android - e:[kapt]发生异常:java.lang.IllegalArgumentException:无法将int转换为Element

我正在尝试在Android应用程序中实现Room。我正在尝试从API获取数据并将其保存在本地数据库中。但是当我运行该应用程序时，发生了此错误

这是我的数据库类:

@Database(entities = [
    (User::class)],
        version = 1, exportSchema = false)
abstract class UserDatabase : RoomDatabase() {


    abstract fun userDao(): UserDao

    companion object {

        @Volatile
        private var INSTANCE: UserDatabase? = null

        fun getDatabase(context: Context): UserDatabase {

            if (INSTANCE == null){
                synchronized(this){
                    INSTANCE = Room.databaseBuilder(
                            context.applicationContext,
                            UserDatabase::class.java,
                            "user_database")
                            .build()
                }
            }
            return INSTANCE!!
        }
    }


}

这是我的存储库:

class Repository(application: Application) {


    private var mUserDao: UserDao

init {
        val db = UserDatabase.getDatabase(application)


    }
    @WorkerThread
    fun createUser(user: User) {
        mUserDao.createUser(user)
    }

    @WorkerThread
    fun deleteUser(id: Int) {
        mUserDao.deleteUser(id)
    }

    @WorkerThread
    fun getUser(id: Int) {
        mUserDao.getUser(id)
    }

这是我的用户

@Dao
interface UserDao{

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    fun createUser(user: User)

    @Delete
    fun deleteUser(int: Int)

    @Query("SELECT * FROM user WHERE user_id = :userID")
    fun getUser(userID: Int): LiveData<User>

}

我的LogginViewModel:

class LoginViewModel(application: Application) : AndroidViewModel(application) {

    var repository: Repository = Repository(application)


    fun createUser(user: User) = repository.createUser(user)

}

也发生此错误:

最佳答案

问题出在您的`@Delete

@Delete
fun deleteUser(int: Int)

应该是

@Delete
fun deleteUser(user: User)

@Delete方法的参数应该是一个实体或实体的数组，而不是Int

关于android - e:[kapt]发生异常:java.lang.IllegalArgumentException:无法将int转换为Element，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/54145123/