android 地区选择（省市县）

【核心代码】

package com.example.diqu;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import android.os.Bundle;
import android.app.Activity;
import android.content.res.AssetManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity implements OnWheelChangedListener, OnClickListener {

	
	protected String[] mProvinceDatas;
	protected Map<String, String[]> mCitisDatasMap = new HashMap<String, String[]>();
	protected Map<String, String[]> mDistrictDatasMap = new HashMap<String, String[]>();	
	protected Map<String, String> mZipcodeDatasMap = new HashMap<String, String>(); 
	protected String mCurrentProviceName;
	protected String mCurrentCityName;
	protected String mCurrentDistrictName ="";
	
	protected String mCurrentZipCode ="";
//	static AddStoreBean mBean;
	private ProvinceModel sheng;
	private CityModel shi;
	private DistrictModel qu;
	List<ProvinceModel> provinceList = new ArrayList<ProvinceModel>();
	private List<CityModel> shi_list;
	private List<DistrictModel> qu_list;
	
	
	private WheelView mViewProvince;
	private WheelView mViewCity;
	private WheelView mViewDistrict;
	private Button mBtnConfirm;
	private Button cancelBtn;
	
	TextView show_tv;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		show_tv = (TextView) findViewById(R.id.show_tv);
		
		mViewProvince = (com.example.diqu.WheelView) findViewById(R.id.province_wl);
		mViewCity = (com.example.diqu.WheelView) findViewById(R.id.city_wl);
		mViewDistrict = (com.example.diqu.WheelView) findViewById(R.id.district_wl);
		mBtnConfirm = (Button) findViewById(R.id.confirm_btn);
		cancelBtn = (Button) findViewById(R.id.cancelBtn);
		
		mViewProvince.addChangingListener(this);
    	mViewCity.addChangingListener(this);
    	mViewDistrict.addChangingListener(this);
    	mBtnConfirm.setOnClickListener(this);
    	cancelBtn.setOnClickListener(this);
    	
         setUpData();
		
		
	}

	private void setUpData() {
		// TODO Auto-generated method stub
		initProvinceDatas();
		mViewProvince.setViewAdapter(new ArrayWheelAdapter<String>(MainActivity.this, mProvinceDatas));		
		mViewProvince.setVisibleItems(7);
		mViewCity.setVisibleItems(7);
		mViewDistrict.setVisibleItems(7);
		updateCities();
		updateAreas();
	}

	/**
	 * 根据当前的市，更新区WheelView的信息
	 */
	private void updateAreas() {
		int pCurrent = mViewCity.getCurrentItem();
		mCurrentCityName = mCitisDatasMap.get(mCurrentProviceName)[pCurrent];
		shi=shi_list.get(pCurrent);
		
		String[] areas = mDistrictDatasMap.get(mCurrentCityName);
		if (areas == null) {
			areas = new String[] {""};
		}
		qu=shi.getDistrictList().get(0);
		qu_list=shi.getDistrictList();
		mViewDistrict.setViewAdapter(new ArrayWheelAdapter<String>(this, areas));
		mViewDistrict.setCurrentItem(0);
	}

	/**
	 * 根据当前的省，更新市WheelView的信息
	 */
	private void updateCities() {
		int pCurrent = mViewProvince.getCurrentItem();
		
		mCurrentProviceName = mProvinceDatas[pCurrent];
		
    	sheng =provinceList.get(pCurrent);
    	
		String[] cities = mCitisDatasMap.get(mCurrentProviceName);
		if (cities == null) {
			cities = new String[] { "" };
		}
		mViewCity.setViewAdapter(new ArrayWheelAdapter<String>(this, cities));
		mViewCity.setCurrentItem(0);
		shi=sheng.getCityList().get(0);
		shi_list=sheng.getCityList();
		updateAreas();
	}
	
