# TrustedWebActivityCallback

Artifact: [androidx.browser:browser](https://developer.android.com/jetpack/androidx/releases/browser) [View Source](https://cs.android.com/search?q=file:androidx/browser/trusted/TrustedWebActivityCallback.java+class:androidx.browser.trusted.TrustedWebActivityCallback) Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/browser#1.3.0)

*** ** * ** ***


```
abstract class TrustedWebActivityCallback
```

<br />

*** ** * ** ***

A callback class for browser to get messages from client app. The callbacks should be called via `https://developer.android.com/reference/kotlin/androidx/browser/trusted/TrustedWebActivityCallbackRemote` on client app.

## Summary

| ### Public constructors |
|---|
| `https://developer.android.com/reference/kotlin/androidx/browser/trusted/TrustedWebActivityCallback#TrustedWebActivityCallback()()` |

| ### Public functions |
|---|---|
| `abstract https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `https://developer.android.com/reference/kotlin/androidx/browser/trusted/TrustedWebActivityCallback#onExtraCallback(java.lang.String,android.os.Bundle)(callbackName: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html, args: https://developer.android.com/reference/android/os/Bundle.html?)` Free-form callback that may be provided by the implementation. |

## Public constructors

### TrustedWebActivityCallback

Added in 1.3.0

```
TrustedWebActivityCallback()
```

## Public functions

### onExtraCallback

Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/browser#1.3.0)

```
abstract fun onExtraCallback(callbackName: String, args: Bundle?): Unit
```

Free-form callback that may be provided by the implementation.

**Note:** Clients should **never** rely on this callback to be called and/or to have a defined behavior, as it is entirely implementation-defined and not supported.

This can be used by implementations to add extra callbacks, for testing or experimental purposes.

| Parameters |
|---|---|
| `callbackName: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html` | Name of the extra callback. |
| `args: https://developer.android.com/reference/android/os/Bundle.html?` | Arguments for the callback |