feat: add GitHub Actions CI/CD workflow

Author: MarkADom

.github/workflows/ci.yml

@@ -0,0 +1,86 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: gradle-${{ hashFiles('gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
+          restore-keys: gradle-
+
+      - name: Make gradlew executable
+        run: chmod +x gradlew
+
+      - name: Run unit tests
+        run: ./gradlew testDebugUnitTest
+
+      - name: Upload test report
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-report
+          path: app/build/reports/tests/testDebugUnitTest/
+          retention-days: 7
+
+  build:
+    name: Build Debug APK
+    runs-on: ubuntu-latest
+    needs: test
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: gradle-${{ hashFiles('gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
+          restore-keys: gradle-
+
+      - name: Make gradlew executable
+        run: chmod +x gradlew
+
+      - name: Install Android SDK 36
+        run: |
+          yes | $ANDROID_SDK_ROOT/cmdline-tools/latest/bin/sdkmanager "platforms;android-36" --sdk_root=$ANDROID_SDK_ROOT
+
+      - name: Build debug APK
+        run: ./gradlew assembleDebug
+
+      - name: Upload debug APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: NoiseGuard-debug
+          path: app/build/outputs/apk/debug/app-debug.apk
+          retention-days: 7

README.md

@@ -2,6 +2,7 @@
 
 Open offices run at 65–72 dB. A busy café hits 75. Prolonged exposure above 70 dB causes hearing fatigue, and most people have no idea how loud their environment actually is. NoiseGuard measures it.
 
+![CI](https://github.com/MarkADom/NoiseGuard/actions/workflows/ci.yml/badge.svg)
 ![API](https://img.shields.io/badge/API-24%2B-brightgreen?style=for-the-badge)
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 ![Compose BOM](https://img.shields.io/badge/Compose_BOM-2026.02.01-blue?style=for-the-badge&logo=jetpackcompose&logoColor=white)