Skip Android SDK preview platforms (fix release: use stable android-36.1)

.github/workflows/check-sdk-updates.yml

@@ -73,11 +73,45 @@ jobs:
             exit 0
           fi
 
-          # Get latest available versions
-          # Platform packages now use MAJOR.MINOR versioning (e.g. android-36.1,
-          # android-37.0). Capture the optional minor component and sort by version
-          # so we don't truncate "37.0" to a non-existent "platforms;android-37".
-          LATEST_PLATFORM=$(echo "$PACKAGES" | grep 'platforms;android-' | grep -oP 'android-\K[0-9]+(\.[0-9]+)?' | sort -V | tail -1)
+          # Get latest available versions.
+          #
+          # Platforms must come from the repository manifest, not `sdkmanager --list`:
+          # preview platforms such as android-37.0 are tagged channel-0 (stable) but
+          # carry a <codename> element, so they appear in --list as if stable yet
+          # require the separate Android SDK Preview license at install time, which
+          # breaks the unattended Docker build. The presence of a <codename> element
+          # is the reliable preview marker, so we parse the manifest with a real XML
+          # parser and skip any platform that has one. Versions are MAJOR.MINOR
+          # (e.g. 36.1, 37.0).
+          if ! wget -q "https://dl.google.com/android/repository/repository2-3.xml" -O /tmp/android-repo.xml; then
+            echo "Failed to download SDK repository manifest"
+            echo "updated=false" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+          LATEST_PLATFORM=$(python3 - /tmp/android-repo.xml <<'PY'
+          import re, sys, xml.etree.ElementTree as ET
+
+          def local(tag):  # strip XML namespace, if any
+              return tag.rsplit('}', 1)[-1]
+
+          root = ET.parse(sys.argv[1]).getroot()
+          best, best_key = '', None
+          for pkg in root.iter():
+              if local(pkg.tag) != 'remotePackage' or pkg.get('obsolete') == 'true':
+                  continue
+              m = re.fullmatch(r'platforms;android-(\d+(?:\.\d+)?)', pkg.get('path', ''))
+              if not m:
+                  continue
+              # Skip previews: any descendant <codename> element marks a preview.
+              if any(local(e.tag) == 'codename' for e in pkg.iter()):
+                  continue
+              ver = m.group(1)
+              key = tuple(int(x) for x in ver.split('.'))
+              if best_key is None or key > best_key:
+                  best, best_key = ver, key
+          print(best)
+          PY
+          )
           LATEST_BUILD_TOOLS=$(echo "$PACKAGES" | grep 'build-tools;' | grep -oP 'build-tools;\K[0-9.]+' | sort -V | tail -1)
           LATEST_NDK=$(echo "$PACKAGES" | grep -P '^\s+ndk;' | grep -oP 'ndk;\K[0-9.]+' | sort -V | tail -1)
 

Dockerfile

@@ -1,6 +1,6 @@
 ARG VERSION=2.334.0-ubuntu-noble
 ARG JAVA_VERSION=21
-ARG COMPILE_SDK=37.0
+ARG COMPILE_SDK=36.1
 ARG BUILD_TOOLS=37.0.0
 ARG NDK_VERSION=30.0.14904198
 ARG SDK_TOOLS=8512546_latest