@Entity
public class Product {

  @PrimaryKey(autoGenerate = true)
  private int id;
  @ColumnInfo
  private String name;
  @ColumnInfo
  private String category;
  @ColumnInfo
  private int quantity;
  @ColumnInfo
  private float price;
  @ColumnInfo
  private boolean important;
  @ColumnInfo(typeAffinity = ColumnInfo.BLOB)
  private byte[] image;
  . . .
  . . .