However, if you change the display time from 12 to 24-hr, or vice versa, the widget clock will not update until the next minute ticks by.
The relevant class, com.android.systemui.statusbar.Clock, seems to listen for these intents
None of these must get fired when you change the 12/24-hr clock setting.
ACTION_TIME_TICK Intent.ACTION_TIME_CHANGED Intent.ACTION_TIMEZONE_CHANGED Intent.ACTION_CONFIGURATION_CHANGED
Why would it matter? I wanted a automated test that would compare the text displayed on the statusbar clock to a value displayed in an app's textview, after the 12/24-hr setting had been changed outside of the app. The one minute delay affects how the test should be constructed...