private static final String DB_NAME = "school.db";//数据库的名
public static final int DB_VERSION = 1;//数据库版本号
public MySQLite(Context context) {
    super(context, DB_NAME, null, DB_VERSION);
}

@Override
public void onCreate(SQLiteDatabase database, ConnectionSource connectionSource) {
    //创建表
    try {
        TableUtils.createTableIfNotExists(connectionSource, Classes.class);
    } catch (SQLException e) {
        e.printStackTrace();
    }
}

@Override
public void onUpgrade(SQLiteDatabase database, ConnectionSource connectionSource, int oldVersion, int newVersion) {
    //升级调用
}