Android中ListView与CheckBox结合----多选与记录

很多时候我们会用到ListView与CheckBox结合的东西，比如一个清单，可以用来多选，但是很多人似乎也在这个地方遇到很多问题，我刚开始学的时候也是遇到假选问题，当列表中数量多的之后，我勾选一个，滑动页面会发现条目也勾选上了， 这明显与我们的要求不符合，后来网上找了找资料，用HashMap来记录一个CheckBox的勾选记录就解决了

以下是实现的的一个小Demo



 

这是XML ListView 每个item文件清单

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<RelativeLayout
android:id="@+id/outpatient_check_hospital"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5.0dip"
android:layout_marginLeft="12.599976dip"
android:layout_marginRight="12.599976dip"
android:layout_marginTop="5.0dip"
android:gravity="center_vertical"
android:background="#AAAAAA">

<LinearLayout
android:id="@+id/linear_layout_up"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10.0dip"
android:gravity="center"
android:orientation="horizontal" >

<ImageView
android:layout_width="10dip"
android:layout_height="10dip"
android:adjustViewBounds="false" />

<TextView
android:id="@+id/tv_device_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2.0"
android:text="名称"
android:textColor="#ff323232"
android:textSize="16.0sp"
android:typeface="monospace" />

<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" />

</LinearLayout>
</RelativeLayout>

</LinearLayout>

 

 

 
这是显示ListView的页面，简单初始化几个数据

public class MainActivity extends Activity {

private ListView listView;
private ListViewAdapter adapter;
private String[] beans = new String[] { "1", "2", "3", "4", "5", "6", "7",
"8", "9", "10", "11", "12", "13","14","15","16","17","18","19" };

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

initView();
}

private void initView() {
// TODO Auto-generated method stub
Log.i("htp", "beans.size:" + beans.length);
listView = (ListView) findViewById(R.id.listView1);
adapter = new ListViewAdapter(MainActivity.this, beans);
listView.setAdapter(adapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}

下面就写一个Adapter类，我们依然继承BaseAdapter类。这里我们使用一个HashMap<Integer,boolean>的键值来记录checkbox在对应位置的选中状况

package com.example.listviewcheckboxdemo;

import java.util.HashMap;
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;

public class ListViewAdapter extends BaseAdapter {

private Context context;
private String[] beans;

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

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>();
// 初始化数据
initDate();
}

// 初始化isSelected的数据
private void initDate() {
for (int i = 0; i < beans.length; i++) {
getIsSelected().put(i, false);
}
}

@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
ViewHolder holder;
String bean = beans[position];
LayoutInflater inflater = LayoutInflater.from(context);
if (convertView == null) {
convertView = inflater.inflate(
R.layout.assist_device_binding_list_item, 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)) {
isSelected.put(position, false);
setIsSelected(isSelected);
} else {
isSelected.put(position, true);
setIsSelected(isSelected);
}

}
});

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

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

public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {
ListViewAdapter.isSelected = isSelected;
}
}