# PerformException

Summary:[Nested Classes](https://developer.android.com/reference/android/support/test/espresso/PerformException#nestedclasses)\|[Methods](https://developer.android.com/reference/android/support/test/espresso/PerformException#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/test/espresso/PerformException#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/test/espresso/PerformException#)  

# PerformException

| This package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider[migrating](https://developer.android.com/jetpack/androidx/migrate)existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library[class mappings](https://developer.android.com/jetpack/androidx/migrate/class-mappings).

`
public

final

class
PerformException
`  
`


``


``


``

extends `[RuntimeException](https://developer.android.com/reference/java/lang/RuntimeException.html)`


``


implements

`[EspressoException](https://developer.android.com/reference/android/support/test/espresso/EspressoException)`


`

|---|---|---|---|------------------------------------------------|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object.html) |||||
| ↳ | [java.lang.Throwable](https://developer.android.com/reference/java/lang/Throwable.html) ||||
|   | ↳ | [java.lang.Exception](https://developer.android.com/reference/java/lang/Exception.html) |||
|   |   | ↳ | [java.lang.RuntimeException](https://developer.android.com/reference/java/lang/RuntimeException.html) ||
|   |   |   | ↳ | android.support.test.espresso.PerformException |

<br />

*** ** * ** ***

Indicates that an exception occurred while performing a ViewAction on the UI thread.

A description of the[ViewAction](https://developer.android.com/reference/android/support/test/espresso/ViewAction), the view being performed on and the cause are included in the error. Note:[FailureHandler](https://developer.android.com/reference/android/support/test/espresso/FailureHandler)s can mutate the exception later to make it more user friendly.

This is generally not recoverable so it is thrown on the instrumentation thread.

## Summary

|                                                                                                                     ### Nested classes                                                                                                                      ||
|----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` class` | [PerformException.Builder](https://developer.android.com/reference/android/support/test/espresso/PerformException.Builder) Builder for[PerformException](https://developer.android.com/reference/android/support/test/espresso/PerformException). |

|                                                                                                    ### Public methods                                                                                                     ||
|----------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| ` `[String](https://developer.android.com/reference/java/lang/String.html) | ` `[getActionDescription](https://developer.android.com/reference/android/support/test/espresso/PerformException#getActionDescription())`() ` |
| ` `[String](https://developer.android.com/reference/java/lang/String.html) | ` `[getViewDescription](https://developer.android.com/reference/android/support/test/espresso/PerformException#getViewDescription())`() `     |

| ### Inherited methods |
|-----------------------|---|
| [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/test/espresso/PerformException#)From class` `[java.lang.Throwable](https://developer.android.com/reference/java/lang/Throwable.html)` ` |----------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------| | ` final void`                                                                                      | ` addSuppressed(`[Throwable](https://developer.android.com/reference/java/lang/Throwable.html)` arg0) `                   | | ` `[Throwable](https://developer.android.com/reference/java/lang/Throwable.html)                   | ` fillInStackTrace() `                                                                                                    | | ` `[Throwable](https://developer.android.com/reference/java/lang/Throwable.html)                   | ` getCause() `                                                                                                            | | ` `[String](https://developer.android.com/reference/java/lang/String.html)                         | ` getLocalizedMessage() `                                                                                                 | | ` `[String](https://developer.android.com/reference/java/lang/String.html)                         | ` getMessage() `                                                                                                          | | ` `[StackTraceElement[]](https://developer.android.com/reference/java/lang/StackTraceElement.html) | ` getStackTrace() `                                                                                                       | | ` final `[Throwable[]](https://developer.android.com/reference/java/lang/Throwable.html)           | ` getSuppressed() `                                                                                                       | | ` `[Throwable](https://developer.android.com/reference/java/lang/Throwable.html)                   | ` initCause(`[Throwable](https://developer.android.com/reference/java/lang/Throwable.html)` arg0) `                       | | ` void`                                                                                            | ` printStackTrace() `                                                                                                     | | ` void`                                                                                            | ` printStackTrace(`[PrintWriter](https://developer.android.com/reference/java/io/PrintWriter.html)` arg0) `               | | ` void`                                                                                            | ` printStackTrace(`[PrintStream](https://developer.android.com/reference/java/io/PrintStream.html)` arg0) `               | | ` void`                                                                                            | ` setStackTrace(`[StackTraceElement[]](https://developer.android.com/reference/java/lang/StackTraceElement.html)` arg0) ` | | ` `[String](https://developer.android.com/reference/java/lang/String.html)                         | ` toString() `                                                                                                            | ||
| [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/test/espresso/PerformException#)From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object.html)` ` |-------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object.html)          | ` clone() `                                                                                | | ` boolean`                                                                          | ` equals(`[Object](https://developer.android.com/reference/java/lang/Object.html)` arg0) ` | | ` void`                                                                             | ` finalize() `                                                                             | | ` final `[Class](https://developer.android.com/reference/java/lang/Class.html)`<?>` | ` getClass() `                                                                             | | ` int`                                                                              | ` hashCode() `                                                                             | | ` final void`                                                                       | ` notify() `                                                                               | | ` final void`                                                                       | ` notifyAll() `                                                                            | | ` `[String](https://developer.android.com/reference/java/lang/String.html)          | ` toString() `                                                                             | | ` final void`                                                                       | ` wait(long arg0, int arg1) `                                                              | | ` final void`                                                                       | ` wait(long arg0) `                                                                        | | ` final void`                                                                       | ` wait() `                                                                                 | ||