	
	@Override
	public void onChanged(WheelView wheel, int oldValue, int newValue) {
		
		if (wheel == mViewProvince) {
			updateCities();
		} else if (wheel == mViewCity) {
			updateAreas();
		} else if (wheel == mViewDistrict) {
			mCurrentDistrictName = mDistrictDatasMap.get(mCurrentCityName)[newValue];
			mCurrentZipCode = mZipcodeDatasMap.get(mCurrentDistrictName);
			qu=qu_list.get(newValue);
			
//			Toast.makeText(this, "省：" sheng.getZipcode() "--市：" shi.getZipcode() "--qu:" qu.getZipcode(), 1).show();
		
			
			
		}
	}

	protected void initProvinceDatas(){
		
    	AssetManager asset = getAssets();
        try {
            InputStream input = asset.open("province_data.xml");
            // 创建一个解析xml的工厂对象
			SAXParserFactory spf = SAXParserFactory.newInstance();
			// 解析xml
			SAXParser parser = spf.newSAXParser();
			XmlParserHandler handler = new XmlParserHandler();
			parser.parse(input, handler);
			input.close();
			// 获取解析出来的数据
			provinceList = handler.getDataList();
			//*/ 初始化默认选中的省、市、区
			if (provinceList!= null && !provinceList.isEmpty()) {
				mCurrentProviceName = provinceList.get(0).getName();
				List<CityModel> cityList = provinceList.get(0).getCityList();
				if (cityList!= null && !cityList.isEmpty()) {
					mCurrentCityName = cityList.get(0).getName();
					List<DistrictModel> districtList = cityList.get(0).getDistrictList();
					mCurrentDistrictName = districtList.get(0).getName();
					mCurrentZipCode = districtList.get(0).getZipcode();
				}
			}
			//
			mProvinceDatas = new String[provinceList.size()];
        	for (int i=0; i< provinceList.size(); i  ) {
        		// 遍历所有省的数据
        		mProvinceDatas[i] = provinceList.get(i).getName();
        		List<CityModel> cityList = provinceList.get(i).getCityList();
        		String[] cityNames = new String[cityList.size()];
        		for (int j=0; j< cityList.size(); j  ) {
        			// 遍历省下面的所有市的数据
        			cityNames[j] = cityList.get(j).getName();
        			List<DistrictModel> districtList = cityList.get(j).getDistrictList();
        			String[] distrinctNameArray = new String[districtList.size()];
        			DistrictModel[] distrinctArray = new DistrictModel[districtList.size()];
        			for (int k=0; k<districtList.size(); k  ) {
        				// 遍历市下面所有区/县的数据
        				DistrictModel districtModel = new DistrictModel(districtList.get(k).getName(), districtList.get(k).getZipcode());
        				// 区/县对于的邮编，保存到mZipcodeDatasMap
        				mZipcodeDatasMap.put(districtList.get(k).getName(), districtList.get(k).getZipcode());
        				distrinctArray[k] = districtModel;
        				distrinctNameArray[k] = districtModel.getName();
        			}
        			// 市-区/县的数据，保存到mDistrictDatasMap
        			mDistrictDatasMap.put(cityNames[j], distrinctNameArray);
        		}
        		// 省-市的数据，保存到mCitisDatasMap
        		mCitisDatasMap.put(provinceList.get(i).getName(), cityNames);
        	}
        	
        	 if(provinceList.size()>0){
        	    sheng=provinceList.get(0);
	        	}
	          if(sheng.getCityList().size()>0){	        	          	  
	        	  shi=	sheng.getCityList().get(0);
	        	  shi_list=sheng.getCityList();
	          }
	          
	          if(shi.getDistrictList().size()>0){
	        	  
	        	  qu=shi.getDistrictList().get(0);
	        	  qu_list=shi.getDistrictList();
	          }
        	
        } catch (Throwable e) {  
            e.printStackTrace();  
        } finally {
        	
           } 
        }

	@Override
	public void onClick(View arg0) {
		// TODO Auto-generated method stub


		switch (arg0.getId()) {
		case R.id.confirm_btn:
			show_tv.setText(mCurrentProviceName " " mCurrentCityName " " mCurrentDistrictName);
			
			break;
		case R.id.cancelBtn:
			break;
			
		default:
			break;
		}
	
		
		
	}

	
}