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Added in API level 12

View.OnAttachStateChangeListener

Kotlin |Java

public static interface View.OnAttachStateChangeListener

android.view.View.OnAttachStateChangeListener

Interface definition for a callback to be invoked when this view is attached or detached from its window.

Summary

Public methods
`abstract void`	`onViewAttachedToWindow(View v)` Called when the view is attached to a window.
`abstract void`	`onViewDetachedFromWindow(View v)` Called when the view is detached from a window.

Public methods

onViewAttachedToWindow

Added in API level 12

public abstract void onViewAttachedToWindow (View v)

Called when the view is attached to a window.

Parameters
`v`	`View`: The view that was attached. This value cannot be `null`.

onViewDetachedFromWindow

Added in API level 12

public abstract void onViewDetachedFromWindow (View v)

Called when the view is detached from a window.

Parameters
`v`	`View`: The view that was detached. This value cannot be `null`.

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Last updated 2026-08-03 UTC.

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