Android攻城狮spinner实现下拉列表

  1 package com.example.zy_spanner;
  2 
  3 import java.util.ArrayList;
  4 import java.util.HashMap;
  5 import java.util.List;
  6 import java.util.Map;
  7 
  8 import android.support.v7.app.ActionBarActivity;
  9 import android.support.v7.app.ActionBar;
 10 import android.support.v4.app.Fragment;
 11 import android.app.Activity;
 12 import android.os.Bundle;
 13 import android.view.LayoutInflater;
 14 import android.view.Menu;
 15 import android.view.MenuItem;
 16 import android.view.View;
 17 import android.view.ViewGroup;
 18 import android.widget.AdapterView;
 19 import android.widget.AdapterView.OnItemClickListener;
 20 import android.widget.AdapterView.OnItemSelectedListener;
 21 import android.widget.ArrayAdapter;
 22 import android.widget.SimpleAdapter;
 23 import android.widget.Spinner;
 24 import android.widget.TextView;
 25 import android.os.Build;
 26 
 27 public class MainActivity extends Activity implements OnItemSelectedListener {
 28     private TextView textView,textView2;
 29     private Spinner spinner,spinner2;
 30     private List<String> list;
 31     private ArrayAdapter<String> adapter;
 32     
 33     
 34     private SimpleAdapter adapter2;
 35     private List<Map<String, Object>> datalist;
 36 
 37     @Override
 38     protected void onCreate(Bundle savedInstanceState) {
 39         super.onCreate(savedInstanceState);
 40         setContentView(R.layout.fragment_main);
 41         textView = (TextView) findViewById(R.id.textview1);
 42         textView2 = (TextView) findViewById(R.id.textview);
 43         textView.setText("您选择的城市是：重庆");
 44         textView2.setText("您选择的城市是：重庆");
 45         spinner = (Spinner) findViewById(R.id.spinner1);
 46         spinner2= (Spinner) findViewById(R.id.spinner);
 47         // 1.设置数据源
 48         list = new ArrayList<String>();
 49         list.add("重庆");
 50         list.add("北京");
 51         list.add("上海");
 52         list.add("广州");
 53         // 2.新建ArrayAdapter(数组适配器)
 54         adapter = new ArrayAdapter<String>(this,
 55                 android.R.layout.simple_spinner_item, list);
 56         // 3.adapter设置一个下拉列表
 57         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
 58         // 4.spinner加载适配器
 59         spinner.setAdapter(adapter);
 60         // 5.Spinner设置监听器
 61         spinner.setOnItemSelectedListener(this);
 62 
 63         // --------------------------------------
 64         datalist = new ArrayList<Map<String, Object>>();
 65     
 66         
 67         adapter2 = new SimpleAdapter(this,     getDate(), R.layout.item,
 68                 new String[] { "image", "text" }, new int[] { R.id.imageView2,
 69                         R.id.textView2 });
 70 
 71         adapter2.setDropDownViewResource(R.layout.item);
 72         spinner2.setAdapter(adapter2);
 73         spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {
 74 
 75             @Override
 76             public void onItemSelected(AdapterView<?> parent, View view,
 77                     int position, long id) {
 78                 // TODO Auto-generated method stub
 79                 textView2.setText("您选择的城市是："+adapter2.getItem(position));
 80             }
 81 
 82             @Override
 83             public void onNothingSelected(AdapterView<?> parent) {
 84                 // TODO Auto-generated method stub
 85                 textView2.setText("none");
 86             }
 87         });
 88     }
 89 
 90     
 91     @Override
 92     public void onItemSelected(AdapterView<?> parent, View view, int position,
 93             long id) {
 94         // TODO Auto-generated method stub
 95         String cityName = adapter.getItem(position);
 96         // String cityName=list.get(position);
 97         textView.setText("您选择的城市是：" + cityName);
 98     }
 99 
100     @Override
101     public void onNothingSelected(AdapterView<?> parent) {
102         // TODO Auto-generated method stub
103 
104     }
105     
106     
107     
108 private List<Map<String, Object>> getDate(){
109     Map<String, Object> map=new HashMap<String, Object>();
110     map.put("image", R.drawable.ic_launcher);
111     map.put("text", "重庆");
112     
113     Map<String, Object> map1=new HashMap<String, Object>();
114     map1.put("image", R.drawable.ic_launcher);
115     map1.put("text", "上海");
116     
117     Map<String, Object> map2=new HashMap<String, Object>();
118     map2.put("image", R.drawable.ic_launcher);
119     map2.put("text", "北京");
120     
121     Map<String, Object> map3=new HashMap<String, Object>();
122     map3.put("image", R.drawable.ic_launcher);
123     map3.put("text", "广州");
124     datalist.add(map);
125     datalist.add(map1);
126     datalist.add(map2);
127     datalist.add(map3);
128     return datalist;
129 }
130 
131 }