关于listview中checkbox问题

首先第一个问题就是滑动checkbox会导致错乱，因为复用的原因，导致上一个check的还保持原有的状态，所以没有进行处理，上下滑动，就会导致错乱，解决如下：

定义HasMap,来记录checkbox的选中状态

private static HashMap<Integer, Boolean> isSelected;

然后初始化都为未选状态

private void initDate() {
for (int i = 0; i < beans.length; i++) {
getIsSelected().put(i, false);
}
}

点击时

holder.cb.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

if (isSelected.get(position)) {
isSelected.put(position, false);
setIsSelected(isSelected);
} else {
isSelected.put(position, true);
setIsSelected(isSelected);
}
}
notifyDataSetChanged();

}
});

最后根据保存的状态值，设置选中状态

holder.cb.setChecked(getIsSelected().get(position));

以上完成错乱的bug解决，下面介绍关于数量限制的，当用户点击超过n个，则不让点方法和上面差不多，也是设置状态，不具体分开讲，请看

package com.example.listviewcheckboxdemo;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;

import com.mrwu.demo.R;

import java.util.HashMap;

public class ListViewAdapter extends BaseAdapter {

private Context context;
private String[] beans;
private int i=0;

// 用来控制CheckBox的选中状况
private static HashMap<Integer, Boolean> isSelected;
private static HashMap<Integer, Boolean> isClicked;

class ViewHolder {

TextView tvName;
CheckBox cb;
}

public ListViewAdapter(Context context, String[] beans) {
// TODO Auto-generated constructor stub
this.beans = beans;
this.context = context;
isSelected = new HashMap<Integer, Boolean>();
isClicked = new HashMap<Integer, Boolean>();
initDate();
}

private void initDate() {
for (int i = 0; i < beans.length; i++) {
getIsSelected().put(i, false);
getIsClicked().put(i, true);
}
}

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

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return beans[position];
}

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

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
// 页面
final ViewHolder holder;
String bean = beans[position];
LayoutInflater inflater = LayoutInflater.from(context);
if (convertView == null) {
convertView = inflater.inflate(
R.layout.listview_item_layout, null);
holder = new ViewHolder();
holder.cb = (CheckBox) convertView.findViewById(R.id.checkBox1);
holder.tvName = (TextView) convertView
.findViewById(R.id.tv_device_name);
convertView.setTag(holder);
} else {
// 取出holder
holder = (ViewHolder) convertView.getTag();
}

holder.tvName.setText(bean);
// 监听checkBox并根据原来的状态来设置新的状态
holder.cb.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {

if (isSelected.get(position)) {
i--;
isSelected.put(position, false);
setIsSelected(isSelected);
setAllClcik();
} else {
if (i >= 4) {
isClicked.put(position, false);
setIsClickted(isClicked);
}else {
i++;
setAllClcik();
isSelected.put(position, true);
setIsSelected(isSelected);
}
}
notifyDataSetChanged();

}
});

// 根据isSelected来设置checkbox的选中状况
holder.cb.setClickable(getIsClicked().get(position));
holder.cb.setChecked(getIsSelected().get(position));

return convertView;
}

public static HashMap<Integer, Boolean> getIsSelected() {
return isSelected;
}
public static HashMap<Integer, Boolean> getIsClicked() {
return isClicked;
}

public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {
ListViewAdapter.isSelected = isSelected;
}
public static void setIsClickted(HashMap<Integer, Boolean> isClicked) {
ListViewAdapter.isClicked = isClicked;
}
private void setAllClcik() {
for (int i = 0; i < beans.length; i++) {
getIsClicked().put(i, true);
}
}
}