notifyDataSetChanged 在我的活动中不起作用

在我的代码中，当删除列表视图的行时，列表视图不会改变。我使用adapter.notifyDataSetChange()，但它不是word。这是我的代码：代码使类的位置不同。

CustomList adapter;
Integer[] imageId;
public String[] _Data2;
 public int positionAll;
ArrayList<ArrayList<String>> _Data = new ArrayList<ArrayList<String>>();
DataBase data = new DataBase(Show_Code.this, "MELK_TBL");


 try {
        data.open();
        _Data = data.GetData();
        imageId = new Integer[_Data.size()];
        _Data2 = new String[_Data.size()];
        for (int i = 0; i < _Data.size(); i++) {
            imageId[i] = R.drawable.municipal;
            _Data2[i] = _Data.get(i).get(1) + "_" + _Data.get(i).get(2) + "_" + _Data.get(i).get(3) + "_" + _Data.get(i).get(4) + "_" + _Data.get(i).get(5) + "_" + _Data.get(i).get(6) + "_0";
        }
        adapter = new CustomList(Show_Code.this, _Data2, imageId);
        data.close();
    } catch (Exception e) {
        Toast.makeText(getApplication(), e.toString(), Toast.LENGTH_LONG).show();
    }

    list.setAdapter(adapter);



list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view,
                                       int position, long id) {

            try {
                data.open();
                data.Delete(_Data.get(position).get(1), _Data.get(position).get(2), _Data.get(position).get(3), _Data.get(position).get(4), _Data.get(position).get(5), _Data.get(position).get(6), _Data.get(position).get(7));
                data.close();
                adapter.notifyDataSetChanged();
            } catch (Exception e) {
                Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
            }
            return true;
        }
    });

请帮助我，我没有时间:(

由于数组的大小在运行时不会更改，因此您需要创建新的适配器并再次设置为列表 您必须在 onItemLongClick 中添加此代码

data.open();
        _Data = data.GetData();
        imageId = new Integer[_Data.size()];
        _Data2 = new String[_Data.size()];
        for (int i = 0; i < _Data.size(); i++) {
            imageId[i] = R.drawable.municipal;
            _Data2[i] = _Data.get(i).get(1) + "_" + _Data.get(i).get(2) + "_" + _Data.get(i).get(3) + "_" + _Data.get(i).get(4) + "_" + _Data.get(i).get(5) + "_" + _Data.get(i).get(6) + "_0";
        }
        adapter = new CustomList(Show_Code.this, _Data2, imageId);
        data.close();
        list.setAdapter(adapter)