Add a Github Actions workflow file for android

.github/workflows/android-release.yaml

@@ -0,0 +1,51 @@
+name: App Android Release
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  version:
+    name: Create version number
+    runs-on: ubuntu-latest
+    outputs:
+      output1: ${{ steps.version.outputs.version }}
+      output2: ${{ steps.vars.outputs.sha_short }}
+    steps:
+    - uses: actions/checkout@v3
+    - name: Fetch all history for all tags and branches
+      run: |
+        git fetch --prune --depth=1000
+    - name: Create version
+      id: version
+      run: echo "version=v$(grep ^version pubspec.yaml |cut -f 2 -d ' '|cut -f 1 -d '+')" >> $GITHUB_OUTPUT
+    - name: Set outputs
+      id: vars
+      run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+  build:
+    name: Build APK and Create release
+    needs: [ version ]
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-java@v3
+      with:
+        distribution: 'zulu'
+        java-version: '18'
+        #cache: 'gradle'
+    - name: Setup Android SDK
+      uses: android-actions/setup-android@v2
+    - uses: subosito/flutter-action@v2
+      with:
+        channel : 'stable'
+    - run: flutter pub get
+    #- run: flutter test
+    - run: flutter build apk --release --split-per-abi
+    - run: flutter build appbundle
+    - name: Create a Release in GitHub
+      uses: ncipollo/release-action@v1
+      with:
+        artifacts: "build/app/outputs/apk/release/*.apk,build/app/outputs/bundle/release/app-release.aab"
+        token: "${{ secrets.GH_TOKEN }}"
+        tag: "${{ needs.version.outputs.output1 }}"
+        commit: "${{ github.sha }}"

android/settings.gradle

@@ -1,3 +1,4 @@
+/*
 include ':app'
 
 def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
@@ -9,3 +10,21 @@ localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 def flutterSdkPath = properties.getProperty("flutter.sdk")
 assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
 apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"
+*/
+// this new file is needed to build via Github Actions
+// https://github.com/flutter/flutter/issues/55827#issuecomment-623779910
+include ':app'
+
+def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+
+def plugins = new Properties()
+def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
+if (pluginsFile.exists()) {
+    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
+}
+
+plugins.each { name, path ->
+    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
+    include ":$name"
+    project(":$name").projectDir = pluginDirectory
+}