Creates an image for building Android Apps. Also enables instrumented tests ant emulator

Dockerfile

# Dockerfile for Android app build. Can be used for native Android builds.
# 
# Before building, you need to replace the values of variables 
# ANDROID_SDK_LICENSE and ANDROID_SDK_PREVIEW_LICENSE (lines 70 and 71).
# Replace these values with contents of files android-sdk-license
# and android-sdk-preview-license that can be found at ANDROID_SDK/licenses.
# The line breakes are mandatory, use \n to add them. 

FROM ubuntu:18.04

# Never ask for confirmations
ENV DEBIAN_FRONTEND noninteractive

# Update apt-get
RUN rm -rf /var/lib/apt/lists/*
RUN apt-get update
RUN apt-get dist-upgrade -y

# Installing packages
RUN apt-get install -y \
  autoconf \
  build-essential \
  bzip2 \
  curl \
  gcc \
  git \
  groff \
  lib32stdc++6 \
  lib32z1 \
  lib32ncurses5 \
  m4 \
  openssh-client \
  pkg-config \
  software-properties-common \
  unzip \
  wget \
  zip \
  qemu-kvm libvirt-bin \
  ubuntu-vm-builder \
  bridge-utils \
  --no-install-recommends

# Install Java
RUN apt-add-repository ppa:openjdk-r/ppa
RUN apt-get update
RUN apt-get -y install openjdk-8-jdk

# Export JAVA_HOME variable
ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/

# Clean Up Apt-get
RUN rm -rf /var/lib/apt/lists/*
RUN apt-get clean

# Install Android SDK
RUN wget https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip
RUN unzip sdk-tools-linux-4333796
RUN mkdir android-sdk-linux
RUN mv tools android-sdk-linux/tools
RUN rm sdk-tools-linux-4333796.zip

ENV ANDROID_COMPONENTS platform-tools,android-28,build-tools-28.0.1,build-tools-28.0.0

# Environment variables
ENV ANDROID_HOME /android-sdk-linux 
ENV ANDROID_SDK_HOME $ANDROID_HOME

RUN echo "sdk.dir=$ANDROID_HOME" > local.properties

# Accepts licences
ENV ANDROID_SDK_LICENSE "YOUR LICENSE HERE"
ENV ANDROID_SDK_PREVIEW_LICENSE "YOUR LICENSE HERE"

RUN mkdir $ANDROID_SDK_HOME/licenses
RUN printf $ANDROID_SDK_LICENSE > $ANDROID_SDK_HOME/licenses/android-sdk-license
RUN printf $ANDROID_SDK_PREVIEW_LICENSE > $ANDROID_SDK_HOME/licenses/android-sdk-preview-license

# Install Android tools
RUN echo y | $ANDROID_SDK_HOME/tools/bin/sdkmanager "platform-tools" "platforms;android-28" "build-tools;28.0.3" "emulator" "system-images;android-28;default;x86"

RUN echo no | $ANDROID_SDK_HOME/tools/bin/avdmanager create avd -n test -k "system-images;android-28;default;x86"

# Cleaning
RUN apt-get clean