Why is my room database data non persistent?

Question

I have an android app that uses room database and dagger. I tried all the answers I found on the internet, and this is my last resort as I'm on the week 2 of solving this problem.

My Setup:

com.example.app
|-configurations
  |-AppComponent.kt
  |-AppDB.kt
  |-AppModule.kt
  |-MyApp.kt



@Singleton
@Component(modules = [AppModule::class])
interface AppComponent {
    fun inject(baseViewModel: BaseViewModel)
}


@Database(entities = [
    User::class
], version = 1, exportSchema = true)

abstract class AppDB : RoomDatabase() {
    abstract fun userRepository(): IUserRepository

    companion object{

        @Volatile
        private var db_instance: AppDB? = null

        @Synchronized
        fun getAppDBInstance(context : Context): AppDB {

            return db_instance ?: synchronized(this) {
                val instance = Room.databaseBuilder(
                    context.applicationContext,
                    AppDB::class.java,
                    "TransitPayDB.db3"
                ).allowMainThreadQueries()
                .build()
                db_instance = instance
                instance
            }

        }

    }
}



class MyApp: Application() {

    private lateinit var appComponent: AppComponent

    override fun onCreate() {
        super.onCreate()
        appComponent = DaggerAppComponent.builder().appModule(AppModule(this)).build()
    }

    fun getAppComponent(): AppComponent {
        return appComponent
    }
}


@Module
class AppModule(private val application: Application) {

    @Singleton
    @Provides
    fun getUserRepo(appDB: AppDB): IUserRepository {
        return appDB.userRepository()
    }


    @Singleton
    @Provides
    fun getRoomDBInstance(context: Context): AppDB {
        return AppDB.getAppDBInstance(context)
    }

    @Singleton
    @Provides
    fun provideAppContext(): Context {
        return application.applicationContext
    }

}

And in my Manifest, I added this:

android:name=".configurations.MyApp"

I have normal transaction when the phone is disconnected from the debugger. and also I can see the databases and data when Im debugging. but my problem is when I hit debug again, all the data are gone and I have to repopulate all the test data again.

is there something wrong with my configurations?

by the way this is how I inject my repositories:

open class BaseViewModel(application: Application) : AndroidViewModel(application) {

    @Inject lateinit var userRepository: IUserRepository

    init {
        (application as MyApp).getAppComponent().inject(this)
        sharedUserId = sharedPrefs.getInt("userId",0)
        sharedCompanyId = sharedPrefs.getInt("companyId",0)
        sharedRoleId = sharedPrefs.getInt("roleId",0)
        sharedFullName = sharedPrefs.getString("fullName","")
        sharedApiToken = sharedPrefs.getString("apiToken","")
    }

}

Thanks in advance.

Answer 1

Okay, so this is a rookie mistake.

I have 'Clear app storage before deployment' option ticked. It needs to be unticked to prevent android studio from clearing apps storage.