Added in API level 1

OnGlobalFocusChangeListener

interface OnGlobalFocusChangeListener
android.view.ViewTreeObserver.OnGlobalFocusChangeListener

Interface definition for a callback to be invoked when the focus state within the view tree changes.

Summary

Public methods
abstract Unit
onGlobalFocusChanged(oldFocus: View!, newFocus: View!)

Callback method to be invoked when the focus changes in the view tree.

Public methods

onGlobalFocusChanged

Added in API level 1
abstract fun onGlobalFocusChanged(
    oldFocus: View!,
    newFocus: View!
): Unit

Callback method to be invoked when the focus changes in the view tree. When the view tree transitions from touch mode to non-touch mode, oldFocus is null. When the view tree transitions from non-touch mode to touch mode, newFocus is null. When focus changes in non-touch mode (without transition from or to touch mode) either oldFocus or newFocus can be null.

Parameters
oldFocus View!: The previously focused view, if any.
newFocus View!: The newly focused View, if any.