android - 在 kotlin android 中显示 Unresolved 引用

Question

我正在使用 room persistence library 和 dagger

RoomModule.kt

@Module
class RoomModule {

    @Provides
    @Singleton
    internal fun provideMoviesAppDatabase(application: Application): MoviesAppDatabase {
        return Room.databaseBuilder<MoviesAppDatabase>(application, KtMoviesAppDatabase::class.java, Keys.DATABASE_NAME)
                .addCallback(object : RoomDatabase.Callback() {
                    override fun onCreate(db: SupportSQLiteDatabase) {}
                    override fun onOpen(db: SupportSQLiteDatabase) {}
                })
                .build()
    }

}

KtMoviesAppDatabase.kt

@Database(entities = [Movie::class], version = 1)
abstract class KtMoviesAppDatabase : RoomDatabase() {
    abstract fun getMovieDAO(): MovieDAO
}

我得到的错误:

---

{编辑}

我做了一些改变

@Module
class RoomModule {

    @Provides
    @Singleton
    internal fun provideMoviesAppDatabase(application: Application): KtMoviesAppDatabase {
        return Room.databaseBuilder<KtMoviesAppDatabase>(application, KtMoviesAppDatabase::class.java, Keys.DATABASE_NAME)
                .addCallback(object : RoomDatabase.Callback() {
                    override fun onCreate(db: SupportSQLiteDatabase) {}
                    override fun onOpen(db: SupportSQLiteDatabase) {}
                })
                .build()
    }

}

我仍然有错误:

Unresolved reference: java

Answer 1

非常愚蠢的错误，因为我没有添加适当的依赖项

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.core:core-ktx:1.0.2'