Kotlin：如何使用 Kotlin Room 生成唯一 id

Question

in my application,apart from the primarykey of a user,I will still need to generate a unique ID(12 -15 charactors) for showing to the public.

I am new with Room,Could you please take a look my code?

Thank you so much in advance !

@Entity
data class UserInfo(
    @PrimaryKey(autoGenerate = true)
    val userId:Int = 0,
    val image: String,
    val imageSource : String,//Local or Online
    val username : String,
    val gender :String,
    val userPublicId:String, //this is the id that need to generate 12-15 
    val birthday : String,
    val userIntro :String,
   
)

Answer 1

As mentioned @Tenfour04 you can use some ways to generate random string. I think org.apache.commons.lang3.RandomStringUtils is a good choice. For exmaple look at the following methods: randomAscii , randomAlphabetic , randomAlphanumeric .