ListView的bug解決，如果有checkbox的話，選中的值在翻屏時會跳來跳去

始化資料data = new ArrayList<HashMap>();  for (int i = 0; i < 20; i++) {      map = new HashMap();      map.put("title", "title-->" + i);      map.put("content", "content--" + i);      data.add(map);  }  設定ListViewadapter = new MyAdapter(CheckList.this, data);  mListView.setAdapter(adapter);  // 為listview的子項添加點擊事件，position就是原來的arg2   mListView.setOnItemClickListener(new OnItemClickListener() {      @Override      public void onItemClick(AdapterView<?> parent, View view,              int position, long id) {          System.out.println("您所點擊的行號是：" + position);      }  });  定義我們需要的adapterint count = scroll_num;  Context mContext;  ArrayList<HashMap> mData;  LayoutInflater mInflater;    public MyAdapter(Context context, ArrayList<HashMap> data) {      this.mContext = context;      this.mData = data;      mInflater = (LayoutInflater) mContext              .getSystemService(mContext.LAYOUT_INFLATER_SERVICE);      if (count > mData.size()) {          count = mData.size();      }      isSelected = new HashMap<Integer, Boolean>();      for (int i = 0; i < data.size(); i++) {          isSelected.put(i, false);      }  }    @Override  public int getCount() {      return mData.size();  }    @Override  public Object getItem(int position) {      return position;  }    @Override  public long getItemId(int position) {      return position;  }    @Override  public View getView(final int position, View convertView,          ViewGroup parent) {      if (convertView == null) {          convertView = mInflater.inflate(R.layout.item_listview, null);          holder = new ViewHolder();          holder.content = (TextView) convertView                  .findViewById(R.id.item_listview_content);          holder.checkBox = (CheckBox) convertView                  .findViewById(R.id.item_listview_checkbox);          convertView.setTag(holder);      } else {          holder = (ViewHolder) convertView.getTag();      }        holder.content              .setText(data.get(position).get("content").toString());      holder.checkBox.setChecked(isSelected.get(position));      holder.checkBox.setOnClickListener(new OnClickListener() {          @Override          public void onClick(View v) {              if (isSelected.get(position)) {                  isSelected.put(position, false);              } else {                  isSelected.put(position, true);              }              notifyDataSetChanged();          }      });        return convertView;  }  最後再定義一個xml的adapter