重新打开应用程序时，房间无法验证数据完整性

Question

当我从Android Studio运行时是正常的

但当我关闭并重新打开应用程序时，我得到了错误

IllegalStateException：Room无法验证数据完整性。看起来您已经更改了架构，但忘记更新版本号。您可以通过增加版本号来解决这个问题。

@Database(entities = [Type::class], version = 3)
abstract class TypeRoomDb : RoomDatabase(){

    abstract fun typeDao() : TypeDao

    companion object{
        @Volatile
        private var INSTANCE : TypeRoomDb? = null

        fun getDataBase(
            context: Context,
            scope: CoroutineScope
        ): TypeRoomDb {
            return INSTANCE ?: synchronized(this){
                val instance = Room.databaseBuilder(
                    context.applicationContext,
                    TypeRoomDb::class.java,
                    Cons.DB_NAME
                )
                    .fallbackToDestructiveMigration()
                    .addCallback(TypeDbCallBack(scope))
                    .build()
                INSTANCE = instance

                instance
            }
        }

        private class TypeDbCallBack(
            private val scope: CoroutineScope
        ) : RoomDatabase.Callback(){
            override fun onOpen(db: SupportSQLiteDatabase) {
                super.onOpen(db)
                INSTANCE?.let { database ->
                    scope.launch(Dispatchers.IO) {
                        populateDb(
                            database.typeDao()
                        )
                    }
                }
            }
        }

        fun populateDb(typeDao: TypeDao){
            typeDao.deleteAll()
            /*out*/
            typeDao.insert(
                Type(
                    "000",
                    "Makan",
                    0
                )
            )
            typeDao.insert(
                Type(
                    "001",
                    "Transportasi",
                    0
                )
            )
            typeDao.insert(
                Type(
                    "002",
                    "Makanan Ringan",
                    0
                )
            )
            typeDao.insert(
                Type(
                    "003",
                    "Komunikasi",
                    0
                )
            )

            /*in*/
            typeDao.insert(Type(
                "500",
                "Gaji",
                1))
            typeDao.insert(
                Type(
                    "5001",
                    "Hadiah",
                    1
                )
            )
        }

    }
}

我的第二张桌子

@Database(entities = [LogKeuangan::class], version = 2)
abstract class LogKeuanganRoomDb : RoomDatabase() {
    abstract fun logKeuanganDao(): LogKeuanganDao

    companion object {
        @Volatile
        private var INSTANCE: LogKeuanganRoomDb? = null

        fun getDataBase(
            context: Context,
            scope: CoroutineScope
        ): LogKeuanganRoomDb {
            return INSTANCE ?: synchronized(this) {
                val instance = Room.databaseBuilder(
                    context.applicationContext,
                    LogKeuanganRoomDb::class.java,
                    Cons.DB_NAME
                )
                    .fallbackToDestructiveMigration()
                    .build()

                INSTANCE = instance
                instance
            }
        }

    }
}

Answer 1

中明确提到的一切

IllegalStateException：Room无法验证数据完整性。看起来您已经更改了架构，但忘记更新版本号。您可以通过增加版本号来解决这个问题。

只需增加版本并将exportschema设置为false

@Database(entities = [Type::class], version = 3)

@Database(entities = [Type::class], version = 4, exportSchema = false)