最近项目，需要用到三级联动，在网上找了一些例子，进行了修改，实现，提炼出来了给大家分享
实现思路是在三个wheelview 进行联动。选择了省，马上就关联到市和区，选择了市 ，马上就可以关联到区。效果图：
public class ProvinceInfoModel { private String name; private List cityList; public ProvinceInfoModel() { super(); } public ProvinceInfoModel(String name, List cityList) { super(); this.name = name; this.cityList = cityList; } public String getName() { return name; } public void setName(String name) { this.name = name; } public List getCityList() { return cityList; } public void setCityList(List cityList) { this.cityList = cityList; } @Override public String toString() { return "ProvinceInfoModel [name=" + name + ", cityList=" + cityList + "]"; }} 存市和其对应的区list
public class CityInfoModel { private String name; private List districtList; public CityInfoModel() { super(); } public CityInfoModel(String name, List districtList) { super(); this.name = name; this.districtList = districtList; } public String getName() { return name; } public void setName(String name) { this.name = name; } public List getDistrictList() { return districtList; } public void setDistrictList(List districtList) { this.districtList = districtList; } @Override public String toString() { return "CityInfoModel [name=" + name + ", districtList=" + districtList + "]"; }} 区的modeL
public class DistrictInfoModel { private String name; private String zipcode; public DistrictInfoModel() { super(); } public DistrictInfoModel(String name, String zipcode) { super(); this.name = name; this.zipcode = zipcode; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getZipcode() { return zipcode; } public void setZipcode(String zipcode) { this.zipcode = zipcode; } @Override public String toString() { return "DistrictInfoModel [name=" + name + ", zipcode=" + zipcode + "]"; }} 数据存储在xml中，在assets目录下，详情见源代码，代码太多了。
用的sax解析xml并得到数据存储在内存中
public class AddrXmlParser extends DefaultHandler { private List provinceList = new ArrayList (); public java.util.List getDataList() { return provinceList; } @Override public void startDocument() throws SAXException { } ProvinceInfoModel provinceModel = new ProvinceInfoModel(); CityInfoModel cityModel = new CityInfoModel(); DistrictInfoModel districtModel = new DistrictInfoModel(); @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if (qName.equals("province")) { provinceModel = new ProvinceInfoModel(); provinceModel.setName(attributes.getValue(0)); provinceModel.setCityList(new ArrayList ()); } else if (qName.equals("city")) { cityModel = new CityInfoModel(); cityModel.setName(attributes.getValue(0)); cityModel.setDistrictList(new ArrayList ()); } else if (qName.equals("district")) { districtModel = new DistrictInfoModel(); districtModel.setName(attributes.getValue(0)); districtModel.setZipcode(attributes.getValue(1)); } } @Override public void endElement(String uri, String localName, String qName) throws SAXException { if (qName.equals("district")) { cityModel.getDistrictList().add(districtModel); } else if (qName.equals("city")) { provinceModel.getCityList().add(cityModel); } else if (qName.equals("province")) { provinceList.add(provinceModel); } } @Override public void characters(char[] ch, int start, int length) throws SAXException { }} 需要在activity 中开启线程读取数据
protected boolean readAddrDatas() { List provinceList = null; AssetManager asset = getAssets(); try { InputStream input = asset.open("province_data.xml"); SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser parser = spf.newSAXParser(); AddrXmlParser handler = new AddrXmlParser(); parser.parse(input, handler); input.close(); provinceList = handler.getDataList(); if (provinceList != null && !provinceList.isEmpty()) { mCurrentProviceName = provinceList.get(0).getName(); List cityList = provinceList.get(0).getCityList(); if (cityList != null && !cityList.isEmpty()) { mCurrentCityName = cityList.get(0).getName(); List districtList = cityList.get(0).getDistrictList(); mCurrentDistrictName = districtList.get(0).getName(); } } mProvinceDatas = new ArrayList (); for (int i = 0; i < provinceList.size(); i++) { mProvinceDatas.add(provinceList.get(i).getName()); List cityList = provinceList.get(i).getCityList(); ArrayList cityNames = new ArrayList (); for (int j = 0; j < cityList.size(); j++) { cityNames.add(cityList.get(j).getName()); List districtList = cityList.get(j).getDistrictList(); ArrayList distrinctNameArray = new ArrayList (); DistrictInfoModel[] distrinctArray = new DistrictInfoModel[districtList.size()]; for (int k = 0; k < districtList.size(); k++) { DistrictInfoModel districtModel = new DistrictInfoModel(districtList.get(k).getName(), districtList.get(k).getZipcode()); distrinctArray[k] = districtModel; distrinctNameArray.add(districtModel.getName()); } mDistrictDatasMap.put(cityNames.get(j), distrinctNameArray); } mCitisDatasMap.put(provinceList.get(i).getName(), cityNames); } return true; } catch (Throwable e) { e.printStackTrace(); return false; } } 读取完数据需要设置weelview 的数据
mProvincePicker.setOnSelectListener(new WheelView.OnSelectListener() { @Override public void endSelect(int id, String text) { String provinceText = mProvinceDatas.get(id); if (!mCurrentProviceName.equals(provinceText)) { mCurrentProviceName = provinceText; ArrayList mCityData = mCitisDatasMap.get(mCurrentProviceName); mCityPicker.resetData(mCityData); mCityPicker.setDefault(0); mCurrentCityName = mCityData.get(0); ArrayList mDistrictData = mDistrictDatasMap.get(mCurrentCityName); mCountyPicker.resetData(mDistrictData); mCountyPicker.setDefault(0); mCurrentDistrictName = mDistrictData.get(0); } } @Override public void selecting(int id, String text) { } }); 代码不一一写成，详情见源码。