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interface OnScrollListener
Interface to listen for the picker scroll state.
Summary
| Constants |
| static Int |
The user had previously been scrolling using touch and performed a fling.
|
| static Int |
The view is not scrolling.
|
| static Int |
The user is scrolling using touch, and their finger is still on the screen.
|
| Public methods |
| abstract Unit |
Callback invoked while the number picker scroll state has changed.
|
Constants
static val SCROLL_STATE_FLING: Int
The user had previously been scrolling using touch and performed a fling.
Value: 2
static val SCROLL_STATE_IDLE: Int
The view is not scrolling.
Value: 0
static val SCROLL_STATE_TOUCH_SCROLL: Int
The user is scrolling using touch, and their finger is still on the screen.
Value: 1
Public methods
abstract fun onScrollStateChange(
view: NumberPicker!,
scrollState: Int
): Unit
Callback invoked while the number picker scroll state has changed.
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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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10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,["# NumberPicker.OnScrollListener\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)\n\nOnScrollListener\n================\n\n*** ** * ** ***\n\nKotlin \\|[Java](/reference/android/widget/NumberPicker.OnScrollListener \"View this page in Java\") \n\n```\ninterface OnScrollListener\n```\n\n|---------------------------------------------------|\n| [android.widget.NumberPicker.OnScrollListener](#) |\n\nInterface to listen for the picker scroll state.\n\nSummary\n-------\n\n| Constants ||\n|-----------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------|\n| static [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [SCROLL_STATE_FLING](#SCROLL_STATE_FLING:kotlin.Int) The user had previously been scrolling using touch and performed a fling. |\n| static [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [SCROLL_STATE_IDLE](#SCROLL_STATE_IDLE:kotlin.Int) The view is not scrolling. |\n| static [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [SCROLL_STATE_TOUCH_SCROLL](#SCROLL_STATE_TOUCH_SCROLL:kotlin.Int) The user is scrolling using touch, and their finger is still on the screen. |\n\n| Public methods ||\n|---------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| abstract [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onScrollStateChange](#onScrollStateChange(android.widget.NumberPicker,%20kotlin.Int))`(`view:` `[NumberPicker](/reference/kotlin/android/widget/NumberPicker)!`, `scrollState:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` Callback invoked while the number picker scroll state has changed. |\n\nConstants\n---------\n\n### SCROLL_STATE_FLING\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nstatic val SCROLL_STATE_FLING: Int\n```\n\nThe user had previously been scrolling using touch and performed a fling. \n\n Value: 2\n\n### SCROLL_STATE_IDLE\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nstatic val SCROLL_STATE_IDLE: Int\n```\n\nThe view is not scrolling. \n\n Value: 0\n\n### SCROLL_STATE_TOUCH_SCROLL\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nstatic val SCROLL_STATE_TOUCH_SCROLL: Int\n```\n\nThe user is scrolling using touch, and their finger is still on the screen. \n\n Value: 1\n\nPublic methods\n--------------\n\n### onScrollStateChange\n\nAdded in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nabstract fun onScrollStateChange(\n view: NumberPicker!, \n scrollState: Int\n): Unit\n```\n\nCallback invoked while the number picker scroll state has changed.\n\n| Parameters ||\n|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `view` | [NumberPicker](/reference/kotlin/android/widget/NumberPicker)!: The view whose scroll state is being reported. |\n| `scrollState` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html): The current scroll state. One of [SCROLL_STATE_IDLE](#SCROLL_STATE_IDLE:kotlin.Int), [SCROLL_STATE_TOUCH_SCROLL](#SCROLL_STATE_TOUCH_SCROLL:kotlin.Int) or [SCROLL_STATE_IDLE](#SCROLL_STATE_IDLE:kotlin.Int). Value is [android.widget.NumberPicker.OnScrollListener#SCROLL_STATE_IDLE](#SCROLL_STATE_IDLE:kotlin.Int), [android.widget.NumberPicker.OnScrollListener#SCROLL_STATE_TOUCH_SCROLL](#SCROLL_STATE_TOUCH_SCROLL:kotlin.Int), or [android.widget.NumberPicker.OnScrollListener#SCROLL_STATE_FLING](#SCROLL_STATE_FLING:kotlin.Int) |"]]
