UNIQUE constraint failed: sqlite database : android

Question

I am trying to insert values in table. But there is only one value inserted. I am getting an error in log cat when I am trying to insert new values.

Log cat shows :

Answer 1

If you use Room then instead of @PrimaryKey you should use @PrimaryKey(autoGenerate = true)

and make your id variable optional:

@Entity(tableName = "contact_table") data class Contact(@PrimaryKey(autoGenerate = true) @ColumnInfo(name = "id") var id: Long?, @ColumnInfo(name = "name") val name: String, @ColumnInfo(name = "phone") val phone: String)

and then when adding a new item, pass null as id, insert func will return new id, add it to your object

val contact = Contact(null, name, phone)
contact.id = ContactRoomDatabase.getDatabase().contactDao().insert(contact)