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OnBackStackChangedListener
interface OnBackStackChangedListener
Known Direct Subclasses
| FragmentBreadCrumbs |
Helper class for showing "bread crumbs" representing the fragment stack in an activity.
|
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Interface to watch for changes to the back stack.
Summary
| Public methods |
| abstract Unit |
Called whenever the contents of the back stack change.
|
Public methods
onBackStackChanged
abstract fun onBackStackChanged(): Unit
Deprecated: Deprecated in Java.
Called whenever the contents of the back stack change.
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Last updated 2025-02-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10 UTC."],[],[],null,["# FragmentManager.OnBackStackChangedListener\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \nDeprecated in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)\n\nOnBackStackChangedListener\n==========================\n\n*** ** * ** ***\n\nKotlin \\|[Java](/reference/android/app/FragmentManager.OnBackStackChangedListener \"View this page in Java\") \n\n```\ninterface OnBackStackChangedListener\n```\n\n|-------------------------------------------------------------|\n| [android.app.FragmentManager.OnBackStackChangedListener](#) |\n\n|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Known Direct Subclasses [FragmentBreadCrumbs](/reference/kotlin/android/app/FragmentBreadCrumbs) |--------------------------------------------------------------------------|-----------------------------------------------------------------------------------------| | [FragmentBreadCrumbs](/reference/kotlin/android/app/FragmentBreadCrumbs) | Helper class for showing \"bread crumbs\" representing the fragment stack in an activity. | |\n\n*** ** * ** ***\n\n| **This interface was deprecated in API level 28.**\n|\n| Use the [Support Library](https://developer.android.com/tools/extras/support-library.html) androidx.fragment.app.FragmentManager.OnBackStackChangedListener\n\nInterface to watch for changes to the back stack.\n\nSummary\n-------\n\n| Public methods ||\n|---------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------|\n| abstract [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onBackStackChanged](#onBackStackChanged())`()` Called whenever the contents of the back stack change. |\n\nPublic methods\n--------------\n\n### onBackStackChanged\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nabstract fun onBackStackChanged(): Unit\n```\n\n**Deprecated:** *Deprecated in Java.*\n\nCalled whenever the contents of the back stack change."]]
