安卓使用spinner控件和pull解析实现全国省市县的三级联动

import java.util.*;

public class Province {//省份内
    private String id;
    private String name;
    private List<City> citys;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    public List<City> getCitys() {
        return citys;
    }
    public void setCitys(List<City> citys) {
        this.citys = citys;
    }
    @Override
    public String toString() {
        return name;
    }


}

/**
 * Created by hjw on 2016/5/14.
 */
public class District {//地区类
    private String id;
    private String name;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return name;
    }


}

package com.example.hjw.androidday043;

/**
 * Created by hjw on 2016/5/14.
 */
import java.util.ArrayList;
import java.util.List;

public class City {//城市类
    private String id;
    private String name;
    private List<District> districts;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }


    public List<District> getDistricts() {
        return districts;
    }
    public void setDistricts(List<District> districts) {
        this.districts = districts;
    }
    @Override
    public String toString() {
        return name;
    }


}

package com.example.hjw.androidday043;
import android.content.res.XmlResourceParser;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private Spinner spinner1,spinner2,spinner3;
    private  Province province = null;
    private List<Province> list = new ArrayList<Province>();
    ArrayAdapter<Province> arrayAdapter1;
    ArrayAdapter<City> arrayAdapter2;
    ArrayAdapter<District>arrayAdapter3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner3 = (Spinner)findViewById(R.id.s3);
        spinner2 = (Spinner)findViewById(R.id.s2);
        spinner1 = (Spinner)findViewById(R.id.s1);
        list= parser();
        arrayAdapter1 = new ArrayAdapter<Province>(MainActivity.this,R.layout.support_simple_spinner_dropdown_item,list);
        arrayAdapter2 = new ArrayAdapter<City>(MainActivity.this,R.layout.support_simple_spinner_dropdown_item,list.get(0).getCitys());
        arrayAdapter3 = new ArrayAdapter<District>(MainActivity.this,R.layout.support_simple_spinner_dropdown_item,list.get(0).getCitys().get(0).getDistricts());
        spinner1.setAdapter(arrayAdapter1);
        spinner1.setSelection(0, true);
        spinner2.setAdapter(arrayAdapter2);
        spinner2.setSelection(0, true);
        spinner3.setAdapter(arrayAdapter3);
        spinner3.setSelection(0, true);
        spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                province = list.get(position);
                arrayAdapter2 = new ArrayAdapter<City>(MainActivity.this, R.layout.support_simple_spinner_dropdown_item, list.get(position).getCitys());
                spinner2.setAdapter(arrayAdapter2);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
        spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                arrayAdapter3 = new ArrayAdapter<District>(MainActivity.this,R.layout.support_simple_spinner_dropdown_item,province.getCitys().get(position).getDistricts());
                spinner3.setAdapter(arrayAdapter3);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
    }
    public List<Province> parser(){
        List<Province>list =null;
        Province province = null;

        List<City>cities = null;
        City city = null;

        List<District>districts = null;
        District district = null;

        // 创建解析器，并制定解析的xml文件
        XmlResourceParser parser = getResources().getXml(R.xml.cities);
        try{
        int type = parser.getEventType();
            while(type!=1) {
                String tag = parser.getName();//获得标签名
                switch (type) {
                    case XmlResourceParser.START_DOCUMENT:
                     list = new ArrayList<Province>();
                        break;
                    case XmlResourceParser.START_TAG:
                        if ("p".equals(tag)) {
                            province=new Province();
                            cities = new ArrayList<City>();
                            int n =parser.getAttributeCount();
                            for(int i=0 ;i<n;i++){
                                //获得属性的名和值
                                String name = parser.getAttributeName(i);
                                String value = parser.getAttributeValue(i);
                                if("p_id".equals(name)){
                                   province.setId(value);
                                }
                            }
                        }
                        if ("pn".equals(tag)){//省名字
                            province.setName(parser.nextText());
                        }
                        if ("c".equals(tag)){//城市
                            city = new City();
                            districts = new ArrayList<District>();
                            int n =parser.getAttributeCount();
                            for(int i=0 ;i<n;i++){
                                String name = parser.getAttributeName(i);
                                String value = parser.getAttributeValue(i);
                                if("c_id".equals(name)){
                                   city.setId(value);
                                }
                            }
                        }
                        if ("cn".equals(tag)){
                           city.setName(parser.nextText());
                        }
                        if ("d".equals(tag)){
                            district = new District();
                            int n =parser.getAttributeCount();
                            for(int i=0 ;i<n;i++){
                                String name = parser.getAttributeName(i);
                                String value = parser.getAttributeValue(i);
                                if("d_id".equals(name)){
                                   district.setId(value);
                                }
                            }
                            district.setName(parser.nextText());
                            districts.add(district);
                        }
                        break;
                    case XmlResourceParser.END_TAG:
                        if ("c".equals(tag)){
                            city.setDistricts(districts);
                            cities.add(city);
                        }
                        if("p".equals(tag)){
                            province.setCitys(cities);
                            list.add(province);
                        }
                        break;
                    default:
                        break;
                }
                type = parser.next();
            }
        }catch (XmlPullParserException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        /*catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } */
        catch (NumberFormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();

        }catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return list;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
    android:background="#ffffff"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.hjw.androidday043.MainActivity">
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="match_parent">
        <Spinner
            android:id="@+id/s1"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:spinnerMode="dropdown">
        </Spinner>
        <Spinner
            android:id="@+id/s2"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:spinnerMode="dropdown"></Spinner>
        <Spinner
            android:id="@+id/s3"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:spinnerMode="dropdown"></Spinner>
    </LinearLayout>



</LinearLayout>