android 应用之listview添加radiobutton
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>
<?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>
listRadioBtn.java
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);
}
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
ListCheckbox.java
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>
<?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>
