start a CI build of the Android APK

.github/workflows/ant.yml

@@ -0,0 +1,40 @@
+# Mostly copied from https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-ant
+# zlatinb
+
+name: Java CI
+
+on: [push]
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: GetText
+        run: sudo apt install gettext
+      - uses: actions/checkout@v4
+      - name: Set up JDK 8
+        uses: actions/setup-java@v4
+        with:
+          java-version: '8'
+          distribution: 'temurin'
+      - name : Generate override.properties
+        run: |
+          rm -f override.properties
+          echo "build.built-by=GitHub Actions" >> override.properties
+          echo "noExe=true" >> override.properties
+      - name: build with Gradle
+        run: |
+          ./gradlew assembleDebug
+          find . -name '*.apk'
+
+      #- name: Upload installer.jar
+      #  uses: actions/upload-artifact@v4
+      #  with:
+      #    name: I2P-install.jar-${{ github.sha }}
+      #    path: install.jar