Android之省市县三级联动
16lz
2021-12-04
layout布局
<?xml version="1.0" encoding="utf-8"?> 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 更多相关文章
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