viewPadding property

The number of physical pixels on each side of the display rectangle into which the view can render, but which may be partially obscured by system UI (such as the system notification area), or physical intrusions in the display (e.g. overscan regions on television screens or phone sensor housings).

Unlike padding, this value does not change relative to viewInsets. For example, on an iPhone X, it will not change in response to the soft keyboard being visible or hidden, whereas padding will.

When this property changes, PlatformDispatcher.onMetricsChanged is called. When using the Flutter framework, using MediaQuery.of to obtain the padding (via MediaQueryData.viewPadding), instead of directly obtaining the viewPadding from a FlutterView, will automatically cause any widgets dependent on the padding to rebuild when it changes, without having to listen to PlatformDispatcher.onMetricsChanged.

The relationship between this viewInsets, viewPadding, and padding are described in more detail in the documentation for FlutterView.

See also:

• WidgetsBindingObserver, for a mechanism at the widgets layer to observe when this value changes.
• MediaQuery.of, a simpler mechanism for the same.
• Scaffold, which automatically applies the padding in material design applications.