ListView+CheckBox 选中状态错乱问题

最近在开发一个功能，需要选中ListView的item第一次使用这个组合，遇到一个问题 如图：

虽然能返回实际选中的值 但是下面的部分item也会被选中
状态错乱!
代码：
第二个activity

public class Main2Activity extends AppCompatActivity {    private ListView listView;    private Button btn;    private List<Map<String, String>> listdata = new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        btn = (Button) findViewById(R.id.btn1);        listView = (ListView) findViewById(R.id.listview);        initdata();        final ListAdapter adapter = new ListAdapter(this, listdata);        listView.setAdapter(adapter);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Info.value = "";                Iterator<Integer> iterator = adapter.isSelected.keySet().iterator();                while (iterator.hasNext()) {                    Integer next = iterator.next();                    Boolean able = adapter.isSelected.get(next);                    if (able) {                        Info.value += listdata.get(next).get("value");                    }                }                finish();            }        });    }    private void initdata() {        listdata = new ArrayList<>();        for (int i = 0; i < 50; i++) {            Map<String, String> map = new HashMap<>();            map.put("value", "value" + i);            listdata.add(map);        }    }}

adapter

public class ListAdapter extends BaseAdapter implements View.OnClickListener {    private Context context;    private List<Map<String, String>> listdata ;    public  HashMap<Integer, Boolean> isSelected;    private ViewHolder holder;    public ListAdapter(Context context,List<Map<String, String>> listdata){        super();        this.context = context;        this.listdata = listdata;        init_1();    }    private void init_1() {        if (isSelected == null) {            isSelected = new HashMap<Integer, Boolean>();            for (int i = 0; i < listdata.size(); i++) {                isSelected.put(i, false);            }        }    }    @Override    public int getCount() {        return listdata.size();    }    @Override    public Object getItem(int position) {        return listdata.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        if (convertView == null) {            holder = new ViewHolder();            convertView = LayoutInflater.from(context).inflate(R.layout.list_item, null);            holder.name = (TextView) convertView.findViewById(R.id.tv_1);            holder.check_state = (CheckBox) convertView.findViewById(R.id.check_state);            // 将holder绑定到convertView            convertView.setTag(holder);        } else {            holder = (ViewHolder) convertView.getTag();        }        holder.name.setText(listdata.get(position).get("value"));        holder.check_state.setTag(position);// setTag的对象是position，以便下面的onClick使用        holder.check_state.setOnClickListener(this);        return convertView;    }    @Override    public void onClick(View v) {        Integer tag = (Integer) v.getTag();        if (isSelected.get(tag)) {// 先判断isSelected中是否已经选中            // 选中就置为false，即不选中            isSelected.put(tag, false);        } else {            // 选中            isSelected.put(tag, true);        }        notifyDataSetChanged();    }    class ViewHolder {        private TextView name;        private CheckBox check_state;    }}

Info.java

public class Info {    public static Map<Integer, Boolean> isSelect = null;    public static String value = "";}

状态错乱了，既然状态错乱，那就自己创建一个集合保存checkBox的状态 其实集合在上述代码中已经创建了，对 就是isSelected，通过这个集合里面的值来判断checkbox的状态就好了，物尽其用;

 holder.check_state.setChecked(isSelected.get(position));

在上面的adapter里面加入这一行代码，完美决绝

推荐大家也看一下这篇博客：错乱的原因解释的很到位，我就不多说了
Android ListView CheckBox状态错乱