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：
首先建了三个Model 用于存数据
存省 和市的list 和区的
public class ProvinceInfoModel {
private String name;
private List<CityInfoModel> cityList;
public ProvinceInfoModel() {
super();
}
public ProvinceInfoModel(String name, List<CityInfoModel> cityList) {
super();
this.name = name;
this.cityList = cityList;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<CityInfoModel> getCityList() {
return cityList;
}
public void setCityList(List<CityInfoModel> 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<DistrictInfoModel> districtList;
public CityInfoModel() {
super();
}
public CityInfoModel(String name, List<DistrictInfoModel> districtList) {
super();
this.name = name;
this.districtList = districtList;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<DistrictInfoModel> getDistrictList() {
return districtList;
}
public void setDistrictList(List<DistrictInfoModel> 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<ProvinceInfoModel> provinceList = new ArrayList<ProvinceInfoModel>();
public java.util.List<ProvinceInfoModel> 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<CityInfoModel>());
} else if (qName.equals("city")) {
cityModel = new CityInfoModel();
cityModel.setName(attributes.getValue(0));
cityModel.setDistrictList(new ArrayList<DistrictInfoModel>());
} 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<ProvinceInfoModel> 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<CityInfoModel> cityList = provinceList.get(0).getCityList();
if (cityList != null && !cityList.isEmpty()) {
mCurrentCityName = cityList.get(0).getName();
List<DistrictInfoModel> districtList = cityList.get(0).getDistrictList();
mCurrentDistrictName = districtList.get(0).getName();
}
}
mProvinceDatas = new ArrayList<String>();
for (int i = 0; i < provinceList.size(); i++) {
mProvinceDatas.add(provinceList.get(i).getName());
List<CityInfoModel> cityList = provinceList.get(i).getCityList();
ArrayList<String> cityNames = new ArrayList<String>();
for (int j = 0; j < cityList.size(); j++) {
cityNames.add(cityList.get(j).getName());
List<DistrictInfoModel> districtList = cityList.get(j).getDistrictList();
ArrayList<String> distrinctNameArray = new ArrayList<String>();
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<String> mCityData = mCitisDatasMap.get(mCurrentProviceName);
mCityPicker.resetData(mCityData);
mCityPicker.setDefault(0);
mCurrentCityName = mCityData.get(0);
ArrayList<String> 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。