---
title: "Nutrient 6.4 migration guide"
canonical_url: "https://www.nutrient.io/guides/android/migration-guides/pspdfkit-6-4-migration-guide/"
md_url: "https://www.nutrient.io/guides/android/migration-guides/pspdfkit-6-4-migration-guide.md"
last_updated: "2026-05-30T02:20:01.165Z"
description: "Discover the latest Nutrient Android SDK 6.4, featuring updated build versions, API changes, and crucial migration tips for developers."
---

## Updated build versions

With Nutrient 6.4, we updated various build properties and versions.

- Changed: The Android Gradle plugin used to build Nutrient was updated to version `3.6.3`. All sample applications now use Android Gradle plugin `3.6.3` as well.

## API changes

- Removed: `com.pspdfkit.internal.views.page.PageLayout`

  With Nutrient Android SDK 6.4, we reenabled minification for the previously non-minified framework-internal `PageLayout` class. If you were relying on this class in your builds, it’s necessary to switch to an existing suitable public API for replacing the functionality when upgrading to Nutrient Android SDK 6.4. If you have troubles with migrating to public APIs, [reach out to us on support](https://support.nutrient.io/hc/en-us/requests/new) with your specific use case and problem.

- Changed: [`com.pspdfkit.document.processor.PdfProcessorTask#mergePage(...)`](https://www.nutrient.io/api/android/nutrient/com.pspdfkit.document.processor/-pdf-processor-task/merge-page.html)

  The behavior of the two existing `mergePage()` processor methods was changed to now properly account for any rotation set on the target page. Previously, merging pages would lead to unexpected results if the target page had a non-zero rotation set. If your application relies on the old rotation behavior, consider passing in a [`PagePdf`](https://www.nutrient.io/api/android/nutrient/com.pspdfkit.document.processor/-page-pdf/index.html) using a rotated [`Matrix`](http://d.android.com/reference/android/graphics/Matrix.html) instead.
---

## Related pages

- [2024 9 Migration Guide](/guides/android/migration-guides/2024-9-migration-guide.md)
- [10 5 Migration Guide](/guides/android/migration-guides/10-5-migration-guide.md)
- [10 4 Migration Guide](/guides/android/migration-guides/10-4-migration-guide.md)
- [Migrate to electronic signatures](/guides/android/migration-guides/migrating-to-electronic-signatures.md)
- [2024 8 Migration Guide](/guides/android/migration-guides/2024-8-migration-guide.md)
- [Pspdfkit 2 1 Migration Guide](/guides/android/migration-guides/pspdfkit-2-1-migration-guide.md)
- [Nutrient 10 Migration Guide](/guides/android/migration-guides/nutrient-10-migration-guide.md)
- [Pspdfkit 2024 1 Migration Guide](/guides/android/migration-guides/pspdfkit-2024-1-migration-guide.md)
- [Pspdfkit 2024 4 Migration Guide](/guides/android/migration-guides/pspdfkit-2024-4-migration-guide.md)
- [Pspdfkit 2024 7 Migration Guide](/guides/android/migration-guides/pspdfkit-2024-7-migration-guide.md)
- [Pspdfkit 2024 2 Migration Guide](/guides/android/migration-guides/pspdfkit-2024-2-migration-guide.md)
- [Pspdfkit 2024 6 Migration Guide](/guides/android/migration-guides/pspdfkit-2024-6-migration-guide.md)
- [Pspdfkit 4 4 Migration Guide](/guides/android/migration-guides/pspdfkit-4-4-migration-guide.md)
- [Pspdfkit 5 1 Migration Guide](/guides/android/migration-guides/pspdfkit-5-1-migration-guide.md)
- [Pspdfkit 2024 3 Migration Guide](/guides/android/migration-guides/pspdfkit-2024-3-migration-guide.md)
- [Pspdfkit 5 2 Migration Guide](/guides/android/migration-guides/pspdfkit-5-2-migration-guide.md)
- [Migrate to Nutrient 3.0 with ease](/guides/android/migration-guides/pspdfkit-3-migration-guide.md)
- [Pspdfkit 3 1 Migration Guide](/guides/android/migration-guides/pspdfkit-3-1-migration-guide.md)
- [10 3 Migration Guide](/guides/android/migration-guides/10-3-migration-guide.md)
- [Pspdfkit 6 1 Migration Guide](/guides/android/migration-guides/pspdfkit-6-1-migration-guide.md)
- [Migration guide for Android SDK 4 features](/guides/android/migration-guides/pspdfkit-4-migration-guide.md)
- [Pspdfkit 5 3 Migration Guide](/guides/android/migration-guides/pspdfkit-5-3-migration-guide.md)
- [Pspdfkit 6 3 Migration Guide](/guides/android/migration-guides/pspdfkit-6-3-migration-guide.md)
- [Pspdfkit 5 5 Migration Guide](/guides/android/migration-guides/pspdfkit-5-5-migration-guide.md)
- [Pspdfkit 5 Migration Guide](/guides/android/migration-guides/pspdfkit-5-migration-guide.md)
- [Pspdfkit 6 Migration Guide](/guides/android/migration-guides/pspdfkit-6-migration-guide.md)
- [Pspdfkit 6 6 Migration Guide](/guides/android/migration-guides/pspdfkit-6-6-migration-guide.md)
- [Pspdfkit 6 2 Migration Guide](/guides/android/migration-guides/pspdfkit-6-2-migration-guide.md)
- [Pspdfkit 8 8 Migration Guide](/guides/android/migration-guides/pspdfkit-8-8-migration-guide.md)
- [Pspdfkit 7 Migration Guide](/guides/android/migration-guides/pspdfkit-7-migration-guide.md)
- [Pspdfkit 8 7 Migration Guide](/guides/android/migration-guides/pspdfkit-8-7-migration-guide.md)
- [Pspdfkit 8 6 Migration Guide](/guides/android/migration-guides/pspdfkit-8-6-migration-guide.md)
- [Pspdfkit 8 Migration Guide](/guides/android/migration-guides/pspdfkit-8-migration-guide.md)
- [Pspdfkit 8 9 Migration Guide](/guides/android/migration-guides/pspdfkit-8-9-migration-guide.md)
- [Upgrading](/guides/android/advanced-integration/upgrading.md)