> 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/android.md).

# ANDROID

- [Installation Guide](https://docs.caf.io/caf-sdk/android/installation-guide.md): Install and configure Certta for Android. Learn SDK requirements, permissions, repositories, dependencies, session setup, runtime token updates, and color theming.
- [Face Liveness](https://docs.caf.io/caf-sdk/android/getting-started-with-the-sdk.md): Install and launch Face Liveness for Android. Learn prerequisites, LivenessConfiguration options, callback events, success and failure results, and error handling.
- [Handling Failures](https://docs.caf.io/caf-sdk/android/getting-started-with-the-sdk/handling-failures.md): Reference for Android Face Liveness failure handling. Learn LivenessFailure types, cause values, provider-specific errors, and how to map failures to clear user guidance.
- [Document Detector](https://docs.caf.io/caf-sdk/android/document-detector.md): Install and launch Document Detector for Android. Learn configuration options, UI setup, customization paths, callback events, and result handling.
- [UI Customizations](https://docs.caf.io/caf-sdk/android/document-detector/ui-customizations.md): Customize Document Detector for Android. Learn how to configure document selection, guidance screens, previews, uploads, retry states, and in-flow messages.
- [Changelog](https://docs.caf.io/caf-sdk/android/changelog.md): Android SDK release notes. Track versions, breaking changes, dependency updates, provider changes, fixes, and migration notes for Face Liveness and Document Detector.
- [Legacy Getting Started with the SDK](https://docs.caf.io/caf-sdk/android/getting-started-with-the-sdk-1.md)
- [Standalone Modules](https://docs.caf.io/caf-sdk/android/standalone-modules.md)
- [Smart Auth](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth.md): Enables you to integrate live facial verification and fingerprint authentication technology into your Android applications, offering a seamless and secure way to authenticate users.
- [Release Notes](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/release-notes.md)
- [Current Version](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/current-version.md)
- [Requirements](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/requirements.md)
- [Gradle Dependencies](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/gradle.md)
- [Gradle Source Code](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/gradle-code.md)
- [Permissions](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/permissions.md)
- [SDK Lifecycle](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/lifecycle.md)
- [Building the SDK](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/builder.md)
- [Start Smart Authentication](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/start-sdk.md)
- [Source Code](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/source-code.md)
- [References](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/references.md)
- [FAQ](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/faq.md)
- [Face Liveness Lite](https://docs.caf.io/caf-sdk/android/standalone-modules/caffacelivenesslite.md): Lightweight face liveness verification SDK for Android. Provides a streamlined flow to verify that a captured face is live, with simple integration and minimal footprint.
- [Handling Failures](https://docs.caf.io/caf-sdk/android/standalone-modules/caffacelivenesslite/handling-failures.md)
- [Ui Customization](https://docs.caf.io/caf-sdk/android/standalone-modules/caffacelivenesslite/ui-customization.md)
- [Changelog](https://docs.caf.io/caf-sdk/android/standalone-modules/caffacelivenesslite/changelog.md)
- [CafSDK](https://docs.caf.io/caf-sdk/android/standalone-modules/readme2.md)
- [Document Detector (DEPRECATED)](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector.md): Capture authentic, high-quality photos of user-submitted documents, allowing you to send them later for analysis in our API.
- [Release Notes](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/release-notes.md)
- [Current Version](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/current-version.md)
- [Requirements](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/requirements.md)
- [Gradle Dependencies](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/gradle.md)
- [Gradle Source Code](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/gradle-code.md)
- [Setting up the SDK](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder.md)
- [Setting properties](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/methods.md)
- [Capture Stages](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/capture_stage.md)
- [Messages Settings](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/messages.md)
- [Customization](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/customization.md): Learn how to customize our SDK and make it look like your app.
- [Security Settings](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/security.md)
- [Detection Steps](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/steps.md)
- [Upload Mode](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/upload.md)
- [Advanced Settings](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/advanced-settings.md): This page presents the default settings that can be made in all SDKs.
- [Proxy configuration](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/advanced-settings/proxy-settings.md)
- [Preview configuration](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/builder/advanced-settings/preview-settings.md): This page explains the possible settings for displaying the capture preview screen.
- [Start Document Detection](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/start-sdk.md)
- [Source Code](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/source-code.md)
- [Google security form](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/google-security-form.md)
- [Reduce SDKs size](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/reduce-sdks-size.md): This page presents some elements that will reduce the size of the SDKs.
- [SDKs response](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/sdks-response.md)
- [References](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/references.md)
- [FAQ](https://docs.caf.io/caf-sdk/android/standalone-modules/document-detector/faq.md)
- [Face Liveness (DEPRECATED)](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness.md): Enables you to integrate live facial verification and fingerprint authentication technology into your Android applications, offering a seamless and secure way to authenticate users.
- [Release Notes](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/release-notes.md)
- [Current Version](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/current-version.md)
- [Requirements](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/requirements.md)
- [Gradle Dependencies](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/gradle.md)
- [Gradle Source Code](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/gradle-code.md)
- [SDK Lifecycle](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/lifecycle.md)
- [Building the SDK](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/builder.md)
- [Start Liveness Verification](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/start-sdk.md)
- [Source Code](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/source-code.md)
- [References](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/references.md)
- [Advanced Features](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/advanced_features.md)
- [FAQ](https://docs.caf.io/caf-sdk/android/standalone-modules/caffaceliveness/faq_caf_face_liveness_sdk.md)
- [Face Authenticator (DEPRECATED)](https://docs.caf.io/caf-sdk/android/standalone-modules/faceauthenticator.md): Enables you to integrate live facial authentication and fingerprint technology into your Android applications, offering a seamless and secure way to authenticate users.
- [Release Notes](https://docs.caf.io/caf-sdk/android/standalone-modules/faceauthenticator/release-notes.md)
- [Face Liveness (DEPRECATED)](https://docs.caf.io/caf-sdk/android/standalone-modules/faceliveness.md): Enables you to integrate live facial verification and fingerprint authentication technology into your Android applications, offering a seamless and secure way to authenticate users.
- [Release Notes](https://docs.caf.io/caf-sdk/android/standalone-modules/faceliveness/release-notes.md)
- [Deprecated SDKs](https://docs.caf.io/caf-sdk/android/standalone-modules/deprecated-sdks.md)
- [DocumentDetector v7 or below (Deprecated)](https://docs.caf.io/caf-sdk/android/standalone-modules/deprecated-sdks/document-detector-deprecated.md)
- [PassiveFaceLiveness (Deprecated)](https://docs.caf.io/caf-sdk/android/standalone-modules/deprecated-sdks/passivefaceliveness-deprecated.md): Smart camera that captures a reliable selfie of your user using artificial intelligence, capable of detecting and disapproving snapshots and recordings. Ideal for your onboarding.
- [FaceAuthenticator (Deprecated)](https://docs.caf.io/caf-sdk/android/standalone-modules/deprecated-sdks/faceauthenticator-deprecated.md): Facematch with proof of life from the user of your app, ideal for login flows or valuable financial transactions.
- [Old Release Notes](https://docs.caf.io/caf-sdk/android/standalone-modules/deprecated-sdks/release-notes.md)
- [Começando com o SDK](https://docs.caf.io/caf-sdk/android/comecando-com-o-sdk.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.caf.io/caf-sdk/android.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.