Application lifecycle

Domains: Flutter

How do I listen to application lifecycle events?

In Xamarin.Forms, you have an Application that contains OnStart, OnResume and OnSleep. In Flutter you can instead listen to similar lifecycle events by hooking into the WidgetsBinding observer and listening to the didChangeAppLifecycleState() change event.

The observable lifecycle events are:

inactive
The application is in an inactive state and is not receiving user input. This event is iOS only.
paused
The application is not currently visible to the user, is not responding to user input, but is running in the background.
resumed
The application is visible and responding to user input.
suspending
The application is suspended momentarily. This event is Android only.

For more details on the meaning of these states, see the AppLifecycleStatus documentation.

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Flutter

It is an open-source UI software development kit created by Google. It is used to develop applications for Android, iOS, Windows, Mac, Linux, Google Fuchsia and the web.

State

A widget’s state is stored in a State object, separating the widget’s state from its appearance. The state consists of values that can change, like a slider’s current value or whether a checkbox is checked. When the widget’s state changes, the state object calls setState(), telling the framework to redraw the widget..