error: Cannot figure out how to save this field into database

Question

I need to type converter for calendar type to add room database.

error:

Cannot figure out how to save this field into database. You can consider adding a type converter for it.

Answer 1

While using Room DB for complex data you should write custom type converters. Please find an example for a Date converter (This will convert date to a Long value and back):

public class DateTypeConverter {

    @TypeConverter
    public static Date toDate(Long value) {
        return value == null ? null : new Date(value);
    }

    @TypeConverter
    public static Long toLong(Date value) {
        return value == null ? null : value.getTime();
    }
}

Also, you can refer to this answer.