前言：之前做的ListView實(shí)現(xiàn)RadioButton的功能有bug,當(dāng)ListView控件的內(nèi)容超出屏幕可見區(qū)域時(shí)，滑動(dòng)ListView控件會(huì)報(bào)錯(cuò)，下面有為什么出錯(cuò)和解決方法進(jìn)行的注解，不多說了，看源碼，有更好的解決辦法請指教

1，MainActivity.java

package com.excetop.listradio;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends Activity {
    private static final String TAG = "MainActivity";
    private ListView listView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        listView = (ListView) this.findViewById(R.id.list);
        MyAdapter adapter = new MyAdapter();
        listView.setAdapter(adapter);
    }
    private class MyAdapter extends BaseAdapter{
        private String[] s = new String[]{"a","b","c","d","e","a","b","c","d","e","a","b","c","d","e","a","b","c","d","e"};
        private int temp = -1;

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

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

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            convertView = MainActivity.this.getLayoutInflater().inflate(R.layout.item, null);  //解決辦法： 每次都重新獲取View
            Button button = (Button) convertView.findViewById(R.id.button);
            button.setText(s[position]);
            RadioButton radioButton = (RadioButton) convertView.findViewById(R.id.radioButton);
            radioButton.setId(position);  //把position設(shè)為radioButton的id
            radioButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    
                    if(isChecked){
                        //這段代碼來實(shí)現(xiàn)單選功能
                        if(temp != -1){
                            RadioButton tempButton = (RadioButton) MainActivity.this.findViewById(temp);
                            if(tempButton != null){
                               tempButton.setChecked(false);
                            }
                            
                        }
                        
                        temp = buttonView.getId();
                        Log.i(TAG,"you are women- -   " + isChecked + "   " + temp);
                        
                    }
                }
            });
            
            //這里實(shí)現(xiàn)單選框選的回顯，解決了單選框移出屏幕范圍未選中狀態(tài)
            if(temp == position){
                radioButton.setChecked(true);
            }
            return convertView;
        }
//            Holder holder;
//            if(convertView == null){    //1，當(dāng)?shù)谝淮渭虞dListView控件時(shí)  convertView為空 
//                convertView = MainActivity.this.getLayoutInflater().inflate(R.layout.item, null); //所以當(dāng)ListView控件沒有滑動(dòng)時(shí)都會(huì)執(zhí)行這條語句
//                holder = new Holder();
//                convertView.setTag(holder);
//            }else{
//                holder = (Holder) convertView.getTag();
//            }
//            
//            holder.button = (Button) convertView.findViewById(R.id.button);
//            holder.button.setText(s[position]);
//            
//            holder.radioButton = (RadioButton) convertView.findViewById(R.id.radioButton);   //
//            holder.radioButton.setId(position);  //2，因?yàn)檫@里對(duì)radioButton的id進(jìn)行重新設(shè)置,滑動(dòng)ListView時(shí)convertView不為空，上面的語句就沒法得到radioButton對(duì)象，這條語句就會(huì)報(bào)空指針異常
          
//            holder.radioButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {
//                
//                @Override
//                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//                    
//                    if(isChecked){
//                        if(temp != -1){
//                            RadioButton tempButton = (RadioButton) MainActivity.this.findViewById(temp);
//                            tempButton.setChecked(false);
//                            
//                        }
//                        
//                        temp = buttonView.getId();
//                        Log.i(TAG,"you are women- -   " + isChecked + "   " + temp);
//                        
//                    }
//                }
//            });
//            return convertView;
//        }
//        private class Holder{
//            private Button button;
//            private RadioButton radioButton;
//        }
    }
}

2，item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">
  <Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="測試">
  
  </Button>
  
  <RadioButton
    android:id="@+id/radioButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />  
 
</LinearLayout>
3, main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
    <ListView
       android:id="@+id/list"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       />
</LinearLayout>

一，Layout

1，main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
    <ListView
       android:id="@+id/list"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       />
</LinearLayout>

2，item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">
  <Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="測試">
  
  </Button>
  
  <CheckBox
    android:id="@+id/checkBox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />  
 
</LinearLayout>

二，Activity

1，MainActivity

package com.excetop.listradio;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends Activity {
 private static final String TAG = "MainActivity";
    private ListView listView;
    private Map checkMap;
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        listView = (ListView) this.findViewById(R.id.list);
        
        checkMap = new HashMap<String, Object>();
        
        MyAdapter adapter = new MyAdapter();
        listView.setAdapter(adapter);
      
    }
 private class MyAdapter extends BaseAdapter{
  private String[] s = new String[]{"a","b","c","d","e","a","b","c","d","e","a","b","c","d","e","a","b","c","d","e"};

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

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

  @Override
  public long getItemId(int position) {
   // TODO Auto-generated method stub
   return 0;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   convertView = MainActivity.this.getLayoutInflater().inflate(R.layout.item, null);  //解決辦法： 每次都重新獲取View
   Button button = (Button) convertView.findViewById(R.id.button);
   button.setText(s[position]);
   final CheckBox checkBox =  (CheckBox) convertView.findViewById(R.id.checkBox);
   checkBox.setId(position);  //把position設(shè)為radioButton的id
   checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
    
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
     
     if(isChecked){
      
      checkMap.put(String.valueOf(checkBox.getId()), checkBox.getId());
//      Toast.makeText(MainActivity.this, String.valueOf( checkBox.getId()), 0).show();
     
     }else{
      checkMap.remove(String.valueOf(checkBox.getId()));
//      Toast.makeText(MainActivity.this, String.valueOf( checkBox.getId()), 0).show();
     }
    }
   });
   
   if(checkMap.get(String.valueOf(position)) != null){
    checkBox.setChecked(true);
//    Toast.makeText(MainActivity.this, String.valueOf(String.valueOf(position)), 0).show();
   }
   
   //這里實(shí)現(xiàn)單選框選的回顯，解決了單選框移出屏幕范圍未選中狀態(tài)
   return convertView;
  }
 }
}