如何使用 OnItemLongClickListener() 从 SQLite 创建的列表视图中删除项目？

Question

我无法在使用 SimpleCursorAdapter 创建的列表视图中找到要删除的答案所以我在一个片段中制作了这个列表视图，这是代码

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;
        }

    });

谢谢。

Answer 1

从数据库中删除并刷新列表视图。

Answer 2

您必须更新传递给适配器的列表，然后调用 adapter.notifyDataSetChanged()

Answer 3

使用swapCursor()方法更新SimpleCursorAdapter里面的数据:

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

如何使用 OnItemLongClickListener() 从 SQLite 创建的列表视图中删除项目？

How to delete items from listview created from SQLite using OnItemLongClickListener()?

java

sqlite

android

listview

simplecursoradapter