How to support the 16KB page size of Android 15

[TenXu]

Hello, Team Have you researched how to support the 16KB page size of Android 15 How to make Android WebRTC support the 16KB page size of Android 15

[imndx]

I have tested, v125.6422.04 already supports 16KB page size of Android 15.

[CASL0]

WebRTC has supported 16KB page size since M121.

The following link is the commit with the fix.

• https://chromium.googlesource.com/chromium/src/build/+/8918c32e85c10226c37806fde56f9d5c4dba11f3%5E%21

[DanyloOliinykSSG]

Good afternoon @davidliu, @cloudwebrtc ! I would really appreciate your help on this 🙏 Is there any possibility to have 16Kb page size support to meet Google requirements? Here is info from google about it:

Starting November 1st, 2025, all new apps and updates to existing apps submitted to Google Play and targeting Android 15+ devices must support 16 KB page sizes on 64-bit devices.

Source Android | Set Android userspace to 16 KB Developer Android | Support 16 KB page sizes

Thank you!

[davidliu]

@DanyloOliinykSSG it already supports 16KB page size.

[DanyloOliinykSSG]

@davidliu unfortunately looks like 137.7151.01 still have some issues with 16 Kb page size alignment 😕

I've added this dependency into a sample project (i can share it with you if needed):

implementation 'io.github.webrtc-sdk:android-prefixed:137.7151.01'

Then i've run script provided by Google to verify Android app has all *.so files aligned correctly. Here's script output:

./check_elf_alignment.sh app-release.apk

Recursively analyzing app-release.apk

NOTICE: Zip alignment check requires build-tools version 35.0.0-rc3 or higher.
  You can install the latest build-tools by running the below command
  and updating your $PATH:

    sdkmanager "build-tools;35.0.0-rc3"

=== ELF alignment ===
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/armeabi-v7a/liblkjingle_peerconnection_so.so: \e[31mUNALIGNED\e[0m (2**12)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/armeabi-v7a/libandroidx.graphics.path.so: \e[32mALIGNED\e[0m (2**14)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/x86/liblkjingle_peerconnection_so.so: \e[31mUNALIGNED\e[0m (2**12)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/x86/libandroidx.graphics.path.so: \e[32mALIGNED\e[0m (2**14)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/arm64-v8a/liblkjingle_peerconnection_so.so: \e[32mALIGNED\e[0m (2**14)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/arm64-v8a/libandroidx.graphics.path.so: \e[32mALIGNED\e[0m (2**14)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/x86_64/liblkjingle_peerconnection_so.so: \e[32mALIGNED\e[0m (2**14)
/var/folders/dl/v2fx13714qq6stp0ypqjsxk80000gq/T/app-release_out_XXXXX.2Cd3sRuy6q/lib/x86_64/libandroidx.graphics.path.so: \e[32mALIGNED\e[0m (2**14)
\e[31mFound 2 unaligned libs (only arm64-v8a/x86_64 libs need to be aligned).\e[0m

Please, note the UNALIGNED x86/liblkjingle_peerconnection_so.so and armeabi-v7a/liblkjingle_peerconnection_so.so

Am i missing something? Thank you!

[davidliu]

@DanyloOliinykSSG As the script mentions, only arm64-v8a/x86_64 libs need to be aligned. The libs you pointed at are not for 64-bit platforms and thus are not required to be aligned.

[DanyloOliinykSSG]

@davidliu thank you for pointing that out! Looks like everything is fine then 🙏 Have a nice day 😌

[h001erolee]

To support the 16KB page size, I changed the dependency library from org.webrtc:google-webrtc:1.0.30039 to io.github.webrtc-sdk:android:137.7151.03. I noticed that after the voice call ended, the microphone still shows "In Use"。It didn't happen before 。I have already called AudioTrack.dispose(), do I need to call any other methods?