Popup and PopupPresenter aren't necessary, drop'em

[rjrjr]

There's really nothing you can do with them that you can't do more cleanly through the back stack. Generalized something like the following, make the sample app use it, and deprecate the Popups.

class BlenderScreen {
  transient boolean blendingConfirmed;
}

class ReallyBlendScreen {
  final BlenderScreen caller;
}

class BlenderScreenView {  
  BlenderScreen args = ...

  @OnClick(R.id.cancel) void cancel() {
     args.cancelConfirmed = false;
     flow.goTo(new ConfirmationScreen(args));
  }
}

class ReallyBlendScreenView {
  BlenderScreen args = ...

  @OnClick(R.id.confirm) void confirm() {
    args.caller.cancelConfirmed = true;
    flow.goBack();
  }
}

[pforhan]

To clarify, I believe the cancel() method actually should be named showConfirmation() or such. It's the action that causes the confirmation to show, not any cancelation of the confirmation.