城市的二级联动

package com.qian.tourism.activity;import java.util.List;import java.util.Map;import java.util.Map.Entry;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;import com.lidroid.xutils.ViewUtils;import com.lidroid.xutils.view.annotation.ViewInject;import com.qian.tourism.Data.cityname;import com.qian.tourism.Entity.Result;public class CityActivity extends Activity {@ViewInject(R.id.spinner2)private Spinner spinProvince;@ViewInject(R.id.spinner1)private Spinner spinCity;private String city="";// 声明数组适配器，用来填充城市列表private ArrayAdapter<CharSequence> adapterCity = null;StringBuffer sb = new StringBuffer();private Map<String, String> cityData;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.city);ViewUtils.inject(this);cityData = cityname.getCityData(this); sb.delete(0, sb.length());for (Entry<String, String> sa : cityData.entrySet()) {sb.append(",").append(sa.getKey());}// 为spinProvince控件注册OnItemSelected监听器spinProvince.setAdapter(new ArrayAdapter<CharSequence>(CityActivity.this, android.R.layout.simple_spinner_item, sb.toString().substring(1).split(",")));spinProvince.setOnItemSelectedListener(new OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> adapter, View view,int position, long id) {// Toast.makeText(getApplicationContext(),// ((TextView)view).getText().toString(),// Toast.LENGTH_LONG).show();String a = "";for (Entry<String, String> sa : cityData.entrySet()) {if (sa.getKey().equals(((TextView) view).getText().toString())) {a = sa.getValue();}}CityActivity.this.adapterCity = new ArrayAdapter<CharSequence>(CityActivity.this,android.R.layout.simple_spinner_item, a.split(","));// 使用adapterCity数据适配器填充spinCityCityActivity.this.spinCity.setAdapter(CityActivity.this.adapterCity);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {// TODO Auto-generated method stub}});spinCity.setOnItemSelectedListener(new OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> arg0, View view,int arg2, long arg3) {// TODO Auto-generated method stubcity = ((TextView) view).getText().toString();}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {// TODO Auto-generated method stub}});}public void jinru(View v) {Intent it=new Intent(CityActivity.this, MainActivity.class);Bundle bundle = new Bundle();List<Result> allData = cityname.getAllData(this);for (Result result : allData) {if(result.getCityName().equals(city)){bundle.putString("cityId", result.getCityId());bundle.putString("provinceId", result.getProvinceId());bundle.putString("cityname", result.getCityName());break;}}it.putExtras(bundle);startActivity(it);}}

和下面的读取文件类

package com.qian.tourism.Data;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Map.Entry;import java.util.Set;import java.util.TreeSet;import android.content.Context;import com.alibaba.fastjson.JSON;import com.qian.tourism.Entity.CityEntity;import com.qian.tourism.Entity.Result;public class cityname {private final static String URL = "http://apis.haoservice.com/lifeservice/travel/cityList?key=6e04704c185145dca3684e2b0f7110e7";public static Map<String, String> getCityData(Context context) {StringBuffer sb = new StringBuffer();try {InputStream open = context.getAssets().open("a.txt");String encoding = "GBK";InputStreamReader read = new InputStreamReader(open, encoding);// 考虑到编码格式BufferedReader bufferedReader = new BufferedReader(read);String lineTxt = null;while ((lineTxt = bufferedReader.readLine()) != null) {sb.append(lineTxt);}read.close();} catch (Exception e) {System.out.println("读取文件内容出错");e.printStackTrace();}//CityEntity parseObject = JSON.parseObject(sb.toString(),CityEntity.class);final List<Result> result = parseObject.getResult();Set<String> set = new TreeSet<String>();//for (Result result2 : result) {set.add(result2.getProvinceId());}Map<String, String> map = new HashMap<String, String>();String b = "";for (String string : set) {for (int i = 0; i < result.size(); i++) {Result result2 = result.get(i);if (string.equals(result2.getProvinceId())) {String a = "," + result2.getCityName();b += a;// System.out.print(a);map.put(string, b);} else {b = "";}}// System.out.println();}for (Entry<String, String> string : map.entrySet()) {string.setValue(string.getValue().substring(1));}Map<String, String> map2 = new HashMap<String, String>();for (Entry<String, String> string : map.entrySet()) {String[] split = string.getValue().split(",");String a = "";for (int i = 0; i < split.length; i++) {if (i != 0) {a += "," + split[i];}map2.put(split[0], a);}}for (Entry<String, String> string : map2.entrySet()) {string.setValue(string.getValue().substring(1));//System.out.println(string);}return map2;}public static  List<Result> getAllData(Context context) {StringBuffer sb = new StringBuffer();try {InputStream open = context.getAssets().open("a.txt");String encoding = "GBK";InputStreamReader read = new InputStreamReader(open, encoding);// 考虑到编码格式BufferedReader bufferedReader = new BufferedReader(read);String lineTxt = null;while ((lineTxt = bufferedReader.readLine()) != null) {sb.append(lineTxt);}read.close();} catch (Exception e) {System.out.println("读取文件内容出错");e.printStackTrace();}//CityEntity parseObject = JSON.parseObject(sb.toString(),CityEntity.class);return parseObject.getResult();}}