我正在使用viewHolder和getview在listvew中開發checkedtextview。從數據庫填充檢查/取消選中狀態綁定運行良好。但是,如果我檢查項目,然後滾動listview,它會回到取消選中。Checkedtextview check /取消選中後滾動Listview
這是我的customAdapter代碼。
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;
}}
在此先感謝。
超,所以基本上滾動listview會加載適配器還是怎麼樣? –
listview只是一次加載屏幕上的項目。當你開始滾動時,它會加載新的項目並丟棄舊的項目。然後當我們再次滾動時,它會從你提供給它的列表中加載項目 –
這條線從哪裏來? 'item.getAutoid();' – grant