alouette

Content above the screen. Modal is the general dialog: the caller controls whether it is open, and it is dismissed by the backdrop, its close button, Escape or the Android back gesture, with its footer pinned below a scrolling body. AlertDialog is the confirmation built on it — ask, acknowledge, or demand a decision that cannot be dismissed — with icon-fixed presets (QuestionAlertDialog, WarningAlertDialog, InfoAlertDialog, SuccessAlertDialog); confirming may be async, and the dialog stays open, locked, until it settles, rendering a failure in place. Popover is the chrome-less escape hatch for content that must escape a clipping ancestor — but a set of actions off a trigger is Menu + MenuItem, never a hand-built Popover. Load when adding a modal, confirmation, alert dialog, or a dropdown escaping a clipping container.