package com.app.coolweather.db;

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

/**
 * Created by ydc on 2016/6/20.
 */
public class CoolWeatherOpenHelper extends SQLiteOpenHelper{
    /**
     *  Province表建表语句
     */
    public static final String CREATE_PROVINCE = "create table Province ("
            + "id integer primary key autoincrement, "
            + "province_name text, "
            + "province_code text)";
    /**
     *  City表建表语句
     */
    public static final String CREATE_CITY = "create table City ("
            + "id integer primary key autoincrement, "
            + "city_name text, "
            + "city_code text, "
            + "province_id integer)";
    /**
     *  County表建表语句
     */
    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);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_PROVINCE);  // 创建Province表
        db.execSQL(CREATE_CITY);  // 创建City表
        db.execSQL(CREATE_COUNTY);  // 创建County表
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    }
}
