Android攻城狮spinner实现下拉列表

package com.example.zy_spanner;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.os.Build;

public class MainActivity extends Activity implements OnItemSelectedListener {
    private TextView textView,textView2;
    private Spinner spinner,spinner2;
    private List<String> list;
    private ArrayAdapter<String> adapter;
    
    
    private SimpleAdapter adapter2;
    private List<Map<String, Object>> datalist;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_main);
        textView = (TextView) findViewById(R.id.textview1);
        textView2 = (TextView) findViewById(R.id.textview);
        textView.setText("您选择的城市是：重庆");
        textView2.setText("您选择的城市是：重庆");
        spinner = (Spinner) findViewById(R.id.spinner1);
        spinner2= (Spinner) findViewById(R.id.spinner);
        // 1.设置数据源
        list = new ArrayList<String>();
        list.add("重庆");
        list.add("北京");
        list.add("上海");
        list.add("广州");
        // 2.新建ArrayAdapter(数组适配器)
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item, list);
        // 3.adapter设置一个下拉列表
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // 4.spinner加载适配器
        spinner.setAdapter(adapter);
        // 5.Spinner设置监听器
        spinner.setOnItemSelectedListener(this);

        // --------------------------------------
        datalist = new ArrayList<Map<String, Object>>();
    
        
        adapter2 = new SimpleAdapter(this,     getDate(), R.layout.item,
                new String[] { "image", "text" }, new int[] { R.id.imageView2,
                        R.id.textView2 });

        adapter2.setDropDownViewResource(R.layout.item);
        spinner2.setAdapter(adapter2);
        spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                    int position, long id) {
                // TODO Auto-generated method stub
                textView2.setText("您选择的城市是："+adapter2.getItem(position));
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub
                textView2.setText("none");
            }
        });
    }

    
    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position,
            long id) {
        // TODO Auto-generated method stub
        String cityName = adapter.getItem(position);
        // String cityName=list.get(position);
        textView.setText("您选择的城市是：" + cityName);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {
        // TODO Auto-generated method stub

    }
    
    
    
private List<Map<String, Object>> getDate(){
    Map<String, Object> map=new HashMap<String, Object>();
    map.put("image", R.drawable.ic_launcher);
    map.put("text", "重庆");
    
    Map<String, Object> map1=new HashMap<String, Object>();
    map1.put("image", R.drawable.ic_launcher);
    map1.put("text", "上海");
    
    Map<String, Object> map2=new HashMap<String, Object>();
    map2.put("image", R.drawable.ic_launcher);
    map2.put("text", "北京");
    
    Map<String, Object> map3=new HashMap<String, Object>();
    map3.put("image", R.drawable.ic_launcher);
    map3.put("text", "广州");
    datalist.add(map);
    datalist.add(map1);
    datalist.add(map2);
    datalist.add(map3);
    return datalist;
}

}