列表视图位置在Android上滚动时变化

我有列表视图[文本视图和复选框控制]与更多的数据.我将从列表视图中选择该项目,并在下一个活动中显示所选项目.
我的问题是,例如,如果我在列表视图中选择第20和第25项,它将在下一个活动中显示一些其他项目.这是列表视图位置在滚动时变化.

我通过点击项目上的复选框来选择一个项目.在checkBox.setonChanged监听器中,我编写了选择或不选择位置的代码.如果我选择第25项并滚动列表视图,则调用getview方法,并且checkBox.setonChanged方法更改所选位置.我最后打印logcat.

我的编码格式：

public class ListContact extends ListActivity {
  public void onCreate(Bundle icicle){
    .....
    ArrayAdapter<Model> adapter = new MyCustomArrayAdapter(this,getModel());
    setlistadapter(adapter);
  }
 ....
private List<Model> getModel() {
    List<Model> list = new ArrayList<Model>();

Iterator<String> itr = constant.selectname.iterator();
    while (itr.hasNext()) {
        list.add(get(itr.next().toString()));
    }
    return list;
}

private Model get(String s) {
    return new Model(s);
}  

}

MyCustomArrayAdapter.java：

public class MyCustomArrayAdapter extends ArrayAdapter<Model> {

    private final List<Model> list;
    private final Activity context;
    constant con ;
    public MyCustomArrayAdapter(Activity context,List<Model> list) {
        super(context,R.layout.list_layout,list);
        this.context = context;
        this.list = list;
    }

    static class ViewHolder {
        protected TextView text;
        protected CheckBox checkBox;
    }

    @Override
    public View getView(final int position,View convertView,ViewGroup parent) {

//      Log.e("getview","getview");
        View view = null;
        if (convertView == null) {
            LayoutInflater inflator = context.getLayoutInflater();
            view = inflator.inflate(R.layout.list_layout,null);
            final ViewHolder viewHolder = new ViewHolder();
            viewHolder.text = (TextView) view.findViewById(R.id.label);
            viewHolder.checkBox = (CheckBox) view.findViewById(R.id.check);
            viewHolder.checkBox.setonCheckedchangelistener(new CompoundButton.OnCheckedchangelistener() {
                        public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
//                          con = new constant();
                            Model element = (Model) viewHolder.checkBox.getTag();
                            element.setSelected(buttonView.isChecked());
//                          Log.e("MyCustomArrayAdapter.java","selectpos array list length"+constant.selectpos.size());
                            if(isChecked==true){
                                Log.e("check Box value and position  ",element.getName());
                                Log.e("position",""+position);
                                con.selectpos.set(position,1);

                            }
                            else{
                                Log.e("position unselect",""+position +"---------"+ element.getName());
                                con.selectpos.set(position,0);
                            }
                        }
                    });
            view.setTag(viewHolder);
            viewHolder.checkBox.setTag(list.get(position));
        } else {
            view = convertView;
            ((ViewHolder) view.getTag()).checkBox.setTag(list.get(position));
        }
        ViewHolder holder = (ViewHolder) view.getTag();
        holder.text.setText(list.get(position).getName());
        holder.checkBox.setChecked(list.get(position).isSelected());
        return view;
    }
}

logcat结果：

02-08 10:44:28.142: E/check Box value and position(293): AAAA  Qqq 
02-08 10:44:28.142: E/check Box value and position(293): Mobile-123
02-08 10:44:28.152: E/position(293): 0

**after scrolling the list view some other item print 0th position unselected and wrong data:**
02-08 10:44:31.962: E/position unselect(293): 0---------F212
02-08 10:44:31.962: E/position unselect(293): Home-232

解决方法

我解决了这个问题.我加了

View view = null;
  convertView = null;  //in the get view and comments the else part of
        if (convertView == null) {
                }
                /*else{
                } */