# CustomFilter

# CustomFilter

Artifact:[androidx.test:runner](https://developer.android.com/jetpack/androidx/releases/test)  
[View Source](https://cs.android.com/search?q=file:androidx/test/filters/CustomFilter.java+class:androidx.test.filters.CustomFilter)

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Kotlin\|[Java](https://developer.android.com/reference/androidx/test/filters/CustomFilter "View this page in Java")

<br />

```
@Retention(value = RetentionPolicy.RUNTIME)
@Target(value = [ElementType.ANNOTATION_TYPE])
annotation CustomFilter
```

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Custom test filters for Android tests.

To add a custom filter to your android test, create an annotation and use @CustomFilter to specify a filter implementation class, which must extend[AbstractFilter](https://developer.android.com/reference/kotlin/androidx/test/filters/AbstractFilter)and handle the test annotation that @CustomFilter is being added to. For example:  

```kotlin
public @interface MyCustomFilterAnnotation {}
```

## Summary

|                                                                                     ### Public functions                                                                                      |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------|
| `abstract `[Class](https://developer.android.com/reference/java/lang/Class.html)`<`[AbstractFilter](https://developer.android.com/reference/kotlin/androidx/test/filters/AbstractFilter)`!>!` | [filterClass](https://developer.android.com/reference/kotlin/androidx/test/filters/CustomFilter#filterClass())`()` |

## Public functions

### filterClass

```
abstract fun filterClass(): Class<AbstractFilter!>!
```