Dockerfile to build Android APK

Dockerfile

FROM openjdk:8

ENV ANDROID_SDK_HOME /opt/sdk
ENV ANDROID_HOME /opt/sdk
ENV SDK_TOOLS "3859397"
ENV BUILD_TOOLS "27.0.1"
ENV TARGET_SDK "27"

# Download and extract Android Tools
RUN wget http://dl.google.com/android/repository/sdk-tools-linux-${SDK_TOOLS}.zip -O /tmp/tools.zip && \
	mkdir -p ${ANDROID_HOME} && \
	unzip /tmp/tools.zip -d ${ANDROID_HOME} && \
	rm -v /tmp/tools.zip

# Install SDK Packages
RUN mkdir -p ${ANDROID_HOME}/licenses/ && \
	echo "8933bad161af4178b1185d1a37fbf41ea5269c55" > ${ANDROID_HOME}/licenses/android-sdk-license && \
	mkdir -p /root/.android/ && touch /root/.android/repositories.cfg && \
	${ANDROID_HOME}/tools/bin/sdkmanager "build-tools;${BUILD_TOOLS}" "platform-tools" "platforms;android-${TARGET_SDK}" "extras;android;m2repository" "extras;google;google_play_services" "extras;google;m2repository"

# accept all licenses?
RUN yes | ${ANDROID_HOME}/tools/bin/sdkmanager --licenses

# Make SDK binaries available to shell
ENV PATH="${ANDROID_HOME}/tools/bin:${ANDROID_HOME}/platform-tools:${ANDROID_HOME}/build-tools/27.0.1:${PATH}"

# create a workspace for the android project and copy it there
WORKDIR /root/project
RUN mkdir -p /root/.gradle
RUN mkdir -p /root/project
COPY . /root/project

# build the release apk
CMD ./gradlew assembleRelease