Listview Checkbox错乱问题

在listview中用其他控件可能没有出现复用的问题，但如何有checkbox或者点击改变背景则会发现下面的条目也随着改变了。

解决办法：
设置一个Map集合，用于保存第一个listview中数据的选中与否状态，然后根据这个状态设置给checkbox的状态，这样就不会混乱了。
第一步：Map

 public  Map<Integer,Boolean> isCheck = null;

第二步：初始化Map,把当前listview中数据给map的key,把value全部设置成false;

private void initMap(){
        for (int i = 0; i < list.size(); i++) {
            isCheck.put(i, false);
        }
    }

在点击checkbox的时候改变map的选中状态（在代码中把cb的点击事件给layout的整个item了）

  vh.layout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(vh.cb.isChecked()){
                    vh.cb.setChecked(false);
                }else{
                    vh.cb.setChecked(true);
                }
            }
        });
        vh.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    isCheck.put(position, true);
                } else {
                    isCheck.put(position, false);
                }
            }
        });

最后，才能设置checkbox的选状态，这个状态从map中取出

 vh.cb.setChecked(isCheck.get(position));

全部代码如下
在Activity中

public class MainActivity extends AppCompatActivity  {
    private MyAdapter adapter;

    private ListView listView;

    private ArrayList list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        list=new ArrayList();
        listView=(ListView)findViewById(R.id.listview);
        initData();
        adapter=new MyAdapter(this,list);
        listView.setAdapter(adapter);
    }
    private void initData() {
        for(int i=0;i<20;i++){
            list.add("this is item"+i);
        }
    }

}

---

在Adapter中

public class MyAdapter extends BaseAdapter {
    public  Map isCheck = null;
    private Context context;
    private ArrayList list;

    public MyAdapter(Context context, ArrayList list) {
        this.context = context;
        this.list = list;
        isCheck = new HashMap();
        initMap();
    }
    private void initMap(){
        for (int i = 0; i < list.size(); i++) {
            isCheck.put(i, false);
        }
    }
    @Override
    public int getCount() {
        return list.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) {
        final ViewHolder vh;
        if (convertView == null) {
            vh = new ViewHolder();
            convertView = LayoutInflater.from(context).inflate(R.layout.item, null);
            vh.tv = (TextView) convertView.findViewById(R.id.tv_text);
            vh.cb = (CheckBox) convertView.findViewById(R.id.cb);
            vh.layout= (LinearLayout) convertView.findViewById(R.id.layout);
            convertView.setTag(vh);
        } else {
            vh = (ViewHolder) convertView.getTag();
        }
        vh.layout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(vh.cb.isChecked()){
                    vh.cb.setChecked(false);
                }else{
                    vh.cb.setChecked(true);
                }
            }
        });
        vh.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    isCheck.put(position, true);
                } else {
                    isCheck.put(position, false);
                }
            }
        });
        vh.tv.setText("this is item" + position);
        vh.cb.setChecked(isCheck.get(position));
        return convertView;
    }
    public static final class ViewHolder {
        TextView tv;
        CheckBox cb;
        LinearLayout layout;
    }

}

2、还有一种情况就是点击item有变动背景的，比如点击后灰色，上面滑动也会出现背景错乱的问题

原因在listview的getView中没有else, 在listview的getView中如果写了if，就必须有else,要不就会出现各种问题（下面是显示聊天界面中有未读消息数和红点的显示getView）

    public View getView(int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = LinearLayout.inflate(context, R.layout.item_chatlist,
                    null);
            holder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);
            holder.tv_time = (TextView) convertView.findViewById(R.id.tv_time);
            holder.tv_content = (TextView) convertView
                    .findViewById(R.id.tv_content);
            holder.tv_count = (TextView) convertView
                    .findViewById(R.id.tv_count);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        ChatListBean.Data chatList = chatData.get(position);
        System.out.println("++++" + chatData.size());
        holder.tv_name.setText("与  " + chatList.getPatName() + " 的回答");
        holder.tv_time.setText(chatList.getLateTime());
        holder.tv_content.setText(chatList.getContent());
        if (Integer.parseInt(chatList.getNewCount()) == 0) {
            holder.tv_count.setVisibility(View.INVISIBLE);
            holder.tv_count.setBackgroundColor(Color.parseColor("#ffffff"));
        } else {
            holder.tv_count.setVisibility(View.VISIBLE);
            holder.tv_count.setText(chatList.getNewCount());
            holder.tv_count.setBackgroundResource(R.drawable.count_round);
        }
        return convertView;
    }

checkbox的as代码下载地址
http://download.csdn.net/detail/androidxiaogang/9514909