The grid rendered ~740 views and SizeMode.Exact serialised a full copy per host
size, so one update was a 450-540 KB oneway binder push. Three of those overran
the launcher's 1 MB async buffer, and AppWidgetServiceImpl dropped the whole
host on the TransactionTooLargeException — which is why the arrows went dead
after a couple of taps and only came back when the launcher rebound.
One composition sized from the host's own options, day-open taps moved to a
single strip per column, day numbers as bare text, and no views for lanes or a
"+N" row a week doesn't fill. 742 views -> 192.
Jean-Luc Makiola
a0a559648e