Merge branch 'v3_ghaction' of https://github.com/PojavLauncherTeam/PojavLauncher into v3_ghaction

.github/workflows/android.yml

@@ -0,0 +1,23 @@
+name: Android CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Gradle
+# the gradlew does not have exec perm already so
+      run: chmod +x gradlew && ./gradlew build
+    - name: Upload APK
+      uses: actions/upload-artifact@v1
+      with:
+          name: app
+          path: app/build/outputs/apk/debug/app-debug.apk