# DecelerateInterpolator

Artifact: [androidx.core:core-animation](https://developer.android.com/jetpack/androidx/releases/core) [View Source](https://cs.android.com/search?q=file:androidx/core/animation/DecelerateInterpolator.java+class:androidx.core.animation.DecelerateInterpolator) Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/core#1.0.0)

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```
public class DecelerateInterpolator implements Interpolator
```

<br />

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An interpolator where the rate of change starts out quickly and then decelerates.

## Summary

| ### Public constructors |
|---|
| `https://developer.android.com/reference/androidx/core/animation/DecelerateInterpolator#DecelerateInterpolator()()` |
| `https://developer.android.com/reference/androidx/core/animation/DecelerateInterpolator#DecelerateInterpolator(float)(float factor)` Constructor |
| `https://developer.android.com/reference/androidx/core/animation/DecelerateInterpolator#DecelerateInterpolator(android.content.Context,android.util.AttributeSet)( @https://jspecify.dev/docs/api/org/jspecify/annotations/NonNull.html https://developer.android.com/reference/android/content/Context.html context, @https://jspecify.dev/docs/api/org/jspecify/annotations/Nullable.html https://developer.android.com/reference/android/util/AttributeSet.html attrs )` |

| ### Public methods |
|---|---|
| `@https://developer.android.com/reference/androidx/annotation/FloatRange(from = 0, to = 1) float` | `https://developer.android.com/reference/androidx/core/animation/DecelerateInterpolator#getInterpolation(float)(@https://developer.android.com/reference/androidx/annotation/FloatRange(from = 0, to = 1) float input)` Maps a value representing the elapsed fraction of an animation to a value that represents the interpolated fraction. |

## Public constructors

### DecelerateInterpolator

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/core#1.0.0)

```
public DecelerateInterpolator()
```

### DecelerateInterpolator

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/core#1.0.0)

```
public DecelerateInterpolator(float factor)
```

Constructor

| Parameters |
|---|---|
| `float factor` | Degree to which the animation should be eased. Setting factor to 1.0f produces an upside-down y=x\^2 parabola. Increasing factor above 1.0f makes exaggerates the ease-out effect (i.e., it starts even faster and ends evens slower) |

### DecelerateInterpolator

Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/core#1.0.0)

```
public DecelerateInterpolator(
    @NonNull Context context,
    @Nullable AttributeSet attrs
)
```

## Public methods

### getInterpolation

```
public @FloatRange(from = 0, to = 1) float getInterpolation(@FloatRange(from = 0, to = 1) float input)
```

Maps a value representing the elapsed fraction of an animation to a value that represents the interpolated fraction. This interpolated value is then multiplied by the change in value of an animation to derive the animated value at the current elapsed animation time.

| Parameters |
|---|---|
| `@https://developer.android.com/reference/androidx/annotation/FloatRange(from = 0, to = 1) float input` | A value between 0 and 1.0 indicating our current point in the animation where 0 represents the start and 1.0 represents the end |

| Returns |
|---|---|
| `@https://developer.android.com/reference/androidx/annotation/FloatRange(from = 0, to = 1) float` | The interpolation value. This value can be more than 1.0 for interpolators which overshoot their targets, or less than 0 for interpolators that undershoot their targets. |