Android编程开发之Spinner组件用法

<?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">  <Spinner android:id="@+id/spinner1" android:layout_width="fill_parent"   android:layout_height="wrap_content" />  <Spinner android:id="@+id/spinner2" android:layout_width="fill_parent"   android:layout_height="wrap_content" android:layout_marginTop="20dp"/></LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="horizontal" android:layout_width="fill_parent"  android:layout_height="wrap_content">  <ImageView android:id="@+id/ivLogo" android:layout_width="60dp"   android:layout_height="60dp" android:src="@drawable/icon"   android:paddingLeft="10dp" />  <TextView android:id="@+id/tvApplicationName" android:textColor="#000"   android:layout_width="wrap_content" android:layout_height="fill_parent"   android:textSize="16dp" android:gravity="center_vertical"   android:paddingLeft="10dp" /> </LinearLayout> 

import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.app.AlertDialog; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.SimpleAdapter; import android.widget.Spinner; import android.widget.AdapterView.OnItemSelectedListener; public class Main extends Activity {  @Override  public void onCreate(Bundle savedInstanceState)  {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);   //获取对象   Spinner spinner1 = (Spinner) findViewById(R.id.spinner1);   String[] applicationNames = new String[]   { "多功能日历", "eoeMarket客户端", "耐玩的重力消砖块", "白社会", "程序终结者" };   ArrayAdapter<String> aaAdapter = new ArrayAdapter<String>(this,     android.R.layout.simple_spinner_item, applicationNames);   // 将如下代码可以使列表项带RadioButton组件   // aaAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);   spinner1.setAdapter(aaAdapter);   Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);   final List<Map<String, Object>> items = new ArrayList<Map<String, Object>>();   Map<String, Object> item1 = new HashMap<String, Object>();   item1.put("ivLogo", R.drawable.calendar);   item1.put("tvApplicationName", "多功能日历");   Map<String, Object> item2 = new HashMap<String, Object>();   item2.put("ivLogo", R.drawable.eoemarket);   item2.put("tvApplicationName", "eoeMarket客户端");   items.add(item1);   items.add(item2);   SimpleAdapter simpleAdapter = new SimpleAdapter(this, items,     R.layout.item, new String[]     { "ivLogo", "tvApplicationName" }, new int[]     { R.id.ivLogo, R.id.tvApplicationName });   spinner2.setAdapter(simpleAdapter);   //为Spinner2加上监听事件   spinner2.setOnItemSelectedListener(new OnItemSelectedListener()   {    @Override    public void onItemSelected(AdapterView<?> parent, View view,      int position, long id)    {      new AlertDialog.Builder(view.getContext()).setTitle(        items.get(position).get("tvApplicationName")          .toString()).setIcon(        Integer.parseInt(items.get(position).get("ivLogo")         .toString())).show();    }    @Override    public void onNothingSelected(AdapterView<?> parent)    {   }   });  } }