---
title: "Replacing the UI with themes for Android"
slug: "dpo-replace-android-app-sdk-ui-with-themes"
updated: 2026-10-27T20:13:12Z
published: 2026-10-27T20:13:12Z
canonical: "docs.onespan.com/dpo-replace-android-app-sdk-ui-with-themes"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Replacing the UI with themes for Android

The App SDK uses themes for customizing the UI. By modifying properties in the theme you can customize fonts, colors, margins, etc. You can also override a theme to make these changes. To override a theme, declare a local theme with the same name in your application. Below is the list of themes and where they are used.

| **Theme Name** | **Description** |
| --- | --- |
| NNLBaseTheme | The main parent theme for most themes in SDK. Changes here affect most UI elements. |
| NNLDialogTheme | The parent theme for all dialogs in the SDK. Changes here affect all dialogs. |
| NNLSelectionDialogTheme | The theme for the **Select user** dialog and **Choose methods to verify** dialog. |
| NNLMessageDialogTheme | The theme for the dialog that displays the detailed description for an ASM. A user sees this dialog when they do a long press on an authenticator name in the authenticator selector. |
| NNLFPDialogTheme | The theme for the dialog that prompts you to sign in with your fingerprint. This dialog is displayed at the bottom of your screen. |
| NNLSelectAuthenticatorTheme | The theme for the select authenticator activity. |
| NNLSoftpinTheme | The theme of PINActivity in PIN authenticator. |

This table lists themes used by buttons in the App SDK.

| **Theme** | **Description** |
| --- | --- |
| NNLButtonStyle | Parent theme for buttons in the App SDK. |
| NNLYesNoButtonStyle | Parent theme for **Authorize** and **Decline** buttons. |
| NNLAuthorizeButtonStyle | The theme for the **Authorize** button, used in ConfirmationActivity. Parent: NNLYesNoButtonStyle |
| NNLDeclineButtonStyle | The theme for the **Decline** button, used in ConfirmationActivity. Parent: NNLYesNoButtonStyle |
| NNLMngRegsButtonStyle | The theme for the **Remove All** button, used in ManagementFragment.java. |
| NNLMngRegsLayoutTheme | The theme for the Manage authenticators fragment. |