我正在使用噴氣背包中的房間庫，我想將我的數組列表保存在房間數據庫中。我正在使用類型轉換器將數組列表轉換為字符串，但仍然收到錯誤。Error Message : Cannot figure out how to save this field into database. You can consider adding a type converter for it.這是我的類型轉換器。public class TypeConverterUtils {    @TypeConverter    public static String fromArray(ArrayList<CropData> arrayList) {        return GsonUtils.toGson(arrayList);    }}這是我的數據庫類。@TypeConverters({TypeConverterUtils.class})public abstract class CheruvuDatabase extends RoomDatabase {    private static final String DATABASE_NAME = "Cheruvu.db";    public abstract OtpDAO otpDAO();    public abstract FarmerInfoDAO farmerInfoDAO();    // For Singleton instantiation    private static final Object LOCK = new Object();    private static volatile CheruvuDatabase sInstance;    public static CheruvuDatabase getInstance(Context context) {        if (sInstance == null) {            synchronized (LOCK) {                if (sInstance == null) {                    context.getApplicationContext().deleteDatabase(CheruvuDatabase.DATABASE_NAME);                    sInstance = Room.databaseBuilder(context.getApplicationContext(), CheruvuDatabase.class, CheruvuDatabase.DATABASE_NAME)                            .fallbackToDestructiveMigration()                            .allowMainThreadQueries()                            .build();                }            }        }        return sInstance;    }}我想存儲這個數組列表。私有數組列表裁剪數據 = 新的數組列表<>（）;這是我的作物數據類。public class CropData {    private String cropName;    private Crop crop;    private Float cropAcres;    private Float cropYield;    private Float cropPrice;    public String getCropName() {        return cropName;    }    public void setCropName(String cropName) {        this.cropName = cropName;    }    public Crop getCrop() {        return crop;    }