Check for IndexOutOfBounds when calculating foreground percentage

[danesfeder]

Closes #621

@electrostat I ended up putting the check in the for loop. The issue looks like what you described in #621 (comment)

mismatch in resumes v pauses size

But maybe it should be:

if (tempResumes.size() < pauses.size() && pauses.size() > 0) {
     tempResumes.add(currentTime);
} else if (pauses.size() < tempResumes.size()) {
     pauses.add(currentTime);
}

Instead of returning 100 like we originally discussed - as the crash is a result of the pauses being smaller than the resumes. Thanks for the help on this!

[palto-ccadoret]

Hi @danesfeder
"pauses" is an ArrayList and by definition is not synchronized, I think that it's not a good way to fix this issue.