1 package com.example.homeworkday04_2;
2
3 import java.util.ArrayList;
4 import java.util.HashMap;
5 import java.util.LinkedHashMap;
6 import java.util.List;
7 import java.util.Map;
8
9 import android.os.Bundle;
10 import android.R.string;
11 import android.app.Activity;
12 import android.util.Log;
13 import android.view.View;
14 import android.widget.AdapterView;
15 import android.widget.AdapterView.OnItemSelectedListener;
16 import android.widget.ArrayAdapter;
17 import android.widget.Spinner;
18
19 public class MainActivity extends Activity {
20 private Spinner provinceSpinner = null; // 省级（省、直辖市）
21 private Spinner citySpinner = null; // 地级市
22 private Spinner countySpinner = null; // 县级（区、县、县级市）
23 ArrayAdapter<String> provinceAdapter = null; // 省级适配器
24 ArrayAdapter<String> cityAdapter = null; // 地级适配器
25 ArrayAdapter<String> countyAdapter = null; // 县级适配器
26 private Map<String, Map<String, ArrayList<String>>> map = new HashMap<String, Map<String, ArrayList<String>>>();
27 Map<String, ArrayList<String>> map2 = new HashMap<String, ArrayList<String>>();
28 Map<String, ArrayList<String>> map3 = new HashMap<String, ArrayList<String>>();
29
30 protected void onCreate(Bundle savedInstanceState) {
31 super.onCreate(savedInstanceState);
32 setContentView(R.layout.activity_main);
33 ArrayList<String> counties = new ArrayList<String>();
34 counties.add("郑州a区");
35 counties.add("郑州b区");
36 counties.add("郑州c区");
37 map2.put("郑州", counties);
38 ArrayList<String> counties1 = new ArrayList<String>();
39 counties1.add("洛阳a区");
40 counties1.add("洛阳b区");
41 counties1.add("洛阳c区");
42 map2.put("洛阳", counties1);
43 map.put("河南", map2);
44 ArrayList<String> counties2 = new ArrayList<String>();
45 counties2.add("保定a区");
46 counties2.add("保定b区");
47 counties2.add("保定c区");
48 map3.put("保定", counties2);
49 ArrayList<String> counties3 = new ArrayList<String>();
50 counties3.add("石家庄a区");
51 counties3.add("石家庄b区");
52 counties3.add("石家庄区c");
53 map3.put("石家庄", counties3);
54 map.put("河北", map3);
55 provinceSpinner = (Spinner) findViewById(R.id.spinner1);
56 citySpinner = (Spinner) findViewById(R.id.spinner2);
57 countySpinner = (Spinner) findViewById(R.id.spinner3);
58 // 省市联动
59 List<String> provicesList = new ArrayList<String>(map.keySet());
60 provinceAdapter = new ArrayAdapter<String>(this,
61 android.R.layout.simple_spinner_item, provicesList);
62 provinceSpinner.setAdapter(provinceAdapter);
63 provinceSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
64
65 @Override
66 public void onItemSelected(AdapterView<?> parent, View view,
67 int position, long id) {
68 // TODO Auto-generated method stub
69 String string = (String) parent.getItemAtPosition(position);
70 map2 = map.get(string);// 获得市县级联动map 这里可以重写一个map 因为省市的原因就拿来用了
71 // 他把原来的 覆盖了
72 List<String> cityList = new ArrayList<String>(map2.keySet());// 或得市列表
73 cityAdapter = new ArrayAdapter<String>(MainActivity.this,
74 android.R.layout.simple_spinner_item, cityList);
75 citySpinner.setAdapter(cityAdapter);
76
77 }
78
79 @Override
80 public void onNothingSelected(AdapterView<?> parent) {
81 // TODO Auto-generated method stub
82
83 }
84 });
85 // 市县级联动监听
86 citySpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
87
88 @Override
89 public void onItemSelected(AdapterView<?> parent, View view,
90 int position, long id) {
91 // TODO Auto-generated method stub
92 String string = (String) parent.getItemAtPosition(position);
93 System.out.println(string);
94 List<String> countylList = map2.get(string);
95 System.out.println(countylList.toString());
96
97 countyAdapter = new ArrayAdapter<String>(MainActivity.this,
98 android.R.layout.simple_spinner_item, countylList);
99 countySpinner.setAdapter(countyAdapter);
100
101 }
102
103 @Override
104 public void onNothingSelected(AdapterView<?> parent) {
105 // TODO Auto-generated method stub
106
107 }
108 });
109
110 }
111
112 }
在有限的人生中，你总是在追寻更大的世界，
在忙碌中，赢得更多人生财富，
也在前进中，扩展生命的宽度，
活在当下，去收获更多激情，也活出自我，懂得放弃更多，每一次的自由，让心更辽阔，
你走得越远，就越知道，
世界再大，总有牵挂，
因为，爱，一直都在！