下拉选择框 Spinner的用法。

代码如下：

 package com.lixu.xialakuang;

 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.Spinner;
 import android.widget.TextView;

 public class MainActivity extends Activity {
     TextView tv2;
     TextView tv3;

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

         final String[] start = this.getResources().getStringArray(R.array.start);
         final String[] target = this.getResources().getStringArray(R.array.target);

         Spinner spinner1 = (Spinner) findViewById(R.id.sp1);
         Spinner spinner2 = (Spinner) findViewById(R.id.sp2);

         tv2 = (TextView) findViewById(R.id.tv2);
         tv3 = (TextView) findViewById(R.id.tv3);

         tv2.setTextSize(20);
         tv3.setTextSize(20);

         MyAdapterr mMyAdapterr = new MyAdapterr(this, -1, target);

         MyAdapterr mMyAdapter = new MyAdapterr(this, -1, start);

         spinner1.setAdapter(mMyAdapter);

         spinner2.setAdapter(mMyAdapterr);

         spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {

             @Override
             public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                 tv2.setText(target[arg2]);
             }

             @Override
             public void onNothingSelected(AdapterView<?> arg0) {
             }
         });
         spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {

             @Override
             public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
                 tv3.setText(start[arg2]);
             }

             @Override
             public void onNothingSelected(AdapterView<?> arg0) {
             }
         });

     }

     private class MyAdapterr extends ArrayAdapter {
         LayoutInflater flater;
         private Context context;
         private String[] target;
         int[] image = { R.drawable.beijing, R.drawable.chengdu, R.drawable.guangzhou, R.drawable.hangzhou,
                 R.drawable.wuhan, R.drawable.xian, R.drawable.shenzhen };

         @Override
         public int getCount() {

             return target.length;
         }

         public MyAdapterr(Context context, int resource, String[] target) {
             super(context, resource, target);
             this.context = context;
             this.target = target;
             this.image = image;
             flater = LayoutInflater.from(context);
         }

         // 设置最上面选中列表的view
         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
             if (convertView == null)
                 convertView = flater.inflate(R.layout.list, null);
             ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
             iv.setImageResource(image[position]);

             TextView tv = (TextView) convertView.findViewById(R.id.tv1);
             tv.setBackgroundColor(Color.RED);

             tv.setText(target[position]);
             return convertView;
         }

         // 设置下拉列表的 view 如果不写这个方法会报 Resources$NotFoundException: Resource ID
         // #0xffffffff这个错误

         @Override
         public View getDropDownView(int position, View convertView, ViewGroup parent) {
             if (convertView == null)
                 convertView = flater.inflate(R.layout.list, null);
             ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
             iv.setImageResource(image[position]);

             TextView tv = (TextView) convertView.findViewById(R.id.tv1);

             tv.setBackgroundColor(Color.GREEN);
             tv.setText(target[position]);
             return convertView;
         }
     }

     private class MyAdapter extends ArrayAdapter {

         LayoutInflater flater;
         private Context context;
         private String[] start;
         int[] image = { R.drawable.beijing, R.drawable.chengdu, R.drawable.guangzhou, R.drawable.hangzhou,
                 R.drawable.wuhan, R.drawable.xian, R.drawable.shenzhen };

         @Override
         public int getCount() {

             return start.length;
         }

         public MyAdapter(Context context, int resource, String[] target) {
             super(context, resource, target);
             this.context = context;
             this.start = start;
             flater = LayoutInflater.from(context);
         }

         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
             if (convertView == null)
                 convertView = flater.inflate(R.layout.list, null);

             ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
             iv.setImageResource(image[position]);

             TextView tv = (TextView) convertView.findViewById(R.id.tv1);
             tv.setBackgroundColor(Color.RED);
             tv.setText(start[position]);

             return convertView;
         }

         @Override
         public View getDropDownView(int position, View convertView, ViewGroup parent) {
             if (convertView == null)
                 convertView = flater.inflate(R.layout.list, null);
             ImageView iv = (ImageView) convertView.findViewById(R.id.iv1);
             iv.setImageResource(image[position]);
             TextView tv = (TextView) convertView.findViewById(R.id.tv1);

             tv.setText(start[position]);
             tv.setBackgroundColor(Color.GREEN);

             return convertView;
         }
     }
 }

xml：

 <?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="horizontal" >

     <ImageView
         android:id="@+id/iv1"
         android:layout_width="50dp"
         android:layout_height="50dp" />

     <TextView
         android:id="@+id/tv1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
         android:paddingLeft="10dp"
         android:textSize="20sp" />

 </LinearLayout>

 <?xml version="1.0" encoding="utf-8"?>
 <resources>

     <string-array name="start">
         <item>北京</item>
         <item>成都</item>
         <item>广州</item>
         <item>杭州</item>
         <item>武汉</item>
         <item>西安</item>
         <item>深圳</item>
     </string-array>
     <string-array name="target">
         <item>北京</item>
         <item>成都</item>
         <item>广州</item>
         <item>杭州</item>
         <item>武汉</item>
         <item>西安</item>
         <item>深圳</item>
     </string-array>

 </resources>

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/LinearLayout1"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.lixu.xialakuang.MainActivity" >

     <TextView
         android:id="@+id/tv2"
         android:layout_width="150dp"
         android:layout_height="50dp"
         android:layout_alignParentTop="true"
         android:gravity="center" />

     <TextView
         android:id="@+id/tv3"
         android:layout_width="150dp"
         android:layout_height="50dp"
         android:layout_toRightOf="@id/tv2"
         android:gravity="center" />

     <LinearLayout
         android:id="@+id/linearlayout"
         android:layout_width="300dp"
         android:layout_height="200dp"
         android:layout_below="@+id/tv2"
         android:layout_centerHorizontal="true"
         android:orientation="horizontal" >

         <Spinner
             android:id="@+id/sp1"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1" />

         <Spinner
             android:id="@+id/sp2"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1" />
     </LinearLayout>

 </RelativeLayout>

运行效果图：