ListView中的CheckedTextView 多选/单

实现ListView中多选按纽选中或取消 有很多种方式 本实例根据查看ApiDemos 通过自定义Adaper实现的。如图：Item是由两个控件组成的。代码片段：1. item的布局：list_checktextview.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="horizontal">
<ImageView android:src="@drawable/ic_launcher"
android:layout_width="wrap_content" android:layout_height="wrap_content"/>
<CheckedTextView
android:id="@+id/checktv_title"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:textAppearance="?android:attr/textAppearanceLarge"
android:gravity="center_vertical"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:paddingLeft="6dip"
android:paddingRight="6dip"
/>
<!-- 单选
android:checkMark="?android:attr/listChoiceIndicatorSingle"
-->
</LinearLayout>

2. Activity中的实现

package com.test.activity;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;
public class ListCheckedTextView extends ListActivity {
private ArrayList<HashMap<String,String>> arrlist = new ArrayList<HashMap<String,String>>();
private ListView listView;
private HashMap<Integer,Boolean> checkedMap = new HashMap<Integer, Boolean>();

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

getdata();

/* 设置ListView的适配器
有两种方式加载含CheckedTextView的多选模式并响应事件
1. 但是这种方式，选择多选响应事件时 各个Item会出现乱弹的现象，不知道为什么 希望各位大虾帮帮忙
//适配器设置
setListAdapter(new SimpleAdapter(this, arrlist, R.layout.list_checktextview, new String[]{"title"}, new int[]{R.id.checktv_title}));
//listview的监听事件
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
checktv = (CheckedTextView) parent.getChildAt(position).findViewById(R.id.checktv_title);
if(checktv.isChecked()){
checktv.setChecked(false);
}else{
checktv.setChecked(true);
}
}
});
2. 通过自定义Adapter实现 如下，
*/
setListAdapter(new MyAdapter(this, arrlist));

listView = getListView();
listView.setItemsCanFocus(false);
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
//        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);//单选

listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
/*对于由position指定的项目，返回其是否被选中。
* 只有当选择模式已被设置为CHOICE_MODE_SINGLE或CHOICE_MODE_MULTIPLE时 ，结果才有效。
*/
boolean checked = getListView().isItemChecked(position);
checkedMap.put(position,checked);
}
});
}

//构造数据
private ArrayList<HashMap<String,String>> getdata(){
HashMap<String,String> map = new HashMap<String, String>();
map.put("title", "aaaa");
arrlist.add(map);
map = new HashMap<String, String>();
map.put("title", "bbbb");
arrlist.add(map);
map = new HashMap<String, String>();
map.put("title", "cccc");
arrlist.add(map);
return arrlist;
}

//自定义Adapter,从checkMap中获取当前Item的状态 并设置
private class MyAdapter extends BaseAdapter{
private LayoutInflater inflater ;
ArrayList<HashMap<String,String>> datalist;

public MyAdapter(Context context , ArrayList<HashMap<String,String>> datalist){
super();
inflater = LayoutInflater.from(context);
this.datalist = datalist;
}

@Override
public int getCount() {
return datalist.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
convertView = inflater.inflate(R.layout.list_checktextview, null);
holder = new ViewHolder();
holder.checktv_title = (CheckedTextView) convertView.findViewById(R.id.checktv_title);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}

holder.checktv_title.setText(datalist.get(position).get("title").toString());
//根据checkMap中position的状态设置是否被选中
if (checkedMap.get(position) != null && checkedMap.get(position) == true) {
holder.checktv_title.setChecked(true);
}else{
holder.checktv_title.setChecked(false);
}

return convertView;
}

class ViewHolder {
CheckedTextView checktv_title;
}
}
}

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