Android.Views.ViewTreeObserver.AddOnWindowFocusChangeListener Method
Register a callback to be invoked when the window focus state within the view tree changes.

Syntax

[Android.Runtime.Register("addOnWindowFocusChangeListener", "(Landroid/view/ViewTreeObserver$OnWindowFocusChangeListener;)V", "")]
public void AddOnWindowFocusChangeListener (ViewTreeObserver.IOnWindowFocusChangeListener listener)

Parameters

listener
The callback to add

Exceptions

TypeReason
Java.Lang.IllegalStateExceptionIf ViewTreeObserver.IsAlive returns false

Remarks

Register a callback to be invoked when the window focus state within the view tree changes.

[Android Documentation]

Requirements

Namespace: Android.Views
Assembly: Mono.Android (in Mono.Android.dll)
Assembly Versions: 0.0.0.0
Since: Added in API level 18