android 应用之listview添加radiobutton,获取textView
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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>
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