What changes I would need to release Application for Android 16KB in Xamarin.Android?
Hi,
in order to meet the "Android 16 KB Memory Page Requirement", is it mandatory to move the app from Xamarin to MAUI or is there any way to do it in Xamarin?
Many thanks.
Regards.
1 answer
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Starry Night 625 Reputation points
Support for Xamarin ended May 1, 2024. So, it is strongly recommended to migrate your app to the .Net Maui. Please check: document .
Starting __November 1,2025__, all new apps and updates targeting __Android 15+__ submitted to Google Play must support __16KB memory page sizes__. This change is aimed at improving app performance, battery efficiency, and compatibility with modern devices.Why 16KB Page Sizes Matter
The shift from the traditional 4KB page size to 16KB allows for more efficient memory management. Benefits include:
- Faster app launches (up to 30% improvement for some apps).
- Improved battery life (~4.5% reduction in power usage during launches).
- Quicker system boot times (~8% faster).
- Better camera startup performance (4.5β6.6% faster).
Starting with Android 15, devices may use a 16 KB memory page size instead of the traditional 4 KB. This change can cause compatibility issues for apps, especially those using native libraries or frameworks like .NET MAUI. Apps must be updated to support this configuration to ensure proper functionality.
Example Issue
Running a .NET MAUI app on an Android 15 emulator configured with 16 KB page sizes may result in crashes during startup due to misaligned shared libraries.
warning XA0141: Android 16 will require 16 KB page sizes, shared library 'libExample.so' does not have a 16 KB page sizeSteps to Ensure Compatibility
1.Update Native Libraries
If your app uses native libraries (e.g., via NDK or third-party SDKs), ensure they are compiled with 16 KB ELF alignment. For example, update your Android.mk file:
LOCAL_LDFLAGS += "-Wl,-z,max-page-size=16384"2. Upgrade Build Tools
Use the latest versions of the Android Gradle Plugin (AGP) and NDK:
- AGP version 8.5.1 or higher.
- NDK version r28 or higher (compiles with 16 KB alignment by default).
3. Rebuild and Test
Rebuild your app with updated tools and test it in a 16 KB environment using:
- Android Emulator with a 16 KB system image.
- Real devices supporting 16 KB page sizes (e.g., Pixel 8).
adb shell getconf PAGE_SIZE # Output should be: 163844. Avoid Hardcoded Page Sizes
Replace any hardcoded PAGE_SIZE constants in your code with dynamic values:
import os page_size = os.sysconf("SC_PAGESIZE")By following these steps, you can ensure your MAUI app is compatible with Android devices using 16 KB page sizes
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Juan Antonio Ortega 5 Reputation points
I know that it is strongly recommended to migrate the app to .Net Maui but the app will be retired in 1-2 years aprox so the customer doesnt want to migrate it.
In the next 1-2 years we might need update it in Google Play but if we dont meet the 16KB requirement it would be impossible.
So for that I am asking if there is any way to meet the 16KB requirement using Xamarin or its totally mandatory to migrate to .Net Maui first.
Many thanks,
Regards.
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Starry Night 625 Reputation points
Microsoft no longer provides any updates or support for Xamarin. Therefore, it is recommended to upgrade to the Maui version as soon as possible. Otherwise, your app may encounter more and more problems in the future. Besides, this will be mandatory for 1st of November 2025, otherwise if your app updates do not support 16 KB memory page sizes, you wonβt be able to release these updates.
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Juan Antonio Ortega 5 Reputation points
Yes, I agree, but I need to know if I can meet the "Android 16 KB Memory Page Requirement" in my Xamarin app or its mandatory to move it to Maui first.
Many thanks.
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Starry Night 625 Reputation points
Unfortunately, due to restrictions from the supplier, there is no way to bypass it. I think the only solution here is to upgrade to MAUI, if that applies in your case.
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