Android 在单击时将ListView更新为删除项

我正在使用一个带有ListView的游标适配器和一个从sqlite数据库获取数据的游标。我有一个名为RenderList（）的函数，每当我用列表中的一个新项更新数据库时，或者如果我将一行的选中值设置为1（这将添加新项或删除项名称），我都会调用该函数

这将重置列表，因此，如果单击listview下方的项目，它将将listview重置为顶部位置。很明显，我缺少了一些关于如何以高效、可用的方式更新listview和数据库的信息

public class GroceryAdapter extends CursorAdapter {

    private final LayoutInflater mInflater;

    public GroceryAdapter(Context context, Cursor cursor) {

      super(context, cursor, true);
      mInflater = LayoutInflater.from(context);
     // mContext = context;

    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        TwoLineListItem listItem = (TwoLineListItem)view;
        TextView t1 = listItem.getText1();
        TextView t2 = listItem.getText2();

        t1.setText(cursor.getString(cursor.getColumnIndex(DbHelper.C_GROCERY)));
        t2.setText("Added by: Wes");

        t1.setTag(cursor.getInt(cursor.getColumnIndex(DbHelper.C_ID)));
        t2.setTag(cursor.getInt(cursor.getColumnIndex(DbHelper.C_CHECKED)));

        if (cursor.getInt(cursor.getColumnIndex(DbHelper.C_CHECKED)) == 1 ) {
            t1.setPaintFlags(t1.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
            listItem.setBackgroundColor(0xEECCCCCC);
        } else {
            t1.setPaintFlags(t1.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG) );
            listItem.setBackgroundColor(0x00000000);
        }
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        final View view = mInflater.inflate(R.layout.grocery_list_item, parent, false);
        return view;
    }

}

---

您可以使用adapter.notifydatasetchangedLike Iftikar said-notifyDataSetChanged。这会告诉适配器数据已更改，并导致listview完全刷新自身。我已尝试notifyDataSetChanged，但它似乎没有更新视图。我是否需要在游标适配器中添加某种侦听器/观察者方法？

public class GroceryAdapter extends CursorAdapter {

    private final LayoutInflater mInflater;

    public GroceryAdapter(Context context, Cursor cursor) {

      super(context, cursor, true);
      mInflater = LayoutInflater.from(context);
     // mContext = context;

    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        TwoLineListItem listItem = (TwoLineListItem)view;
        TextView t1 = listItem.getText1();
        TextView t2 = listItem.getText2();

        t1.setText(cursor.getString(cursor.getColumnIndex(DbHelper.C_GROCERY)));
        t2.setText("Added by: Wes");

        t1.setTag(cursor.getInt(cursor.getColumnIndex(DbHelper.C_ID)));
        t2.setTag(cursor.getInt(cursor.getColumnIndex(DbHelper.C_CHECKED)));

        if (cursor.getInt(cursor.getColumnIndex(DbHelper.C_CHECKED)) == 1 ) {
            t1.setPaintFlags(t1.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
            listItem.setBackgroundColor(0xEECCCCCC);
        } else {
            t1.setPaintFlags(t1.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG) );
            listItem.setBackgroundColor(0x00000000);
        }
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        final View view = mInflater.inflate(R.layout.grocery_list_item, parent, false);
        return view;
    }

}