larkintuckerllc

...
public class MainActivity extends AppCompatActivity {
    
    @Inject MyExample mMyExample;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView dateTextView = findViewById(R.id.tvDate);

larkintuckerllc

...
public void onClick(DialogInterface dialog, int which) {
    String name= String.valueOf(nameEditText.getText());
    long date = (new Date()).getTime();
    mTodosViewModel.addTodo(name, date);
}
...

larkintuckerllc

...
public void addTodo(String name, long date) {
    Todo todo = new Todo();
    todo.name = name;
    todo.date = date;
    mDb.todoModel().insertTodo(todo);
}
...

larkintuckerllc

...
@Entity
public class Todo {
    
    @PrimaryKey(autoGenerate = true)
    public int id;
    
    public String name;
    public long date;
    

larkintuckerllc

...
@Dao
public interface TodoDao {
  
    @Query("SELECT * FROM Todo")
    LiveData<List<Todo>> findAllTodos();
  
    @Insert(onConflict = REPLACE)
    void insertTodo(Todo todo);
  

larkintuckerllc

...
public final LiveData<List<Todo>> todos;
private AppDatabase mDb;

public TodosViewModel(Application application) {
    super(application);
    mDb = AppDatabase.getDatabase(getApplication());
    todos = mDb.todoModel().findAllTodos();
}
...

larkintuckerllc

...
mTodosViewModel.todos.observe(this, (todos -> {
     DiffUtil.DiffResult result = DiffUtil.calculateDiff(new DiffUtil.Callback() {
         ...
     });
     result.dispatchUpdatesTo(todosAdapter);
     mTodos = todos;
}));
...

larkintuckerllc

...
public void addTodo(String name, long date) {
    Todo todo = new Todo();
    todo.name = name;
    todo.date = date;
    new Thread(() -> {
        mDb.todoModel().insertTodo(todo);
    }).start();
}

larkintuckerllc

...
Room.databaseBuilder(context.getApplicationContext(),   
    AppDatabase.class, "com.larkintuckerllc.room.db")
    .build();
...

larkintuckerllc

...
mTodosViewModel.todos.observe(this, (todos -> {
     new Thread(() -> {
         DiffUtil.DiffResult result = DiffUtil.calculateDiff(new DiffUtil.Callback() {
             ...
         });
         self.runOnUiThread(() -> {
             result.dispatchUpdatesTo(todosAdapter);
             mTodos = todos;
             mProgressDialog.hide();