android-wheel控件实现三级联动效果

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:tools="http://schemas.android.com/tools"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:background="#E9E9E9"   android:orientation="vertical" >    <LinearLayout     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:orientation="horizontal" >      <kankan.wheel.widget.WheelView       android:id="@+id/id_province"       android:layout_width="0dp"       android:layout_height="wrap_content"       android:layout_weight="1" >     </kankan.wheel.widget.WheelView>      <kankan.wheel.widget.WheelView       android:id="@+id/id_city"       android:layout_width="0dp"       android:layout_height="wrap_content"       android:layout_weight="1" >     </kankan.wheel.widget.WheelView>      <kankan.wheel.widget.WheelView       android:id="@+id/id_district"       android:layout_width="0dp"       android:layout_height="wrap_content"       android:layout_weight="1" >     </kankan.wheel.widget.WheelView>   </LinearLayout>    <Button     android:id="@+id/btn_confirm"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_marginTop="10dip"     android:gravity="center"     android:text="确定"     android:textColor="#000000" />  </LinearLayout> 

<root>  <province name="安徽省">   <city name="安庆市">    <district name="枞阳县" zipcode="246000" />    <district name="大观区" zipcode="246000" />    <district name="怀宁县" zipcode="246000" />    <district name="潜山县" zipcode="246000" />    <district name="宿松县" zipcode="246000" />    <district name="太湖县" zipcode="246000" />    <district name="桐城市" zipcode="246000" />    <district name="望江县" zipcode="246000" />    <district name="宜秀区" zipcode="246000" />    <district name="迎江区" zipcode="246000" />    <district name="岳西县" zipcode="246000" />    <district name="其他" zipcode="246000" />   </city> 

package com.mrwujay.cascade.model;  import java.util.List;  public class ProvinceModel {   private String name;   private List<CityModel> cityList;      public ProvinceModel() {     super();   }    public ProvinceModel(String name, List<CityModel> cityList) {     super();     this.name = name;     this.cityList = cityList;   }    public String getName() {     return name;   }    public void setName(String name) {     this.name = name;   }    public List<CityModel> getCityList() {     return cityList;   }    public void setCityList(List<CityModel> cityList) {     this.cityList = cityList;   }    @Override   public String toString() {     return "ProvinceModel [name=" + name + ", cityList=" + cityList + "]";   }    } 

package com.mrwujay.cascade.model;  import java.util.List;  public class CityModel {   private String name;   private List<DistrictModel> districtList;      public CityModel() {     super();   }    public CityModel(String name, List<DistrictModel> districtList) {     super();     this.name = name;     this.districtList = districtList;   }    public String getName() {     return name;   }    public void setName(String name) {     this.name = name;   }    public List<DistrictModel> getDistrictList() {     return districtList;   }    public void setDistrictList(List<DistrictModel> districtList) {     this.districtList = districtList;   }    @Override   public String toString() {     return "CityModel [name=" + name + ", districtList=" + districtList         + "]";   }    } 

package com.mrwujay.cascade.model;  public class DistrictModel {   private String name;   private String zipcode;      public DistrictModel() {     super();   }    public DistrictModel(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 "DistrictModel [name=" + name + ", zipcode=" + zipcode + "]";   }  } 

package com.mrwujay.cascade.service;  import java.util.ArrayList; import java.util.List; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler;  import com.mrwujay.cascade.model.CityModel; import com.mrwujay.cascade.model.DistrictModel; import com.mrwujay.cascade.model.ProvinceModel;  public class XmlParserHandler extends DefaultHandler {    /**    * 存储所有的解析对象    */   private List<ProvinceModel> provinceList = new ArrayList<ProvinceModel>();    public XmlParserHandler() {    }    /**    * 对外暴露的方法    */   public List<ProvinceModel> getDataList() {     return provinceList;   }    @Override   public void startDocument() throws SAXException {     // 当读到第一个开始标签的时候，会触发这个方法   }    ProvinceModel provinceModel = new ProvinceModel();   CityModel cityModel = new CityModel();   DistrictModel districtModel = new DistrictModel(); /**  *  <province name="安徽省">   <city name="安庆市">    <district name="枞阳县" zipcode="246000" />    <district name="大观区" zipcode="246000" />    <district name="怀宁县" zipcode="246000" />    <district name="潜山县" zipcode="246000" />    <district name="宿松县" zipcode="246000" />    <district name="太湖县" zipcode="246000" />    <district name="桐城市" zipcode="246000" />    <district name="望江县" zipcode="246000" />    <district name="宜秀区" zipcode="246000" />    <district name="迎江区" zipcode="246000" />    <district name="岳西县" zipcode="246000" />    <district name="其他" zipcode="246000" />   </city>  */   @Override   public void startElement(String uri, String localName, String qName,       Attributes attributes) throws SAXException {     // 当遇到开始标记的时候，调用这个方法     if (qName.equals("province")) {       provinceModel = new ProvinceModel();       provinceModel.setName(attributes.getValue(0));       provinceModel.setCityList(new ArrayList<CityModel>());     } else if (qName.equals("city")) {       cityModel = new CityModel();       cityModel.setName(attributes.getValue(0));       cityModel.setDistrictList(new ArrayList<DistrictModel>());     } else if (qName.equals("district")) {       districtModel = new DistrictModel();       districtModel.setName(attributes.getValue(0));       districtModel.setZipcode(attributes.getValue(1));     }   }    @Override   public void endElement(String uri, String localName, String qName)       throws SAXException {     // 遇到结束标记的时候，会调用这个方法     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 {   }  } 

