cursor = getContentResolver().query(GroceryItemProvider.ITEM_URI, projection, id+"="+GroceryItemTable.LIST_ID, null, null);
adapter= new SimpleCursorAdapter(this, R.layout.list_row, cursor, from, to , 0);
adapter.swapCursor(cursor);
这会创建一个包含整个表格的列表,而不是我通过自定义值传递的光标,这是默认行为吗?