@@ -0,0 +1,42 @@
+name: Build
+
+on:
+  push:
+    branches: [ "ci" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Set up Android NDK
+        uses: nttld/setup-ndk@v1
+        with:
+          ndk-version: r28b
+
+      - name: Build proot
+        run: |
+          thirdparty/proot/build.sh
+
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          java-version: 17
+          distribution: temurin
+
+      - name: Build APK
+        run: |
+          ./gradlew assembleDebug
+
+      - name: Upload APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-debug
+          path: app/build/outputs/apk/debug/*.apk