Android 实现省份城市的选择，并获取城市编号

该程序主要使用 中央气象局 省份 城市数据库为基础 进行读取

城市数据库下载 http://download.csdn.net/download/xianqiang1/3896880 感谢该兄弟的分享

下载的数据库 db_weather.db 放到sdcard/weather 目录下面 方便后续操作

为了更好的了解数据库，使用 SQLite Database Browser 可以打开数据库 查看数据 和表等信息，如下

了解了表的构成可以实现操作了

androidManifest.xml

配置文件声明 添加操作sdcard 权限

 xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.cityselection"
 android:versionCode="1"
 android:versionName="1.0" >

 <uses-sdk android:minSdkVersion="8" />

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
 <application
 android:icon="@drawable/ic_launcher"
 android:label="@string/app_name" >
 <activity
 android:name=".City_SelectionActivity"
 android:label="@string/app_name" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />

 <category android:name="android.intent.category.LAUNCHER" />
 intent-filter>
 activity>
 application>

 manifest>

 xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.cityselection"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk android:minSdkVersion="8" />

     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <activity
             android:name=".City_SelectionActivity"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             intent-filter>
         activity>
     application>

 manifest>

布局文件main.xml

主要使用两个 spinner 分别实现城市 省份的选择

 xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" >

 <TextView
 android:text="省份/直辖市"
 android:textSize="20dp"
 android:textStyle="bold"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
 <Spinner
 android:id="@+id/provinces"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
 <TextView
 android:text="市/县"
 android:textSize="20dp"
 android:textStyle="bold"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
 <Spinner
 android:id="@+id/city"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />

 LinearLayout>

 xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical" >

     <TextView
         android:text="省份/直辖市"
         android:textSize="20dp"
         android:textStyle="bold"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
        />
     <Spinner
         android:id="@+id/provinces"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
        />
      <TextView
         android:text="市/县"
         android:textSize="20dp"
         android:textStyle="bold"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
        />
     <Spinner
         android:id="@+id/city"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         />

 LinearLayout>

主程序City_SelectionActivity.java

 package com.cityselection;

 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;

 import android.app.Activity;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;
 import android.widget.Toast;

 public class City_SelectionActivity extends Activity {
 /** Called when the activity is first created. */

 private File f = new File("/sdcard/weather/db_weather.db"); //数据库文件

 private Spinner province; //省份spinner
 private Spinner city; //城市spinner

 private List proset=new ArrayList();//省份集合
 private List citset=new ArrayList();//城市集合

 private int pro_id;
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);

 province=(Spinner)findViewById(R.id.provinces);
 ArrayAdapter pro_adapter=new ArrayAdapter(this, android.R.layout.simple_spinner_item,getProSet());
 province.setAdapter(pro_adapter);
 province.setOnItemSelectedListener(new SelectProvince());

 city=(Spinner)findViewById(R.id.city);
 city.setOnItemSelectedListener(new SelectCity());
 }

 //选择改变状态
 class SelectProvince implements OnItemSelectedListener{
 public void onItemSelected(AdapterView parent, View view,
 int position, long id) {
 // TODO Auto-generated method stub
 //获得省份ID
 pro_id=position;
 city.setAdapter(getAdapter());

 }
 public void onNothingSelected(AdapterView arg0) {
 // TODO Auto-generated method stub

 }
 }

 //城市 选择改变状态
 class SelectCity implements OnItemSelectedListener{
 public void onItemSelected(AdapterView parent, View view,
 int position, long id) {
 // TODO Auto-generated method stub
 String cityname=parent.getItemAtPosition(position).toString();
 //选择提示
 Toast.makeText(getApplicationContext(), cityname+" "+getCityNum(position), 2000).show();


 }
 public void onNothingSelected(AdapterView arg0) {
 // TODO Auto-generated method stub

