我在代码中有一些字符串常量。我可以将所有这些都放入资源中吗strings.xml？我认为单独使用列名的可能性仍然存在。有必要在以后对数据库的请求中搜索帖子索引。不使用索引，数字会令人困惑、不舒服。private static final String NAME_DB = "cars.db";private static final String TABLE_NAME = "cars";private static final String COL_BRAND = "brand";private static final String COL_MODEL = "model";private static final String COL_COLOR = "color";private static final String COL_MAX_SPEED = "max_speed";private static final String COL_ENGINE_POWER = "engine_power";private static final String CREATE_TABLE =        "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + " (" +                "id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," +                COL_BRAND + " TEXT NOT NULL, " +                COL_MODEL + " TEXT NOT NULL, " +                COL_COLOR + " TEXT, " +                COL_MAX_SPEED + " INTEGER," +                COL_ENGINE_POWER + " INTEGER)";private static final String INSERT_DEFAULT_VALUES =        "INSERT INTO " + TABLE_NAME + "(brand, model, color, max_speed, engine_power) VALUES" +                "('Audi', 'Q7 II', 'White', 233, 252)," +                "('Acura', 'ZDX', 'Black', 241, 300)," +                "('BMW', 'X1 I', 'Blue', 205, 204)," +                "('Hyundai', 'Solaris', 'Red', 100, 100)," +                "('Hyundai', 'Tucson', 'Gray', 150, 177)," +                "('BMW', '8 G14', 'Black', 250, 320)";private static final String SELECT_ALL = "SELECT * FROM " + TABLE_NAME;private static final String SELECT_TOP_1 = "SELECT * FROM " + TABLE_NAME + " LIMIT 1";示例代码DatabaseAdapter(Context context) {    db = context.openOrCreateDatabase(NAME_DB, MODE_PRIVATE, null);    db.execSQL(CREATE_TABLE);    Cursor cursor = db.rawQuery(SELECT_TOP_1, null);    if (!cursor.moveToFirst()) {        db.execSQL(INSERT_DEFAULT_VALUES);    }}String[] selectAll() {    Cursor cursor = db.rawQuery(SELECT_ALL, null);    if (!cursor.moveToFirst()) {        return null;    }