Why Android Studio compiles C++ to ARMv7 if my phone is ARMv8?

Issue

I have an Mi 9 phone, which has a SnapDragon 855, which as far as I could tell runs ARMv8.

I created a simple C++ NDK project in Android Studio, and tried to link a library compiled for aarch64 which is ARMv8, however it complains because it's trying to compile for ARMv7.

I think ARMv7 can run on ARMv8, but why does it do that? Is it possible to force an ARMv8 compilation? I only have the ARMv8 version of the library.

Solution

modify build.gradle like following:

defaultConfig {

    ndk {
        abiFilters 'arm64-v8a'
    }
}

Answered By - Jake 'Alquimista' LEE