 }
 }

 /**
 * 返回 省份集合
 */
 public List getProSet(){
 //打开数据库
 SQLiteDatabase db1 = SQLiteDatabase.openOrCreateDatabase(f, null);
 Cursor cursor=db1.query("provinces", null, null, null, null, null, null);
 while(cursor.moveToNext()){
 String pro=cursor.getString(cursor.getColumnIndexOrThrow("name"));
 proset.add(pro);
 }
 cursor.close();
 db1.close();
 return proset;
 }
 /**
 * 返回 城市集合
 */
 public List getCitSet(int pro_id){
 //清空城市集合
 citset.clear();
 //打开数据库
 SQLiteDatabase db1 = SQLiteDatabase.openOrCreateDatabase(f, null);
 Cursor cursor=db1.query("citys", null, "province_id="+pro_id, null, null, null, null);
 while(cursor.moveToNext()){
 String pro=cursor.getString(cursor.getColumnIndexOrThrow("name"));
 citset.add(pro);
 }
 cursor.close();
 db1.close();
 return citset;
 }
 /**
 * 返回适配器
 */
 public ArrayAdapter getAdapter(){
 ArrayAdapter adapter1=new ArrayAdapter(this, android.R.layout.simple_spinner_item,getCitSet(pro_id));
 return adapter1;
 }
 /**
 * 返回城市编号 以便调用天气预报api
 */
 public long getCityNum(int position){
 SQLiteDatabase db1 = SQLiteDatabase.openOrCreateDatabase(f, null);
 Cursor cursor=db1.query("citys", null, "province_id="+pro_id, null, null, null, null);
 cursor.moveToPosition(position);
 long citynum=Long.parseLong(cursor.getString(cursor.getColumnIndexOrThrow("city_num")));
 cursor.close();
 db1.close();
 return citynum;
 }

 }

 package com.cityselection;

 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;

 import android.app.Activity;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemSelectedListener;
 import android.widget.ArrayAdapter;
 import android.widget.Spinner;
 import android.widget.Toast;

 public class City_SelectionActivity extends Activity {
     /** Called when the activity is first created. */

     private File f = new File("/sdcard/weather/db_weather.db"); //数据库文件

     private Spinner province;  //省份spinner
     private Spinner city;      //城市spinner

     private List proset=new ArrayList();//省份集合
     private List citset=new ArrayList();//城市集合

     private int pro_id;
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         province=(Spinner)findViewById(R.id.provinces);
         ArrayAdapter pro_adapter=new ArrayAdapter(this, android.R.layout.simple_spinner_item,getProSet());
         province.setAdapter(pro_adapter);
         province.setOnItemSelectedListener(new SelectProvince());

         city=(Spinner)findViewById(R.id.city);
         city.setOnItemSelectedListener(new SelectCity());
     }

     //选择改变状态
     class SelectProvince implements OnItemSelectedListener{
         public void onItemSelected(AdapterView parent, View view,
                 int position, long id) {
             // TODO Auto-generated method stub
             //获得省份ID
             pro_id=position;
             city.setAdapter(getAdapter());

         }
         public void onNothingSelected(AdapterView arg0) {
             // TODO Auto-generated method stub

         }
     }

     //城市 选择改变状态
     class SelectCity implements OnItemSelectedListener{
         public void onItemSelected(AdapterView parent, View view,
                 int position, long id) {
             // TODO Auto-generated method stub
             String cityname=parent.getItemAtPosition(position).toString();
             //选择提示
             Toast.makeText(getApplicationContext(), cityname+" "+getCityNum(position), 2000).show();


         }
         public void onNothingSelected(AdapterView arg0) {
             // TODO Auto-generated method stub

         }
     }

     /**
      * 返回 省份集合
      */
     public List getProSet(){
        //打开数据库
         SQLiteDatabase db1 = SQLiteDatabase.openOrCreateDatabase(f, null);
         Cursor cursor=db1.query("provinces", null, null, null, null, null, null);
         while(cursor.moveToNext()){
             String pro=cursor.getString(cursor.getColumnIndexOrThrow("name"));
             proset.add(pro);
         }
         cursor.close();
         db1.close();
         return proset;
     }
     /**
      * 返回 城市集合
      */
     public List getCitSet(int pro_id){
         //清空城市集合
         citset.clear();
        //打开数据库
         SQLiteDatabase db1 = SQLiteDatabase.openOrCreateDatabase(f, null);
         Cursor cursor=db1.query("citys", null, "province_id="+pro_id, null, null, null, null);
         while(cursor.moveToNext()){
             String pro=cursor.getString(cursor.getColumnIndexOrThrow("name"));
             citset.add(pro);
         }
         cursor.close();
         db1.close();
         return citset;
     }
     /**
      * 返回适配器
      */
     public ArrayAdapter getAdapter(){
           ArrayAdapter adapter1=new ArrayAdapter(this, android.R.layout.simple_spinner_item,getCitSet(pro_id));
           return adapter1;
     }
      /**
       * 返回城市编号  以便调用天气预报api
       */
     public long getCityNum(int position){
         SQLiteDatabase db1 = SQLiteDatabase.openOrCreateDatabase(f, null);
         Cursor cursor=db1.query("citys", null, "province_id="+pro_id, null, null, null, null);
         cursor.moveToPosition(position);
         long citynum=Long.parseLong(cursor.getString(cursor.getColumnIndexOrThrow("city_num")));
         cursor.close();
         db1.close();
         return citynum;
     }

 }

实现结果：

代码下载 ：http://download.csdn.net/detail/forsta/4248931