Android(安卓)RadioButton与ListView的混合使用

布局文件很简单：         <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： RadioButton与ListView的混合使用" style="border:0px;list-style:none;;border:1px solid black;" width="360" height="360">

RadioButton与ListView的混合使用" style="border:0px;list-style:none;;border:1px solid black;" width="360" height="360">
代码链接：http://vdisk.weibo.com/s/d-PE6ROK-NCF

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