public boolean back() {
Mode backMode;
switch (currMode) {
case Album:
backMode = Mode.Artist;
break;
case Artist:
backMode = Mode.Genre;
break;
case Genre:
backMode = null;
break;
case Track:
backMode = Mode.Album;
break;
case Dir:
backMode = Mode.Dir;
break;
default:
throw new RuntimeException(currMode.name() + " not expexted here");
}
final List<Filter<? super Tables.Tracks>> filtersAddedByBack = filtersAddWithMode.get(backMode);
if (backMode == null || filtersAddedByBack.isEmpty()) {
return true;
} else {
final Filter<? super Tables.Tracks> filterAddedByBack =
filtersAddedByBack.remove(filtersAddedByBack.size() - 1);
filterList.post(
new Runnable() {
public void run() {
removeFilter(filterAddedByBack);
}
});
change(backMode, null, false);
return false;
}
}