> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/caf-sdk-pt-br/android/standalone-modules/caffaceliveness/lifecycle.md).

# Ciclo de vida do SDK

## CafLivenessListener

O `CafLivenessListener` A interface lida com eventos-chave durante o processo de detecção de vivacidade do SDK:

| Evento                                           | Descrição                                                                                   |
| ------------------------------------------------ | ------------------------------------------------------------------------------------------- |
| onCancel()                                       | Disparado quando o usuário cancela o processo.                                              |
| onError(sdkFailure: CafFaceLivenessError)        | Chamado em caso de falha do SDK, com os detalhes do erro fornecidos.                        |
| onLoaded()                                       | Disparado quando o SDK está pronto, se a tela de carregamento estiver desativada.           |
| onLoading()                                      | Indica que o SDK está inicializando, chamado se nenhuma tela de carregamento for exibida.   |
| onSuccess(livenessResult: CafFaceLivenessResult) | Chamado após uma detecção bem-sucedida, com o resultado em `livenessResult.signedResponse`. |

### Exemplo

```kotlin
    private fun setupCafLivenessListener() = object : CafLivenessListener {
        override fun onCancel() {
            println("onCancel")
        }

        override fun onError(sdkFailure: CafFaceLivenessError) {
            println("onError: ${sdkFailure.message}")
        }

        override fun onLoaded() {
            // Este evento só será chamado quando a tela de carregamento não estiver ativada
            println("onLoaded")
        }

        override fun onLoading() {
            // Este evento só será chamado quando a tela de carregamento não estiver ativada
            println("onLoading")
        }

        override fun onSuccess(livenessResult: CafFaceLivenessResult) {
            println("onSuccess: ${livenessResult.signedResponse}")
        }
    }
```


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