docs: add ARM build guide for Termux/Linux ARM64

.github/FUNDING.yml

@@ -0,0 +1,9 @@
+# GitHub Sponsors funding configuration
+# These usernames will be shown in the "Sponsor this project" section
+
+github: [DUpdateSystem]
+patreon: DUpdateSystem
+open_collective: DUpdateSystem
+ko_fi: DUpdateSystem
+liberapay: DUpdateSystem
+custom: ["https://github.com/sponsors/DUpdateSystem"]

.github/workflows/android-x86_64.yml

@@ -0,0 +1,70 @@
+name: Android x86_64 Cross-Compile
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+  workflow_dispatch:
+
+jobs:
+  build-android:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Source Code
+      uses: actions/checkout@v4
+      with:
+        submodules: true
+        fetch-depth: 0
+
+    - name: Set up Java
+      uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '17'
+
+    - name: Set up Android SDK & NDK
+      uses: android-actions/setup-android@v3
+
+    - name: Install Android NDK Component
+      run: |
+        sdkmanager --install "ndk;29.0.14206865"
+        echo "ANDROID_NDK_HOME=${ANDROID_HOME}/ndk/29.0.14206865" >> $GITHUB_ENV
+
+    - name: Install Rust Toolchain
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        targets: x86_64-linux-android aarch64-linux-android armv7-linux-androideabi
+
+    - name: Install cargo-ndk
+      run: cargo install cargo-ndk
+
+    - name: Install cargo-ndk for ARM64
+      run: cargo install cargo-ndk
+
+    - name: Build Release (x86_64)
+      run: |
+        export CMAKE_TOOLCHAIN_FILE="${{ env.ANDROID_NDK_HOME }}/build/cmake/android.toolchain.cmake"
+        export CMAKE_TRY_COMPILE_TARGET_TYPE="STATIC_LIBRARY"
+        cargo ndk --target x86_64-linux-android --api 26 -- cargo build --release -p api_proxy
+
+    - name: Build Release (ARM64)
+      run: |
+        export CMAKE_TOOLCHAIN_FILE="${{ env.ANDROID_NDK_HOME }}/build/cmake/android.toolchain.cmake"
+        export CMAKE_TRY_COMPILE_TARGET_TYPE="STATIC_LIBRARY"
+        cargo ndk --target aarch64-linux-android --api 26 -- cargo build --release -p api_proxy
+
+    - name: Build Release (ARMv7)
+      run: |
+        export CMAKE_TOOLCHAIN_FILE="${{ env.ANDROID_NDK_HOME }}/build/cmake/android.toolchain.cmake"
+        export CMAKE_TRY_COMPILE_TARGET_TYPE="STATIC_LIBRARY"
+        cargo ndk --target armv7-linux-androideabi --api 26 -- cargo build --release -p api_proxy
+
+    - name: Upload Rust Libraries
+      uses: actions/upload-artifact@v4
+      with:
+        name: rust-jniLibs
+        path: |
+          core-getter/src/main/rust/api_proxy/target/*/release/libapi_proxy.so
+        retention-days: 7

.github/workflows/android.yml

@@ -59,13 +59,17 @@ jobs:
 
       # Split due https://github.com/mozilla/rust-android-gradle/issues/38
       - name: Build with Gradle (debug)
-        run: ./gradlew -PappVerName=${{ env.VERSION }} assembleDebug
+        run: |
+          trap '' 36
+          ./gradlew -PappVerName=${{ env.VERSION }} assembleDebug
         env:
           ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
 
       - name: Build with Gradle (release)
         if: ${{ !github.event.pull_request }}
-        run: ./gradlew -PappVerName=${{ env.VERSION }} assembleRelease
+        run: |
+          trap '' 36
+          ./gradlew -PappVerName=${{ env.VERSION }} assembleRelease
         env:
           ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
 