## Public methods

### getActionDescription

```
String getActionDescription ()
```

<br />

<br />

|                                     Returns                                     ||
|-------------------------------------------------------------------------|--------|
| [String](https://developer.android.com/reference/java/lang/String.html) | <br /> |

### getViewDescription

```
String getViewDescription ()
```

<br />

<br />

|                                     Returns                                     ||
|-------------------------------------------------------------------------|--------|
| [String](https://developer.android.com/reference/java/lang/String.html) | <br /> |

-

  ## Interfaces

  - [EspressoException](https://developer.android.com/reference/android/support/test/espresso/EspressoException)
  - [FailureHandler](https://developer.android.com/reference/android/support/test/espresso/FailureHandler)
  - [IdlingResource](https://developer.android.com/reference/android/support/test/espresso/IdlingResource)
  - [IdlingResource.ResourceCallback](https://developer.android.com/reference/android/support/test/espresso/IdlingResource.ResourceCallback)
  - [UiController](https://developer.android.com/reference/android/support/test/espresso/UiController)
  - [ViewAction](https://developer.android.com/reference/android/support/test/espresso/ViewAction)
  - [ViewAssertion](https://developer.android.com/reference/android/support/test/espresso/ViewAssertion)
  - [ViewFinder](https://developer.android.com/reference/android/support/test/espresso/ViewFinder)
  - [ViewInteractionComponent](https://developer.android.com/reference/android/support/test/espresso/ViewInteractionComponent)
-

  ## Classes

  - [AmbiguousViewMatcherException.Builder](https://developer.android.com/reference/android/support/test/espresso/AmbiguousViewMatcherException.Builder)
  - [DataInteraction](https://developer.android.com/reference/android/support/test/espresso/DataInteraction)
  - [DataInteraction.DisplayDataMatcher](https://developer.android.com/reference/android/support/test/espresso/DataInteraction.DisplayDataMatcher)
  - [Espresso](https://developer.android.com/reference/android/support/test/espresso/Espresso)
  - [IdlingPolicies](https://developer.android.com/reference/android/support/test/espresso/IdlingPolicies)
  - [IdlingPolicy](https://developer.android.com/reference/android/support/test/espresso/IdlingPolicy)
  - [IdlingRegistry](https://developer.android.com/reference/android/support/test/espresso/IdlingRegistry)
  - [NoMatchingViewException.Builder](https://developer.android.com/reference/android/support/test/espresso/NoMatchingViewException.Builder)
  - [PerformException.Builder](https://developer.android.com/reference/android/support/test/espresso/PerformException.Builder)
  - [Root](https://developer.android.com/reference/android/support/test/espresso/Root)
  - [Root.Builder](https://developer.android.com/reference/android/support/test/espresso/Root.Builder)
  - [ViewInteraction](https://developer.android.com/reference/android/support/test/espresso/ViewInteraction)
-

  ## Exceptions

  - [AmbiguousViewMatcherException](https://developer.android.com/reference/android/support/test/espresso/AmbiguousViewMatcherException)
  - [AppNotIdleException](https://developer.android.com/reference/android/support/test/espresso/AppNotIdleException)
  - [IdlingResourceTimeoutException](https://developer.android.com/reference/android/support/test/espresso/IdlingResourceTimeoutException)
  - [InjectEventSecurityException](https://developer.android.com/reference/android/support/test/espresso/InjectEventSecurityException)
  - [NoActivityResumedException](https://developer.android.com/reference/android/support/test/espresso/NoActivityResumedException)
  - [NoMatchingRootException](https://developer.android.com/reference/android/support/test/espresso/NoMatchingRootException)
  - [NoMatchingViewException](https://developer.android.com/reference/android/support/test/espresso/NoMatchingViewException)
  - [PerformException](https://developer.android.com/reference/android/support/test/espresso/PerformException)