTag(holdView);
		}else {
			holdView = (HoldView) convertView.getTag();
		}
		holdView.tvName.setText(list.get(position).get("name"));
		holdView.tvPhone.setText(list.get(position).get("phone"));
		holdView.cBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			
			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				if(isChecked){
					cbSelectName.add(list.get(position).get("name"));
					cbSelectList.add(list.get(position).get("phone"));
					isCheck[position] = true;
				}else {
					cbSelectName.remove(list.get(position).get("name"));
					cbSelectList.remove(list.get(position).get("phone"));
					isCheck[position] = false;
				}
			}
		});
		holdView.cBox.setChecked(isCheck[position]);
		return convertView;
	}

	class HoldView{
		ImageView imageView;
		TextView tvName;
		TextView tvPhone;
		CheckBox cBox;
	}