.github/workflows

name: Flutter Build

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up JDK
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '17'

      - name: Set up Flutter
        uses: subosito/flutter-action@v2
        with:
          flutter-version: '{flutter_sdk_version}'

      - name: Print Flutter version
        run: flutter --version

      - name: Create and set up Flutter project
        run: |
          flutter create flutter_so
          cd flutter_so
          flutter pub get

      - name: Build APK for arm64 and armeabi-v7a
        run: |
          cd flutter_so
          flutter build apk --release --target-platform android-arm,android-arm64

      - name: Upload libflutter.so for arm64
        uses: actions/upload-artifact@v4
        with:
          name: libflutter_so_arm64
          path: flutter_so/build/app/intermediates/merged_native_libs/release/out/lib/arm64-v8a/libflutter.so

      - name: Upload libflutter.so for armeabi-v7a
        uses: actions/upload-artifact@v4
        with:
          name: libflutter_so_armeabi_v7a
          path: flutter_so/build/app/intermediates/merged_native_libs/release/out/lib/armeabi-v7a/libflutter.so

libflutter.so search (stable)
version code

https://docs.flutter.dev/release/archive

termux-setup-storage
apt update
apt upgrade
pkg install python -y
python fwGenerator.py /storage/emulated/0/MT2/apks/arm64-v8a/libflutter.so