Android的notifyDatasetChange用SQLite游标怎么样？

所以我有2个活动 .

第一个（ActivityOne）显示一个listview，其中包含来自SQLite游标的数据和一个按钮 . 单击该按钮，我想将一个项目添加到列表视图中，因此我显示第二个活动（ActivityTwo），其中包含许多editTexts和一个保存按钮，用于在数据库中进行保存 .

But what I want is ：

将新项目保存到数据库后，ActivityTwo应该关闭，并且应该显示ActivityOne以及来自数据库的刷新内容

. 这似乎是合理的工作流程 . 我该如何实现？ ActivityOne代码：

public class ActivityOne extends Activity {

    private ArrayList<String> idclient = new ArrayList<String>();
    private ArrayList<String> numeclient = new ArrayList<String>();
    private ArrayList<String> tipclient = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ListView mylist = (ListView) findViewById(R.id.lv_clienti);
        LoadList();

        Button btnex = (Button) findViewById(R.id.btnNewCli);
        btnex.setOnClickListener(
                new View.OnClickListener()
                {
                    public void onClick(View aView)
                    {
                        Toast.makeText(getApplicationContext(), "Add new client... " , Toast.LENGTH_SHORT).show();
                        Intent toAnotherActivity = new Intent(aView.getContext(), NewClientActivity.class);
                        startActivity(toAnotherActivity);
                    }
                }
        );
    }

 public void LoadList(){
        SQLiteDatabase db = new myDbHelper(getApplicationContext()).getWritableDatabase();
        Cursor mCursor = db.rawQuery("select idclient,nameclient,typeclient from clienti order by numeclient" , null);
        idclient.clear();
        numeclient.clear();
        tipclient.clear();

        if (mCursor.moveToFirst()) {
            do {
                idclient.add(Integer.toString(mCursor.getInt(0)));
                nameclient.add(mCursor.getString(1));
                typeclient.add(mCursor.getString(2));
            } while (mCursor.moveToNext());
        }
        DisplayClientiAdapter disadpt = new DisplayClientiAdapter(ClientiActivity.this,idclient,nameclient, typeclient);
        ListView lv = (ListView) findViewById(R.id.lv_clienti);
        lv.setAdapter(disadpt);
        mCursor.close();
        db.close();
    }
}

在ActivityTwo中，我点击了一下按钮：

db.execSQL("insert into clients (idclient, nameclient,typeclient,...");
DisplayClientiAdapter da = new DisplayClientiAdapter(getApplicationContext());
da.notifyDataSetChanged();
finish();

displayAdapter也是这样的：

public class DisplayClientiAdapter  extends BaseAdapter {
    private Context mContext;
    private ArrayList<String> idclient;
    private ArrayList<String> numeclient;
    private ArrayList<String> tipclient;

    public DisplayClientiAdapter(Context c){
        this.mContext = c;
    }

    public DisplayClientiAdapter(Context c,  ArrayList<String> idclient, ArrayList<String> numeclient, ArrayList<String> tipclient) {
        this.mContext = c;
        this.idclient = idclient;
        this.numeclient = numeclient;
        this.tipclient = tipclient;
    }

    public int getCount() {
        return idclient.size();
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    public View getView(int pos, View child, ViewGroup parent) {
        Holder mHolder;
        LayoutInflater layoutInflater;
        if (child == null) {
            layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            child = layoutInflater.inflate(R.layout.clienti_item, null);
            mHolder = new Holder();
            mHolder.txt_idclient = (TextView) child.findViewById(R.id.tv_cl_id);
            mHolder.txt_numeclient = (TextView) child.findViewById(R.id.tv_cl_nume);
            mHolder.txt_tipclient = (TextView) child.findViewById(R.id.tv_cl_tip);
            child.setTag(mHolder);
        } else {
            mHolder = (Holder) child.getTag();
        }
        mHolder.txt_idclient.setText(idclient.get(pos));
        mHolder.txt_numeclient.setText(numeclient.get(pos));
        mHolder.txt_tipclient.setText(tipclient.get(pos));
        return child;
    }

    public class Holder {
        TextView txt_idclient;
        TextView txt_numeclient;
        TextView txt_tipclient;
    }

当然它不会像这样工作 . 列表没有刷新...我认为它与displayAdapter有关！？！？！我无法调用LoadList方法，因为它是静态的或类似的东西......

请帮忙 . 谢谢