package com.mrwujay.cascade.activity;  import java.io.InputStream; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import android.app.Activity; import android.content.res.AssetManager;  import com.mrwujay.cascade.model.CityModel; import com.mrwujay.cascade.model.DistrictModel; import com.mrwujay.cascade.model.ProvinceModel; import com.mrwujay.cascade.service.XmlParserHandler;  public class BaseActivity extends Activity {    /**    * 所有省    */   protected String[] mProvinceDatas;   /**    * key - 省 value - 市    */   protected Map<String, String[]> mCitisDatasMap = new HashMap<String, String[]>();   /**    * key - 市 values - 区    */   protected Map<String, String[]> mDistrictDatasMap = new HashMap<String, String[]>();    /**    * key - 区 values - 邮编    */   protected Map<String, String> mZipcodeDatasMap = new HashMap<String, String>();    /**    * 当前省的名称    */   protected String mCurrentProviceName;   /**    * 当前市的名称    */   protected String mCurrentCityName;   /**    * 当前区的名称    */   protected String mCurrentDistrictName = "";    /**    * 当前区的邮政编码    */   protected String mCurrentZipCode = "";    /**    * 解析省市区的XML数据    */    protected void initProvinceDatas() {     //省份集合列表     List<ProvinceModel> provinceList = null;     //获取资源     AssetManager asset = getAssets();     try {       //获取输入流       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();       //解析工具       XmlParserHandler handler = new XmlParserHandler();       //进行解析       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()) {         //获取第一个省份         mCurrentProviceName = provinceList.get(0).getName();         List<CityModel> cityList = provinceList.get(0).getCityList();         if (cityList != null && !cityList.isEmpty()) {           //获取第一个省份的第一个城市名           mCurrentCityName = cityList.get(0).getName();           List<DistrictModel> districtList = cityList.get(0)               .getDistrictList();           //获取第一个省份的第一个城市的第一个县名称           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);       }     } catch (Throwable e) {       e.printStackTrace();     } finally {      }   }  } 

package com.mrwujay.cascade.activity;  import com.mrwujay.cascade.R; import com.mrwujay.cascade.R.id; import com.mrwujay.cascade.R.layout;  import kankan.wheel.widget.OnWheelChangedListener; import kankan.wheel.widget.WheelView; import kankan.wheel.widget.adapters.ArrayWheelAdapter; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast;  public class MainActivity extends BaseActivity implements OnClickListener, OnWheelChangedListener {   private WheelView mViewProvince;   private WheelView mViewCity;   private WheelView mViewDistrict;   private Button mBtnConfirm;    @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     setUpViews();     setUpListener();     setUpData();   }      private void setUpViews() {     mViewProvince = (WheelView) findViewById(R.id.id_province);     mViewCity = (WheelView) findViewById(R.id.id_city);     mViewDistrict = (WheelView) findViewById(R.id.id_district);     mBtnConfirm = (Button) findViewById(R.id.btn_confirm);   }      private void setUpListener() {     // 添加change事件     mViewProvince.addChangingListener(this);     // 添加change事件     mViewCity.addChangingListener(this);     // 添加change事件     mViewDistrict.addChangingListener(this);     // 添加onclick事件     mBtnConfirm.setOnClickListener(this);   }      private void setUpData() {     initProvinceDatas();     mViewProvince.setViewAdapter(new ArrayWheelAdapter<String>(MainActivity.this, mProvinceDatas));     // 设置可见条目数量     mViewProvince.setVisibleItems(7);     mViewCity.setVisibleItems(7);     mViewDistrict.setVisibleItems(7);     updateCities();     updateAreas();   }    /**    * 根据当前的省，更新市WheelView的信息    */   private void updateCities() {     //获取当前的省份的itme索引值     int pCurrent = mViewProvince.getCurrentItem();     //湖区当前省份名字     mCurrentProviceName = mProvinceDatas[pCurrent];     //获取该省份下面的市数组集合     String[] cities = mCitisDatasMap.get(mCurrentProviceName);     if (cities == null) {       cities = new String[] { "" };     }     mViewCity.setViewAdapter(new ArrayWheelAdapter<String>(this, cities));     mViewCity.setCurrentItem(0);     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];     String[] areas = mDistrictDatasMap.get(mCurrentCityName);      if (areas == null) {       areas = new String[] { "" };     }     mViewDistrict.setViewAdapter(new ArrayWheelAdapter<String>(this, areas));     mViewDistrict.setCurrentItem(0);   }          /**    * 实现接口方法的回调    */   @Override   public void onChanged(WheelView wheel, int oldValue, int newValue) {     // TODO Auto-generated method stub     if (wheel == mViewProvince) {       updateCities();     } else if (wheel == mViewCity) {       updateAreas();     } else if (wheel == mViewDistrict) {       //获取县的名字       mCurrentDistrictName = mDistrictDatasMap.get(mCurrentCityName)[newValue];       //获取县的编码       mCurrentZipCode = mZipcodeDatasMap.get(mCurrentDistrictName);     }   }      @Override   public void onClick(View v) {     switch (v.getId()) {     case R.id.btn_confirm:       showSelectedResult();       break;     default:       break;     }   }    private void showSelectedResult() {     Toast.makeText(MainActivity.this, "当前选中:"+mCurrentProviceName+","+mCurrentCityName+","         +mCurrentDistrictName+","+mCurrentZipCode, Toast.LENGTH_SHORT).show();   } } 

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