android 省市区三级联动

太过爱你忘了你带给我的痛 2022-09-21 05:43 335阅读 0赞

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：

![图片名称][20160616165630865]  
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。

[源码下载][Link 1]

[20160616165630865]: /images/20220721/71ea5529941b4af2b202b0aae6748330.png
[Link 1]: http://download.csdn.net/detail/forezp/9551637