CheckedTextView滚动列表视图后检查/取消选中 [英] Checkedtextview check/uncheck after scroll Listview

问题描述

我正在使用viewHolder和getview在listvew中开发checkedtextview.从数据库填充检查/取消检查状态绑定运行良好.但是，如果我选中该项目，然后滚动listview，它将返回到取消选中状态.

I'm developing checkedtextview in listvew using viewHolder and getview. To populate check/uncheck status binding from database is running well. But, if I check item and then scroll listview, it will back to uncheck.

这是我的customAdapter代码.

here is my customAdapter code.

public class CustomAdapter extends ArrayAdapter<Model> {
private Activity activity;
int id;
String autoid;
ArrayList<Model> items;
DatabaseHelper dbhelper = new DatabaseHelper(getContext());

public CustomAdapter(Activity context, int resource, ArrayList<Model> obj) {
    super(context, resource, obj);

    this.activity = context;
    this.id = resource;
    this.items = obj;

    try {
        dbhelper.openDatabase();
    } catch (SQLException e) {
        e.printStackTrace();
    }
}



static class ViewHolder {
    protected CheckedTextView textView;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder vh = null;

    if (convertView == null) {

        LayoutInflater inflater = activity.getLayoutInflater();
        convertView = inflater.inflate(id, null);
        vh = new ViewHolder();
        convertView.setTag(vh);

        vh.textView = (CheckedTextView) convertView.findViewById(R.id.textbox1);

    }
    else
    {
        vh = (ViewHolder) convertView.getTag();

    }

    final Model item = items.get(position);
    String status = item.getStatus();

    final Model check = getItem(position);

    final ViewHolder finalVh = vh;

    vh.textView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            autoid = item.getAutoid();

            if (! finalVh.textView.isChecked()) {
                finalVh.textView.setChecked(true);
            }
            else
            {
                finalVh.textView.setChecked(false);
            }
        }
    });

    vh.textView.setText(item.getDate() +". "+item.getInfo());
    vh.textView.setChecked(Boolean.parseBoolean(status));

    return convertView;
}}

提前谢谢.

推荐答案

那是因为您传递的列表(项目)具有旧值.更改检查状态时，请将其更新为已填充的列表(项目)滚动到列表视图时，列表视图将再次加载它们，并从中获取旧值.

Thats because your list(items) which you passed has the old value.When you change the check status,update it to the list(items) which is populated to the listview.On Scroll the list view will load them items again, where it is getting the old value.

vh.textView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        autoid = item.getAutoid();

        if (! finalVh.textView.isChecked()) {
            finalVh.textView.setChecked(true);
            item.setStatus("true")
        } else {
            finalVh.textView.setChecked(false);
            item.setStatus("false");
        }
        items.set(position, item);
    }
});

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