Android之省市县三级联动
layout布局
java代码：
package com.example.login;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.*;
import java.io.*;
import org.xmlpull.v1.XmlPullParserException;
import java.text.*;
import java.util.*;
public class LoginActivity extends AppCompatActivity {
private Spinner sp_province,sp_city,sp_county;
private ArrayAdapter provinceArrayAdapter;
private ArrayAdapter cityArrayAdapter;
private ArrayAdapter countyArrayAdapter;
private List provinces;
private int prov_position;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_main);
Intent intent=getIntent();
//得到容器视图
sp_city=(Spinner)findViewById(R.id.city);
sp_county=(Spinner)findViewById(R.id.county);
sp_province=(Spinner)findViewById(R.id.province);
//得到解析后的数据
InputStream is = getResources().openRawResource(R.raw.locations);
try { provinces= LocationService.getProvince(is);
}catch (XmlPullParserException |IOException e)
{ e.printStackTrace(); }
//设置省的适配器
provinceArrayAdapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item, provinces);
sp_province.setAdapter(provinceArrayAdapter);
sp_province.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView parent, View view, int position, long id) {
prov_position = position;
//设置市的适配器
cityArrayAdapter = new ArrayAdapter(LoginActivity.this, android.R.layout.simple_spinner_item, provinces.get(position).getCitys());
sp_city.setAdapter(cityArrayAdapter);
}
@Override
public void onNothingSelected(AdapterView parent) {
}
});
sp_city.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView parent, View view,
int position, long id)
{
//设置地区的适配器
countyArrayAdapter= new ArrayAdapter(LoginActivity.this, android.R.layout.simple_spinner_item, provinces.get(prov_position).getCitys().get(position).getCounties());
sp_county.setAdapter(countyArrayAdapter);
}
@Override
public void onNothingSelected(AdapterView parent)
{
}
});
}
}
city.java
package com.example.login;
import java.util.List;
public class City {
private String id;
private String name;
private List counties;
public City() {
super();
}
public City(String id, String name, List counties) {
super();
this.id = id;
this.name = name;
this.counties = counties;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public List getCounties() {
return counties;
}
public void setCounties(List counties) {
this.counties = counties;
}
public String toString() {
return name;
}
}
County .java
package com.example.login;
public class County {
private String id;
private String name;
public County() {
super();
}
public County(String id, String name) {
super();
this.id = id;
this.name=name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String toString() {
return name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
Province .java
package com.example.login;
import java.util.List;
public class Province {
private String id;
private String name;
private List citys;
public Province()
{
super();
}
public Province(String id,String name,List citys)
{
super();
this.name=name;
this.id=id;
this.citys=citys;
}
@Override
public String toString() {
return name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public List getCitys() {
return citys;
}
public void setCitys(List citys) {
this.citys = citys;
}
}
LocationService .java
package com.example.login;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
public class LocationService {
public static List getProvince(InputStream is) throws XmlPullParserException, IOException {
Listprovinces =null;
Province province=null;
List cities=null;
City city=null;
List counties=null;
County county=null;
String tagName=null;
//初始化解析器
XmlPullParserFactory factory=XmlPullParserFactory.newInstance();
XmlPullParser parser=factory.newPullParser();
parser.setInput(is,"utf-8");
int event = parser.getEventType();
while(event!=XmlPullParser.END_DOCUMENT)
{
switch (event)
{
case XmlPullParser.START_TAG:
tagName=parser.getName();
if ("citylist".equals(tagName))
{
provinces = new ArrayList();
}
else if("p".equals(tagName))
{
province=new Province();
cities = new ArrayList();
int count =parser.getAttributeCount();
for(int i=0;i();
int count =parser.getAttributeCount();
for(int i=0;i