# BackoffPolicy

Artifact: [androidx.work:work-runtime](https://developer.android.com/jetpack/androidx/releases/work) [View Source](https://cs.android.com/search?q=file:androidx/work/BackoffPolicy.kt+class:androidx.work.BackoffPolicy) Added in [1.0.0](https://developer.android.com/jetpack/androidx/releases/work#1.0.0)

*** ** * ** ***


```
public enum BackoffPolicy extends Enum<@NonNull BackoffPolicy>
```

<br />

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object.html) |||
| ↳ | [kotlin.Enum](https://developer.android.com/reference/java/lang/Enum.html)\<@[NonNull](https://developer.android.com/reference/androidx/annotation/NonNull) [BackoffPolicy](https://developer.android.com/reference/androidx/work/BackoffPolicy)\> ||
|   | ↳ | [androidx.work.BackoffPolicy](https://developer.android.com/reference/androidx/work/BackoffPolicy) |

*** ** * ** ***

An enumeration of backoff policies when retrying work. These policies are used when you have a return `https://developer.android.com/reference/androidx/work/ListenableWorker.Result#retry()` from a worker to determine the correct backoff time. Backoff policies are set in `https://developer.android.com/reference/androidx/work/WorkRequest.Builder#setBackoffCriteria(androidx.work.BackoffPolicy,kotlin.Long,java.util.concurrent.TimeUnit)` or one of its variants.

## Summary

| ### Enum Values |
|---|---|
| `https://developer.android.com/reference/androidx/work/BackoffPolicy#EXPONENTIAL` | Used to indicate that `https://developer.android.com/reference/androidx/work/WorkManager` should increase the backoff time exponentially |
| `https://developer.android.com/reference/androidx/work/BackoffPolicy#LINEAR` | Used to indicate that `https://developer.android.com/reference/androidx/work/WorkManager` should increase the backoff time linearly |

| ### Public methods |
|---|---|
| `final @https://developer.android.com/reference/androidx/annotation/NonNull https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.enums/-enum-entries/index.html<@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/androidx/work/BackoffPolicy>` | `https://developer.android.com/reference/androidx/work/BackoffPolicy#getEntries()()` Returns an immutable `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.enums/-enum-entries/index.html` list containing the constants of this enum type, in the order they're declared. |
| `static final @https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/androidx/work/BackoffPolicy` | `https://developer.android.com/reference/androidx/work/BackoffPolicy#valueOf(kotlin.String)(@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/java/lang/String.html value)` Returns the enum constant of this type with the specified name. |
| `static final @https://developer.android.com/reference/androidx/annotation/NonNull BackoffPolicy[]` | `https://developer.android.com/reference/androidx/work/BackoffPolicy#values()()` Returns an array containing the constants of this enum type, in the order they're declared. |

## Enum Values

### EXPONENTIAL

```
BackoffPolicy BackoffPolicy.EXPONENTIAL
```

Used to indicate that `https://developer.android.com/reference/androidx/work/WorkManager` should increase the backoff time exponentially

### LINEAR

```
BackoffPolicy BackoffPolicy.LINEAR
```

Used to indicate that `https://developer.android.com/reference/androidx/work/WorkManager` should increase the backoff time linearly

## Public methods

### getEntries

```
public final @NonNull EnumEntries<@NonNull BackoffPolicy> getEntries()
```

Returns an immutable `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.enums/-enum-entries/index.html` list containing the constants of this enum type, in the order they're declared.

### valueOf

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

```
public static final @NonNull BackoffPolicy valueOf(@NonNull String value)
```

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

| Throws |
|---|---|
| `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-illegal-argument-exception/index.html` | if this enum type has no constant with the specified name |

### values

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

```
public static final @NonNull BackoffPolicy[] values()
```

Returns an array containing the constants of this enum type, in the order they're declared.

This method may be used to iterate over the constants.

The function returns a new instance of the array on every call. The array could be mutated, so working with it may also require defensive copying. Consider using `entries` property as a more efficient alternative returning an immutable list of enum entries.