Error deleting in multiselect example

[readbeard]

Hi,
I noticed that in the multiselect example, the snackbar is shown even when there is no element selected.
Steps for reproducing:

• Long click on an item
• Delete the item clicking on the trash button
• Wait until the undo snackbar is dismissed
• Click again on the trash button.

[readbeard]

I think you can solve the problem in this way:
In class UndoHelper, in the method

public Snackbar remove(View view, String text, String actionText, @Snackbar.Duration int duration, Set<Integer> positions)

you can add the following line:

if(positions.isEmpty()){
  return Snackbar snackbar = Snackbar.make(view,"No item selected",duration);
}

[mikepenz]

@readbeard this should not happen if the ActionMode is finished when the action is clicked.

mode.finish() should do the job here:
https://github.com/mikepenz/FastAdapter/blob/develop/app/src/main/java/com/mikepenz/fastadapter/app/MultiselectSampleActivity.java#L157

Related to #94

[readbeard]

Hi,
i think your fix won't work. In fact, if you call mode.finish(), the undo operation won't work anymore. I tried it before your reply, and that's the reason why i posted my solution.
Do you confirm that?
Thanks