LIstView中CheckedTextView的应用

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

<p><span style="font-family: 'comic sans ms';"> <?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="</span><a target=_blank href="http://schemas.android.com/apk/res/android" rel="nofollow" style="color: rgb(51, 102, 153); text-decoration: none;"><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">http://schemas.android.com/apk/res/android</span></a><span style="font-family: 'comic sans ms';">"    android:layout_width="fill_parent" android:layout_height="fill_parent"    android:orientation="horizontal"></span></p><p><span style="font-family: 'comic sans ms';">    <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></span></p>

2. Activity中的实现

<p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">package com.test.activity;</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">import java.util.ArrayList;import java.util.HashMap;</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">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;</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">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();  }</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">  @Override  public Object getItem(int position) {   return position;  }</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">  @Override  public long getItemId(int position) {   return position;  }</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">  @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;  }    }</span></p><p><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);">} </span></p><div><span style="font-family: 'comic sans ms'; color: rgb(0, 0, 0);"></span></div>