Upgrade Ubuntu and SDK

Dockerfile

@@ -1,9 +1,9 @@
 # Android Dockerfile based on uber/android-build-environment
 
-FROM ubuntu:16.04
+FROM ubuntu:18.04
 
 # SDK version
-ENV ANDROID_SDK_VERSION 3859397
+ENV ANDROID_SDK_VERSION 4333796
 
 # Never ask for confirmations
 ENV DEBIAN_FRONTEND noninteractive
@@ -45,10 +45,10 @@ RUN echo "y" | sdkmanager \
 #  "cmake;3.6.4111459" \
   "extras;google;m2repository" \
   "platform-tools" \
-  "platforms;android-26" \
-  "build-tools;26.0.2"
+  "platforms;android-28" \
+  "build-tools;28.0.2"
 
-# Add more build tools
+# Add release helper
 COPY release /usr/local/bin/release
 
 # Build directory

drone.yml.example

@@ -0,0 +1,11 @@
+pipeline:
+  build:
+    image: 127.0.0.1:5001/builder-android
+    commands:
+    - release
+  release:
+    image: plugins/github-release
+    secrets: [ github_token ]
+    files: app/build/outputs/apk/app-release.apk
+    when:
+      event: tag