Android ListView cotent of the adapter has changed but ListView did not receive a notification

前段时间完成某项目离线数据部分时，用了大量ListView显示加载数据，在碰到大数据量的加载时容易出现的错误。即我们将List作为参数传递给ListView的Adapter，同时在开辟线程加载数据时直接对刚刚参数传递的List操作，具体代码如下：

[java] view plaincopyprint?
<SPAN style="FONT-SIZE: 18px">package com.jackchan.listtest;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class ListTestActivity extends Activity {

    private ListView mListView;
    private Button mBtn;
    private int text = 0;
    private List<String> mList;
    private MyAdapter mAdapter;
    private List<String> mListBak;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mListView = (ListView)findViewById(R.id.listview);
        mBtn = (Button)findViewById(R.id.btn);
        mList = new ArrayList<String>();
//      mListBak = new ArrayList<String>();
        mAdapter = new MyAdapter(mList);
        mListView.setAdapter(mAdapter);
        mBtn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                GetDataTask task = new GetDataTask();
                task.execute(new Void[0]);
            }
        });
    }

    private class GetDataTask extends AsyncTask<Void, Void, Void>{

        @Override
        protected Void doInBackground(Void... params) {
        // mListBak.clear();
            mList.clear();
            for(int i = 0; i < 50; i++){
                try {
                    Thread.sleep(50);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            // mListBak.add(text+"");
                mList.add(text+"");
                text++;
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
        // mAdapter.addList(mListBak);
            mAdapter.notifyDataSetChanged();
        }


    }

    private class MyAdapter extends BaseAdapter{

        private TextView mItem;
        private List<String> mData;


        public MyAdapter(List<String> data) {
            this.mData = data;
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return mData.size();
        }

        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;

补充：移动开发 , Android ,