Android中ListView与RadioButton结合----自定义单选列表

有时候我们需要制作自定义的单选列表，但是会遇到一些问题，比如多选，假选问题，所以网上找了找资料，整理一个demo出来，贴一下代码:

<ListView
	android:id="@+id/listView1"
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	android:layout_centerHorizontal="true"
	android:layout_centerVertical="true" >
</ListView>

　　

列表中每行的内容

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="match_parent"
	android:layout_height="match_parent"
	android:orientation="vertical" >

	<RelativeLayout
		android:id="@+id/outpatient_check_hospital"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:layout_marginBottom="5.0dip"
		android:layout_marginLeft="12.599976dip"
		android:layout_marginRight="12.599976dip"
		android:layout_marginTop="5.0dip"
		android:gravity="center_vertical" 
		android:background="#AAAAAA">

		<LinearLayout
			android:id="@+id/linear_layout_up"
			android:layout_width="fill_parent"
			android:layout_height="wrap_content"
			android:layout_margin="10.0dip"
			android:gravity="center"
			android:orientation="horizontal" >

			<ImageView
				android:layout_width="10dip"
				android:layout_height="10dip"
				android:adjustViewBounds="false" />

			<TextView
				android:id="@+id/tv_device_name"
				android:layout_width="wrap_content"
				android:layout_height="wrap_content"
				android:layout_weight="2.0"
				android:text="名称"
				android:textColor="#ff323232"
				android:textSize="16.0sp"
				android:typeface="monospace" />

			<RadioButton
				android:id="@+id/rb_light"
				android:layout_width="wrap_content"
				android:layout_height="wrap_content"
				android:focusable="false"
				android:text="" />
			
		</LinearLayout>
	</RelativeLayout>

</LinearLayout>

　　

使用列表的页面

public class MainActivity extends Activity {
	private ListView listView;
	private ListViewAdapter adapter;
	private String[] beans = new String[] { "1", "2", "3", "4", "5", "6", "7",
			"8", "9", "10", "11", "12", "13" };

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initView();

	}

	private void initView() {
		// TODO Auto-generated method stub
		Log.i("htp", "beans.size:" + beans.length);
		listView = (ListView) findViewById(R.id.listView1);
		adapter = new ListViewAdapter(MainActivity.this, beans);
		listView.setAdapter(adapter);
		listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
	}

　　

适配器内容,在这里面处理如何单选问题

package com.example.listviewdemo;

import java.util.HashMap;
import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.TextView;

public class ListViewAdapter extends BaseAdapter {

	private Context context;
	private String[] beans;
	// 用于记录每个RadioButton的状态，并保证只可选一个
	HashMap<String, Boolean> states = new HashMap<String, Boolean>();

	class ViewHolder {

		TextView tvName;
		RadioButton rb_state;
	}

	public ListViewAdapter(Context context, String[] beans) {
		// TODO Auto-generated constructor stub
		this.beans = beans;
		this.context = context;
	}

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

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

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

	@Override
	public View getView(final int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		// 页面
		ViewHolder holder;
		String bean = beans[position];
		LayoutInflater inflater = LayoutInflater.from(context);
		if (convertView == null) {
			convertView = inflater.inflate(
					R.layout.assist_device_binding_list_item, null);
			holder = new ViewHolder();
//			holder.rb_state = (RadioButton) convertView
//					.findViewById(R.id.rb_light);
			holder.tvName = (TextView) convertView
					.findViewById(R.id.tv_device_name);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		
		holder.tvName.setText(bean);
		final RadioButton radio=(RadioButton) convertView.findViewById(R.id.rb_light);  
	    holder.rb_state = radio;  
		holder.rb_state.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {

				// 重置，确保最多只有一项被选中
				for (String key : states.keySet()) {
					states.put(key, false);

				}
				states.put(String.valueOf(position), radio.isChecked());
				ListViewAdapter.this.notifyDataSetChanged();
			}
		});

		boolean res = false;
		if (states.get(String.valueOf(position)) == null
				|| states.get(String.valueOf(position)) == false) {
			res = false;
			states.put(String.valueOf(position), false);
		} else
			res = true;

		holder.rb_state.setChecked(res);
		return convertView;
	}
}