我正在使用viewHolder和getview在listvew中开发checkedtextview。从数据库填充检查/取消选中状态绑定运行良好。但是,如果我检查项目,然后滚动listview,它会回到取消选中。Checkedtextview check /取消选中后滚动Listview
这是我的customAdapter代码。
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;
}}
在此先感谢。
超,所以基本上滚动listview会加载适配器还是怎么样? –
listview只是一次加载屏幕上的项目。当你开始滚动时,它会加载新的项目并丢弃旧的项目。然后当我们再次滚动时,它会从你提供给它的列表中加载项目 –
这条线从哪里来? 'item.getAutoid();' – grant