What is the best ORM to use for an application so that the application instantly reacts to a change in the database?

Question

Android

Recommend a quick and easy form for compiling an order basket and selected products ..
now I use Sugar Orm and adding and listing work perfectly, but with deleting the problem, specifically:
1) I don’t know how to delete lines, finding them by name
2) I don’t I know how to make the application instantly respond to a change in the database (for example, I deleted several elements in the database, but the ListView did not change)
Help kind people

Answer 1

I don’t know how to make the application instantly respond to a change in the database

ContentProvider is ideal for this, maybe something can be done with rx and orm for a similar effect, but I have not tried it yet