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ViewTreeObserver.OnWindowFocusChangeListener
public
static
interface
ViewTreeObserver.OnWindowFocusChangeListener
| android.view.ViewTreeObserver.OnWindowFocusChangeListener
|
Interface definition for a callback to be invoked when the view hierarchy's window
focus state changes.
Summary
Public methods |
|---|
abstract
void
|
onWindowFocusChanged(boolean hasFocus)
Callback method to be invoked when the window focus changes in the view tree.
|
Public methods
onWindowFocusChanged
public abstract void onWindowFocusChanged (boolean hasFocus)
Callback method to be invoked when the window focus changes in the view tree.
| Parameters |
|---|
hasFocus |
boolean: Set to true if the window is gaining focus, false if it is
losing focus. |
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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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10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,["# ViewTreeObserver.OnWindowFocusChangeListener\n\nAdded in [API level 18](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\nViewTreeObserver.OnWindowFocusChangeListener\n============================================\n\n*** ** * ** ***\n\n[Kotlin](/reference/kotlin/android/view/ViewTreeObserver.OnWindowFocusChangeListener \"View this page in Kotlin\") \\|Java\n\n\n`\npublic\nstatic\n\n\ninterface\nViewTreeObserver.OnWindowFocusChangeListener\n`\n\n\n`\n\n\n`\n\n|-----------------------------------------------------------|\n| android.view.ViewTreeObserver.OnWindowFocusChangeListener |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nInterface definition for a callback to be invoked when the view hierarchy's window\nfocus state changes.\n\nSummary\n-------\n\n| ### Public methods ||\n|------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ` abstract void` | ` `[onWindowFocusChanged](/reference/android/view/ViewTreeObserver.OnWindowFocusChangeListener#onWindowFocusChanged(boolean))`(boolean hasFocus) ` Callback method to be invoked when the window focus changes in the view tree. |\n\nPublic methods\n--------------\n\n### onWindowFocusChanged\n\nAdded in [API level 18](/guide/topics/manifest/uses-sdk-element#ApiLevels) \n\n```\npublic abstract void onWindowFocusChanged (boolean hasFocus)\n```\n\nCallback method to be invoked when the window focus changes in the view tree.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|------------|--------------------------------------------------------------------------------------------|\n| `hasFocus` | `boolean`: Set to true if the window is gaining focus, false if it is losing focus. \u003cbr /\u003e |"]]
