如何使用OnItemLongClickListener（）從SQLite創建的列表視圖中刪除項目？

Question

我在使用SimpleCursorAdapter創建的列表視圖中找不到要刪除的答案，所以我在片段中創建了該列表視圖，這是代碼

final Cursor cursor = myDb.cautarevenituri();

    // The desired columns to be bound
    final String[] columns = new String[] {
            DatabaseHelper.COL_2,
            DatabaseHelper.COL_3
    };

    int[] toviewids = new int[] { R.id.nume_item,R.id.valoare_item};
    dataAdapter = new SimpleCursorAdapter(getActivity().getBaseContext(),R.layout.item_layout,cursor,columns,toviewids,0);
    //
    final ListView listView = (ListView)getView().findViewById(R.id.listView_venituri);

    listView.setAdapter(dataAdapter);
    listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view,
                                       int position, long arg3) {
            Toast.makeText(getActivity(), " " + position, Toast.LENGTH_LONG).show();

            //delete from listview in database and listview too??
            //
            //

            return false;
        }

    });

謝謝。

Answer 1

從數據庫中刪除並刷新列表視圖。

Answer 2

您必須更新傳遞給適配器的列表，然后調用adapter.notifyDataSetChanged()

Answer 3

使用swapCursor()方法更新SimpleCursorAdapter的數據：

myDb.getWriteableDatabase().delete(TABLE_NAME, KEY_ID + "=?", position);
Cursor newCursor = myDb.getReadableDatabase().query(**etc.**);
dataAdapter.swapCursor(newCursor);