# ScrollFeedbackProviderCompat

Artifact: [androidx.core:core](https://developer.android.com/jetpack/androidx/releases/core) [View Source](https://cs.android.com/search?q=file:androidx/core/view/ScrollFeedbackProviderCompat.java+class:androidx.core.view.ScrollFeedbackProviderCompat) Added in [1.16.0](https://developer.android.com/jetpack/androidx/releases/core#1.16.0)

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```
public class ScrollFeedbackProviderCompat
```

<br />

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Compat to access `https://developer.android.com/reference/android/view/ScrollFeedbackProvider.html` across different build versions.

## Summary

| ### Public methods |
|---|---|
| `static @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat` | `https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat#createProvider(android.view.View)(@https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/view/View.html view)` Creates an instance of `https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat`. |
| `void` | `https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat#onScrollLimit(int,int,int,boolean)(int inputDeviceId, int source, int axis, boolean isStart)` Call this when the view has reached the scroll limit. |
| `void` | `https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat#onScrollProgress(int,int,int,int)( int inputDeviceId, int source, int axis, int deltaInPixels )` Call this when the view has scrolled. |
| `void` | `https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat#onSnapToItem(int,int,int)(int inputDeviceId, int source, int axis)` Call this when the view has snapped to an item. |

## Public methods

### createProvider

Added in [1.16.0](https://developer.android.com/jetpack/androidx/releases/core#1.16.0)

```
public static @NonNull ScrollFeedbackProviderCompat createProvider(@NonNull View view)
```

Creates an instance of `https://developer.android.com/reference/androidx/core/view/ScrollFeedbackProviderCompat`.

### onScrollLimit

Added in [1.16.0](https://developer.android.com/jetpack/androidx/releases/core#1.16.0)

```
public void onScrollLimit(int inputDeviceId, int source, int axis, boolean isStart)
```

Call this when the view has reached the scroll limit.

Note that a feedback may not be provided on every call to this method. This interface, for instance, may provide feedback on every \`N\`th scroll limit event. For the interface to properly provide feedback when needed, call this method for each scroll limit event that you want to be accounted to scroll limit feedback.

| Parameters |
|---|---|
| `int inputDeviceId` | the ID of the `https://developer.android.com/reference/android/view/InputDevice.html` that caused scrolling to hit limit. |
| `int source` | the input source of the motion that caused scrolling to hit the limit. |
| `int axis` | the axis of `event` that caused scrolling to hit the limit. |
| `boolean isStart` | `true` if scrolling hit limit at the start of the scrolling list, and `false` if the scrolling hit limit at the end of the scrolling list. *start* and *end* in this context are not geometrical references. Instead, they refer to the start and end of a scrolling experience. As such, "start" for some views may be at the bottom of a scrolling list, while it may be at the top of scrolling list for others. |

### onScrollProgress

Added in [1.16.0](https://developer.android.com/jetpack/androidx/releases/core#1.16.0)

```
public void onScrollProgress(
    int inputDeviceId,
    int source,
    int axis,
    int deltaInPixels
)
```

Call this when the view has scrolled.

Different axes have different ways to map their raw axis values to pixels for scrolling. When calling this method, use the scroll values in pixels by which the view was scrolled; do not use the raw axis values. That is, use whatever value is passed to one of View's scrolling methods (example: `https://developer.android.com/reference/android/view/View.html#scrollBy(int, int)`). For example, for vertical scrolling on `https://developer.android.com/reference/android/view/MotionEvent.html#AXIS_SCROLL`, convert the raw axis value to the equivalent pixels by using `https://developer.android.com/reference/android/view/ViewConfiguration.html#getScaledVerticalScrollFactor()`, and use that value for this method call.

Note that a feedback may not be provided on every call to this method. This interface, for instance, may provide feedback for every \`x\` pixels scrolled. For the interface to properly track scroll progress and provide feedback when needed, call this method for each scroll event that you want to be accounted to scroll feedback.

| Parameters |
|---|---|
| `int inputDeviceId` | the ID of the `https://developer.android.com/reference/android/view/InputDevice.html` that caused scroll progress. |
| `int source` | the input source of the motion that caused scroll progress. |
| `int axis` | the axis of `event` that caused scroll progress. |
| `int deltaInPixels` | the amount of scroll progress, in pixels. |

### onSnapToItem

Added in [1.16.0](https://developer.android.com/jetpack/androidx/releases/core#1.16.0)

```
public void onSnapToItem(int inputDeviceId, int source, int axis)
```

Call this when the view has snapped to an item.

| Parameters |
|---|---|
| `int inputDeviceId` | the ID of the `https://developer.android.com/reference/android/view/InputDevice.html` that generated the motion triggering the snap. |
| `int source` | the input source of the motion causing the snap. |
| `int axis` | the axis of `event` that caused the item to snap. |