Android supports 16KB page size

[wyqlxf]

Add 16 KB page size compatibility
https://developer.android.com/guide/practices/page-sizes?hl=zh-tw
#207

[emersion]

This page makes it sound like this should be done by setting ANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON for Android NDK r27 (Flutter's default version):
https://developer.android.com/guide/practices/page-sizes#compile-r27

[wyqlxf]

@emersion Thank you for the excellent suggestion! I've updated the implementation to follow the official Android guidelines you referenced.

[emersion]

Nice! I wonder, do we need to set it twice (one time in the CMake file, another time in the Gradle file)? Isn't one time enough?

[wyqlxf]

@emersion You're right! The CMakeLists.txt setting was redundant since build.gradle already passes this configuration to CMake. Removed the duplicate line.

[emersion]

Sweet, thanks!

[seriousGeorgeFX]

Doesn't have the build.gradle be adapted further? I only passed the warning in google play console after additionally adjusting this in the webcrypto build.gradle:

dependencies {
classpath 'com.android.tools.build:gradle:8.6.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.2.0"
}

in "android": setting ndkVersion '28.2.13676358' and compileSdkVersion 36
in "defaultconfig": setting minSdkVersion 23

After that, building a release bundle with your pullrequest branch included in my project as a dependency override, finally the warning in the play console went away.

[wyqlxf]

@seriousGeorgeFX Thanks for sharing! Those configurations should be handled by the consuming application, not the library itself. As a Flutter plugin, webcrypto should maintain backward compatibility.