使用pull解析和spinner实现省市地区三级联动的效果

来源：互联网发布：网络维护基本知识编辑：程序博客网时间：2024/06/05 05:13

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一、xml资源文件

<?xml version="1.0" encoding="UTF-8"?>    <!--        START_DOCUMET:第一个节点 END_DOCUMET:尾节点 START_TAG:其他的首部的节点 p pn c cn...        END_TAG:其他的尾部的节点 </p> </c> ...    --><citylist>    <p p_id="01">        <pn>北京</pn>        <c c_id="0101">            <cn>北京</cn>            <d d_id="101010101">北京</d>            <d d_id="101010200">海淀</d>            <d d_id="101010300">朝阳</d>            <d d_id="101010400">顺义</d>            <d d_id="101010500">怀柔</d>            <d d_id="101010600">通州</d>            <d d_id="101010700">昌平</d>            <d d_id="101010800">延庆</d>            <d d_id="101010900">丰台</d>            <d d_id="101011000">石景山</d>            <d d_id="101011100">大兴</d>            <d d_id="101011200">房山</d>            <d d_id="101011300">密云</d>            <d d_id="101011400">门头沟</d>            <d d_id="101011500">平谷</d>        </c>    </p>

xml文件只选取了部分，完整文件包括中国的所有省市地区。

二、布局文件

<RelativeLayout 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: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=".MainActivity" >    <Spinner         android:id="@+id/spinner01"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        />    <Spinner         android:id="@+id/spinner02"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_toRightOf="@id/spinner01"        />    <Spinner         android:id="@+id/spinner03"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_toRightOf="@id/spinner02"        /></RelativeLayout>

三、城市类

package com.example.sjliandong;import java.util.ArrayList;import java.util.List;public class City {    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;    }}

四、地区类

package com.example.sjliandong;public class District {    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;    }}

五、省类

package com.example.sjliandong;import java.util.*;public class Provence {    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;    }}

六、Activity类

package com.example.sjliandong;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import org.xmlpull.v1.XmlPullParserFactory;import android.os.Bundle;import android.app.Activity;import android.content.res.Resources;import android.view.Menu;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;public class MainActivity extends Activity {    private List<Provence> provences;    private Provence provence;    ArrayAdapter<Provence> adapter01;    ArrayAdapter<City> adapter02;    ArrayAdapter<District> adapter03;    private Spinner spinner01, spinner02, spinner03;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        spinner01 = (Spinner) findViewById(R.id.spinner01);        spinner02 = (Spinner) findViewById(R.id.spinner02);        spinner03 = (Spinner) findViewById(R.id.spinner03);        try {            provences = getProvinces();        } catch (XmlPullParserException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        adapter01 = new ArrayAdapter<Provence>(this,                android.R.layout.simple_list_item_1, provences);        spinner01.setAdapter(adapter01);        spinner01.setSelection(0, true);        adapter02 = new ArrayAdapter<City>(this,                android.R.layout.simple_list_item_1, provences.get(0)                        .getCitys());        spinner02.setAdapter(adapter02);        spinner02.setSelection(0, true);        adapter03 = new ArrayAdapter<District>(this,                android.R.layout.simple_list_item_1, provences.get(0)                        .getCitys().get(0).getDistricts());        spinner03.setAdapter(adapter03);        spinner03.setSelection(0, true);        spinner01.setOnItemSelectedListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view,                    int position, long id) {                provence = provences.get(position);                adapter02 = new ArrayAdapter<City>(MainActivity.this,                        android.R.layout.simple_list_item_1, provences.get(                                position).getCitys());                spinner02.setAdapter(adapter02);            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });        spinner02.setOnItemSelectedListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view,                    int position, long id) {                adapter03 = new ArrayAdapter<District>(MainActivity.this,                        android.R.layout.simple_list_item_1, provence.getCitys().get(position)                        .getDistricts());                spinner03.setAdapter(adapter03);            }            @Override            public void onNothingSelected(AdapterView<?> parent) {                // TODO Auto-generated method stub            }        });    }    public List<Provence> getProvinces() throws XmlPullParserException,            IOException {        List<Provence> provinces = null;        Provence province = null;        List<City> citys = null;        City city = null;        List<District> districts = null;        District district = null;        Resources resources = getResources();        InputStream in = resources.openRawResource(R.raw.citys_weather);        XmlPullParserFactory factory = XmlPullParserFactory.newInstance();        XmlPullParser parser = factory.newPullParser();        parser.setInput(in, "utf-8");        int event = parser.getEventType();        while (event != XmlPullParser.END_DOCUMENT) {            switch (event) {            case XmlPullParser.START_DOCUMENT:                provinces = new ArrayList<Provence>();                break;            case XmlPullParser.START_TAG:                String tagName = parser.getName();                if ("p".equals(tagName)) {                    province = new Provence();                    citys = new ArrayList<City>();                    int count = parser.getAttributeCount();                    for (int i = 0; i < count; i++) {                        String attrName = parser.getAttributeName(i);                        String attrValue = parser.getAttributeValue(i);                        if ("p_id".equals(attrName))                            province.setId(attrValue);                    }                }                if ("pn".equals(tagName)) {                    province.setName(parser.nextText());                }                if ("c".equals(tagName)) {                    city = new City();                    districts = new ArrayList<District>();                    int count = parser.getAttributeCount();                    for (int i = 0; i < count; i++) {                        String attrName = parser.getAttributeName(i);                        String attrValue = parser.getAttributeValue(i);                        if ("c_id".equals(attrName))                            city.setId(attrValue);                    }                }                if ("cn".equals(tagName)) {                    city.setName(parser.nextText());                }                if ("d".equals(tagName)) {                    district = new District();                    int count = parser.getAttributeCount();                    for (int i = 0; i < count; i++) {                        String attrName = parser.getAttributeName(i);                        String attrValue = parser.getAttributeValue(i);                        if ("d_id".equals(attrName))                            district.setId(attrValue);                    }                    district.setName(parser.nextText());                    districts.add(district);                }                break;            case XmlPullParser.END_TAG:                if ("c".equals(parser.getName())) {                    city.setDistricts(districts);                    citys.add(city);                }                if ("p".equals(parser.getName())) {                    province.setCitys(citys);                    provinces.add(province);                }                break;            }            event = parser.next();        }        return provinces;    }}

七、效果：

这里写图片描述

完整项目下载地址：github spinner小练习

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