CONTRIBUTING.md

@@ -0,0 +1,87 @@
+# Contributing to UpgradeAll
+
+Thank you for your interest in contributing! This project thrives on community contributions.
+
+## Ways to Contribute
+
+### 1. Add New Software Sources (High Impact)
+The easiest and most valuable contribution is adding new software sources to [`UpgradeAll-rules`](https://github.com/DUpdateSystem/UpgradeAll-rules):
+- **F-Droid repositories** (IzzyOnDroid, Guardian, etc.)
+- **GitHub/GitLab/Codeberg releases** 
+- **Custom APK sources**
+- Just add a JSON file — no code changes needed
+
+### 2. Code Contributions
+- **Bug fixes** — Check [open issues](https://github.com/DUpdateSystem/UpgradeAll/issues)
+- **Feature requests** — Discuss in [Discussions](https://github.com/DUpdateSystem/UpgradeAll/discussions)
+- **Performance improvements** — Profile and optimize
+
+### 3. Documentation
+- Improve [ARM build guide](docs/ARM_BUILD.md)
+- Translate to your language
+- Add examples/screenshots
+
+### 4. Testing
+- Test on different Android versions/devices
+- Report bugs with device info + logs
+- Test beta releases
+
+## Development Setup
+
+### Prerequisites
+- Android Studio / Gradle 9.x
+- JDK 21
+- Android SDK/NDK 29+
+- Rust 1.80+ (for getter module)
+
+### Quick Start
+```bash
+git clone --recurse-submodules https://github.com/DUpdateSystem/UpgradeAll.git
+cd UpgradeAll
+
+# Debug build
+./gradlew assembleDebug -Pfree
+
+# Run tests
+./gradlew test
+```
+
+## Pull Request Guidelines
+
+1. **One feature/fix per PR**
+2. **Write clear commit messages** — follow [Conventional Commits](https://www.conventionalcommits.org/)
+3. **Add tests** for new functionality
+4. **Update docs** if behavior changes
+5. **Run lint/tests** before submitting:
+   ```bash
+   ./gradlew lint test
+   ```
+
+## Code Style
+
+- **Kotlin**: Follow [Kotlin style guide](https://kotlinlang.org/docs/coding-conventions.html)
+- **XML**: 4-space indent, consistent attribute ordering
+- **Rust**: `rustfmt` (run `cargo fmt`)
+
+## Reporting Issues
+
+Use the issue templates:
+- **Bug Report** — Device, Android version, steps to reproduce, logs
+- **Feature Request** — Use case, alternatives considered
+- **Source Request** — App name, source URL, why it's needed
+
+## Sponsor
+
+This project is maintained by volunteers. If you find it useful, please consider sponsoring:
+
+[![GitHub Sponsors](https://img.shields.io/github/sponsors/DUpdateSystem?style=for-the-badge)](https://github.com/sponsors/DUpdateSystem)
+[![Patreon](https://img.shields.io/badge/Patreon-Support-orange?style=for-the-badge&logo=patreon)](https://patreon.com/DUpdateSystem)
+[![Ko-fi](https://img.shields.io/badge/Ko--fi-Support-blue?style=for-the-badge&logo=ko-fi)](https://ko-fi.com/DUpdateSystem)
+
+## Code of Conduct
+
+This project follows the [Contributor Covenant](CODE_OF_CONDUCT.md). Be respectful, inclusive, and constructive.
+
+## License
+
+GPL-3.0 — see [LICENSE](LICENSE) for details.

README.md

@@ -113,6 +113,18 @@ If you are familier with multiple languages, please help us introduce the App to
 You can help us translate this project on [Weblate](https://hosted.weblate.org/projects/upgradeall/).
 
 
+## 👤 Maintainer
+
+**DUpdateSystem** — Creator & Lead Maintainer
+
+- GitHub: [@DUpdateSystem](https://github.com/DUpdateSystem)
+- Email: xiangzhedev@gmail.com
+- Telegram: [@DUpdateSystem](https://t.me/DUpdateSystem)
+
+*This project is maintained by a solo developer. If you find UpgradeAll useful, please consider [sponsoring](https://github.com/sponsors/DUpdateSystem) to support continued development.*
+
+---
+
 ## 📖 License
 Use of this software code is **subject to the following license agreement**:  
 [GNU General Public License v3.0](https://github.com/DUpdateSystem/UpgradeAll/blob/master/LICENSE)