/*************************************************************************/

public class CoolWeatherOpenHelper extends SQLiteOpenHelper {

/*
    * Province省份
    *
    * */
public static final  String CREATE_PROVINCE = "create table Province(id integer primary key autoincrement,province_name text,province_code text)";

/*
    * City城市
    *
    * */
public static  final  String CREATE_CITY = "create table City(id integer primary key autoincrement,city_name text,city_code text,province_code text)";


/*
    * Country縣
    *
    * */

public  static final  String CREATE_COUNTRY = "create table Country(id integer primary key autoincrement,country_name text,country_code text,city_code text)";


         public CoolWeatherOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
            super(context, name, factory, version);
         }

        @Override
        public void onCreate(SQLiteDatabase db) {
            db.execSQL(CREATE_PROVINCE);
            db.execSQL(CREATE_CITY);
            db.execSQL(CREATE_COUNTRY);
        }

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

        }
}

CoolWeatherOpenHelper  dbHelper = new CoolWeatherOpenHelper(this, "cool_weather", null, 1);
SQLiteDatabase db = dbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
// 開始組裝第一條資料
values.put("province_name", "山東");
values.put("province_code", "07");
db.insert("Province", null, values); // 插入第一條資料
values.clear();
// 開始組裝第二條資料
values.put("province_name", "山西");
values.put("province_code", "09");
db.insert("Province", null, values); // 插入第二條資料

SQLiteDatabase db = dbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("province_name", "湖北");
db.update("Province", values, "province_code = ?", new String[] {"09"});

SQLiteDatabase db = dbHelper.getWritableDatabase();
db.delete("Province", "province_code = ?", new String[] {"09"});

SQLiteDatabasedb = dbHelper.getWritableDatabase();
Cursor cursor = db.query("Province", null, null, null, null, null, null);
if (cursor.moveToFirst()) {
do {
        String priovice_name = cursor.getString(cursor.getColumnIndex("province_name"));
        String province_code = cursor.getString(cursor.getColumnIndex("provice_code"));
        Log.d("MainActivity", "province name is " + priovice_name);
        Log.d("MainActivity", "province code is " + province_code);
    } while (cursor.moveToNext());
}
cursor.close();

SQLiteDatabase db = dbHelper.getWritableDatabase();
db.beginTransaction(); // 開啟事務
try {
    ..............................................................
    ..............................................................
    ..............................................................
db.setTransactionSuccessful(); // 事務已經執行成功
} catch (Exception e) {
   e.printStackTrace();
} finally {
   db.endTransaction(); // 結束事務
}