@Entity(tableName = "users")
public class User {
@PrimaryKey
public int id;
@ColumnInfo(name = "name")
public String name;
}
@Dao
public interface UserDao {
@Insert
void insert(User user);
@Update
void update(User user);
@Delete
void delete(User user);
@Query("SELECT * FROM users")
List<User> getAllUsers();
}
@Database(entities = {User.class}, version = 1)
public abstract class MyAppDatabase extends RoomDatabase {
public abstract UserDao getUserDao();
private static MyAppDatabase instance;
public static synchronized MyAppDatabase getInstance(Context context) {
if (instance == null) {
instance = Room.databaseBuilder(context.getApplicationContext(),
MyAppDatabase.class, "my_app_database")
.fallbackToDestructiveMigration()
.build();
}
return instance;
}
}
