package com.coolweather.app.db;

import android.content.Context;
import android.database.DatabaseErrorHandler;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class CoolWeatherOpenHelper extends SQLiteOpenHelper{

	/**
	 * province
	 */
	public static final String CREATE_PROVINCE=
			"create table Province(" 
	+"id integer primary key autoincrement,"
	+"province_name text,"
	+"province_code text)";
	
	/**
	 * city
	 */
	public static final String CREATE_CITY="create table City(" +
			"id integer primary key autoincrement," +
			"city_name text," +
			"city_code," +
			"province_id integer)";
	/**
	 * county䣨أ
	 */
	public static final String CREATE_COUNTY="create table County(" +
			"id integer primary key autoincrement," +
			"county_name text," +
			"county_code text," +
			"city_id)";
	
	
	public CoolWeatherOpenHelper(Context context, String name,
			CursorFactory factory, int version) {
		super(context, name, factory, version);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// TODO Auto-generated method stub
		db.execSQL(CREATE_PROVINCE);
		db.execSQL(CREATE_CITY);
		db.execSQL(CREATE_COUNTY);//
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// TODO Auto-generated method stub
		
	}

}

package com.coolweather.app.db;

import android.content.Context;
import android.database.DatabaseErrorHandler;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class CoolWeatherOpenHelper extends SQLiteOpenHelper{

	/**
	 * province
	 */
	public static final String CREATE_PROVINCE=
			"create table Province(" 
	+"id integer primary key autoincrement,"
	+"province_name text,"
	+"province_code text)";
	
	/**
	 * city
	 */
	public static final String CREATE_CITY="create table City(" +
			"id integer primary key autoincrement," +
			"city_name text," +
			"city_code," +
			"province_id integer)";
	/**
	 * county䣨أ
	 */
	public static final String CREATE_COUNTY="create table County(" +
			"id integer primary key autoincrement," +
			"county_name text," +
			"county_code text," +
			"city_id integer)";
	
	
	public CoolWeatherOpenHelper(Context context, String name,
			CursorFactory factory, int version) {
		super(context, name, factory, version);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// TODO Auto-generated method stub
		db.execSQL(CREATE_PROVINCE);
		db.execSQL(CREATE_CITY);
		db.execSQL(CREATE_COUNTY);//
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// TODO Auto-generated method stub
		
	}

}

修改db OpenHelper 县建表语句