listview中radiobutton的选择问题

 

listview中radiobutton的选择问题

程序效果：

点击一整行，更换radiobutton选择。

xml代码：

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/layout"
     android:orientation="horizontal"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     >
    <TextView  android:id="@+id/list_text"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_centerVertical="true"
     />
    <ImageView android:id="@+id/list_radioImg"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_alignParentRight="true"/>
 </RelativeLayout>

 

java代码：

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import android.app.ListActivity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.ListView;
 import android.widget.SimpleAdapter;
 import android.widget.Toast;
 public class listRadioBtn extends ListActivity {
     /** Called when the activity is first created. */
     private int balanceIndex = 0;
     SimpleAdapter adapter;
     List<Map<String, Object>> list;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         adapter= new SimpleAdapter(this,getData(),R.layout.main,new String[]{"text","img"},new int[]{R.id.list_text,R.id.list_radioImg});

         setListAdapter(adapter);
     }

         private List<Map<String, Object>> getData(){
              list = new ArrayList<Map<String, Object>>();
             Map<String, Object> map_day = new HashMap<String, Object>();
             map_day.put("text", "白天");
             map_day.put("img", R.drawable.setlist_radio_on);
             list.add(map_day);

             Map<String, Object> map_clody = new HashMap<String, Object>();
             map_clody.put("text", "阴天");
             map_clody.put("img", R.drawable.setlist_radio_off);
             list.add(map_clody);

             Map<String, Object> map_clo = new HashMap<String, Object>();
             map_clo.put("text", "微风");
             map_clo.put("img", R.drawable.setlist_radio_off);
             list.add(map_clo);

             return list;
         }

         protected void onListItemClick(ListView arg0, View arg1, int arg2, long arg3) {
          Toast t = Toast.makeText(this, ""+list.get(arg2).get("text"), Toast.LENGTH_LONG);
          t.show();

              ChangeRadioImg(balanceIndex,false);
              ChangeRadioImg(arg2,true);
              balanceIndex=arg2;

              list.get(arg2).get("text");
          }

         private void ChangeRadioImg(int selectedItem, boolean b) {
             SimpleAdapter la = adapter;
             HashMap<String, Object> map = (HashMap<String, Object>)la.getItem(selectedItem);
             if(b)
                 map.put("img", R.drawable.setlist_radio_on);
             else
                 map.put("img", R.drawable.setlist_radio_off);
            la.notifyDataSetChanged();

         }

 }

 

二

另一个简单办法：

android系统中，提供了这样的方法

mylist.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

 

程序主代码：

 protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.list_layout);
         contentString = new String[] {
                 "示例", "透明动画",
                 "伸缩动画", "移动动画",
                 "旋转动画", "透明_伸缩",
                 "透明_移动", "透明_旋转"

     };
         arrayAdapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_list_item_single_choice,
                 contentString);
         mylist = (ListView) findViewById(R.id.ListView01);
         mylist.setAdapter(arrayAdapter);
         mylist.setOnItemClickListener(this);
         mylist.setOnItemSelectedListener(this);
         mylist.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
         mylist.setItemChecked(0, true);
     }

其中，android.R.layout.simple_list_item_single_choice在framework/base/core/res/res/layout目录下，可参见源码

 

 

三 多选框

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 public class ListCheckbox extends Activity implements OnItemClickListener,OnItemSelectedListener{
     private String contentString[];
     ArrayAdapter arrayAdapter;
     ListView mylist;
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         contentString = new String[] {
                 "示例", "透明动画",
                 "伸缩动画", "移动动画",
                 "旋转动画", "透明_伸缩",
                 "透明_移动", "透明_旋转"

     };
         arrayAdapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_list_item_multiple_choice,//.simple_list_item_single_choice,
                 contentString);
         mylist = (ListView) findViewById(R.id.ListView01);
         mylist.setAdapter(arrayAdapter);
         mylist.setOnItemClickListener(this);
         mylist.setOnItemSelectedListener(this);
         mylist.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);//.CHOICE_MODE_SINGLE);
         mylist.setItemChecked(0, true);
     }
     public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
         mylist.setItemChecked(arg2, true);

     }
     public void onNothingSelected(AdapterView<?> arg0) {
         // TODO Auto-generated method stub

     }
     public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
         // TODO Auto-generated method stub

     }
 }

 

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"
     >
 <ListView android:id="@+id/ListView01"
 android:layout_width="fill_parent"
  android:layout_height="fill_parent"/>
 </LinearLayout>