Update some specific field of an entity in android Room

Question

I am using android room persistence library for my new project. I want to update some field of table. I have tried like in my Dao -

// Method 1         


        

Answer 1

You could try this, but performance may be worse a little:

@Dao
public abstract class TourDao {

    @Query("SELECT * FROM Tour WHERE id == :id")
    public abstract Tour getTour(int id);

    @Update
    public abstract int updateTour(Tour tour);

    public void updateTour(int id, String end_address) {
        Tour tour = getTour(id);
        tour.end_address = end_address;
        updateTour(tour);
    }
}