Android RadioButton与ListView的混合使用

布局文件很简单：

   

    <<span style="text-indent: 2em;">LinearLayout xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:layout_marginLeft="10dp"

    android:layout_marginRight="10dp"

    android:orientation="vertical" >

   

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:gravity="center"

        android:text="@string/select_authors"

        android:textSize="25sp" />

   

        android:id="@+id/list"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:scrollbars="none" />

ItemList也不复杂：

   

    

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

   

        android:id="@+id/author"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_centerVertical="true"

        android:text="@string/author_name"

        android:textSize="20sp"/>

   

        android:id="@+id/radio"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" 

        android:layout_alignParentRight="true"

        android:layout_centerVertical="true"/>

RadioButtonList 类，这里我写了一些自己喜欢的作家（当然我也很喜欢和大家交流一些文学作品）作为模拟数据。

package com.example.radiobuttonlisttest;

import android.app.Activity;

import android.os.Bundle;

import android.widget.ListView;

public class RadioButtonList extends Activity {

private ListView radioButtonList;

private RadioAdapter adapter;

// 模拟几个数据，作为List的条目

private String[] authors = { "芥川龙之介", "三岛由纪夫", "川端康成", "村上春树", "东野圭吾",

"张爱玲", "金庸", "钱钟书", "老舍", "梁实秋", "亨利米勒", "海明威", "菲兹杰拉德", "凯鲁亚克",

"杰克伦敦", "小仲马", "杜拉斯", "福楼拜", "雨果", "巴尔扎克", "莎士比亚", "劳伦斯", "毛姆",

"柯南道尔", "笛福" };

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_radio_button_list);

radioButtonList = (ListView) findViewById(R.id.list);

adapter = new RadioAdapter(this, authors);

radioButtonList.setAdapter(adapter);

}

}

适配器是最关键的，标记好选择的位置，选中状态不会因为ListView的滑动而出现混乱：

package com.example.radiobuttonlisttest;

import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.CompoundButton;

import android.widget.CompoundButton.OnCheckedChangeListener;

import android.widget.RadioButton;

import android.widget.TextView;

import android.widget.Toast;

public class RadioAdapter extends BaseAdapter {

private LayoutInflater inflater;

private String[] authors;

private viewHolder holder;

// 标记用户当前选择的那一个作家

private int index = -1;

private Context c;

public RadioAdapter(Context c, String[] authors) {

super();

this.c = c;

this.authors = authors;

inflater = LayoutInflater.from(c);

}

@Override

public int getCount() {

return authors.length;

}

@Override

public Object getItem(int position) {

return null;

}

@Override

public long getItemId(int position) {

return 0;

}

@Override

public View getView(final int position, View convertView, ViewGroup parent) {

holder = new viewHolder();

if (convertView == null) {

convertView = inflater.inflate(R.layout.item_list, null);

holder.nameTxt = (TextView) convertView.findViewById(R.id.author);

holder.selectBtn = (RadioButton) convertView

.findViewById(R.id.radio);

convertView.setTag(holder);

} else {

holder = (viewHolder) convertView.getTag();

}

holder.nameTxt.setText(authors[position]);

holder.selectBtn

.setOnCheckedChangeListener(new OnCheckedChangeListener() {

@Override

public void onCheckedChanged(CompoundButton buttonView,

boolean isChecked) {

if (isChecked) {

Toast.makeText(c, "您选择的作家是：" + authors[position],

Toast.LENGTH_LONG).show();

index = position;

notifyDataSetChanged();

}

}

});

if (index == position) {// 选中的条目和当前的条目是否相等

holder.selectBtn.setChecked(true);

} else {

holder.selectBtn.setChecked(false);

}

return convertView;

}

public class viewHolder {

public TextView nameTxt;

public RadioButton selectBtn;

}

}

最后看看效果图：

代码链接：http://vdisk.weibo.com/s/d-PE6ROK-NCF