Android, Room “does not write” to database

I make an application, the main content of which is in SQLite database. A quiz in which you are invited to guess the animal.

Began to study Room. Everything works, information is saved and retrieved from db in runtime (see through logs and Toast). But when I open the db itself (physically) in the browser (DB Browser), I see emptiness there. No tables, nothing. And there must be my notes.

What I want to do : open the newly installed application, add several entries to db, close the application, download the created db from the device to the PC and open it in the browser to see its structure.

Step by step what has been done and where the plug is:

Rutanul emulator.

Defined the path of the created Base database through:

Timber.d(getDatabasePath(AnimalDatabase.DATABASE_NAME).getPath());

Received:

/data/user/0/com.example.animalslibrary/databases/AnimalDB

Removed the application. With my hands, I com.example.animalslibrary entire com.example.animalslibrary package.

Install the application.

The application is open, no records have been added (the record is added by hand on the button). Nothing was created on the above path:

Add a record by button. Files are created with my base (?) And something else incomprehensible:

I continue to add entries with the button. My AnimalBD database AnimalBD not change the size, but the third file AnimalBD at a staggering speed (screen after adding five entries):

I close the application. I AnimalBD , I open - emptiness, a clean sheet. There are not even tables.

I run the application again. I try to get a record from the database - gets it.

What am I doing wrong at all? Is it possible to get the base? And if not, what should I do if I want the user to have a full database at the time of the first launch of the application? I won't add a lot of lines to the code. In the comments, I was advised to replace the base created by Room on my own when I first started it - but for this I need to understand how the Room creates what it needs to create an analogue.

Code. I'm not sure that he is needed here at all, because everything works. But let it be. Do not throw stones for overloaded architecture, learn MVC.

Activity

  HomeModel homeModel = new HomeModel(Room.databaseBuilder(this, AnimalDatabase.class, AnimalDatabase.DATABASE_NAME) .allowMainThreadQueries() .build()); HomePresenter presenter = new HomePresenter(homeModel); presenter.attachView(this); findViewById(R.id.add_animal_button).setOnClickListener(v -> presenter.buttonClicked()); findViewById(R.id.show_animal_button).setOnClickListener(v -> presenter.button1Clicked()); Timber.d(getDatabasePath(AnimalDatabase.DATABASE_NAME).getPath()); 

Homepresenter

 public class HomePresenter { private HomeActivity view; private HomeModel model; public HomePresenter(HomeModel homeModel) { this.model = homeModel; } public void attachView(HomeActivity activity) { this.view = activity; } public void detachView() { this.view = null; } public void viewIsReady() { } public void buttonClicked(){ model.addAnimal(); Toast.makeText(view,"ADDED",Toast.LENGTH_LONG).show(); } public void button1Clicked(){ Animal addedAnimal = model.getAnimalById(1); Toast.makeText(view,addedAnimal.getName(),Toast.LENGTH_LONG).show(); } 

Homemodel

 public class HomeModel { private AnimalDatabase animalDB; public HomeModel(AnimalDatabase animalDB) { this.animalDB = animalDB; } public void addAnimal() { Animal animal = new Animal(); animal.setName("TIGER"); animalDB.daoAccess().insertAnimal(animal); } public Animal getAnimalById(int id) { return animalDB.daoAccess().getAnimalById(id); } public void initDB(){} } 

DAO

 @Dao public interface DAO { @Insert void insertAnimal(Animal animal); @Insert void insertAnimals(List<Animal> animalList); @Query("SELECT*FROM animals WHERE animal_id =:animalId") Animal getAnimalById(int animalId); @Update void updateAnimal(Animal animal); @Delete void deleteAnimal(Animal animal); 

}

AnimalDatabase

 @Database(entities = {Animal.class, AnimalPack.class}, version = 1) @TypeConverters(Converters.class) public abstract class AnimalDatabase extends RoomDatabase { public abstract DAO daoAccess(); public static String DATABASE_NAME = "AnimalDB"; public static String DATABASE_NAME_WITH_PREFICS = "AnimalDB.db"; public static String TABLE_ANIMALS_NAME = "animals"; public static String TABLE_PACKS_NAME = "packs"; } 

Animal

 @Entity(tableName = "animals") public class Animal implements Serializable { @PrimaryKey(autoGenerate = true) @ColumnInfo(name = "animal_id") private int animalId; @ColumnInfo(name = "animal_type") private int type; @ColumnInfo(name = "animal_name") private String name; @ColumnInfo(name = "animal_hints") private String hints; @ColumnInfo(name = "animal_opened_hints") private int hintsOpened; @ColumnInfo(name = "animal_hints_total") private int hintsTotal; @ColumnInfo(name = "animal_pack_id") private int packId; @ColumnInfo(name = "animal_answer_image") private String answerImagePath; public Animal() { } //Тьма геттеров и сеттеров //+ пустой конструктор //+ конструктор, содержащий все поля }