Rewritten the Dockerfile:

- install all the deb packages by apt-get in one place in the beginning,
  - a separate command for jdk;
  - pip packages are also before the SDK, request latest versions;
  - added commands for the local build.

.buildbot/android/Dockerfile

@@ -1,19 +1,28 @@
-
 # A container for buildbot
+
 FROM ubuntu:focal AS android
 
+ENV DEBIAN_FRONTEND=noninteractive
 ENV ANDROID_HOME="/opt/android"
 
-RUN apt update -qq > /dev/null && apt install -qq --yes --no-install-recommends \
+RUN apt-get update -qq > /dev/null \
-    locales && \
+    && apt-get -y install -qq --no-install-recommends locales \
-    locale-gen en_US.UTF-8
+    && locale-gen en_US.UTF-8
 ENV LANG="en_US.UTF-8" \
     LANGUAGE="en_US.UTF-8" \
     LC_ALL="en_US.UTF-8"
 
-RUN apt -y update -qq \
+# install system/build dependencies
-    && apt -y install -qq --no-install-recommends curl unzip ca-certificates \
+RUN apt-get -y update -qq \
-    && apt -y autoremove
+    && apt-get -y install -qq --no-install-recommends \
+    curl autoconf automake build-essential cmake git nano libtool \
+    libltdl-dev libffi-dev libssl-dev \
+    patch pkg-config python-is-python3 python3-dev python3-pip unzip zip
+
+RUN apt-get -y install -qq --no-install-recommends openjdk-17-jdk \
+    && apt-get -y autoremove
+
+RUN pip install pip install buildozer cython virtualenv
 
 
 ENV ANDROID_NDK_HOME="${ANDROID_HOME}/android-ndk"
@@ -24,9 +33,8 @@ ENV ANDROID_NDK_HOME_V="${ANDROID_NDK_HOME}-r${ANDROID_NDK_VERSION}"
 ENV ANDROID_NDK_ARCHIVE="android-ndk-r${ANDROID_NDK_VERSION}-linux.zip"
 ENV ANDROID_NDK_DL_URL="https://dl.google.com/android/repository/${ANDROID_NDK_ARCHIVE}"
 # download and install Android NDK
-RUN curl "${ANDROID_NDK_DL_URL}" \
+RUN curl "${ANDROID_NDK_DL_URL}" --output "${ANDROID_NDK_ARCHIVE}" \
-        --output "${ANDROID_NDK_ARCHIVE}" \
+    && mkdir -p "${ANDROID_NDK_HOME_V}" \
-    && mkdir --parents "${ANDROID_NDK_HOME_V}" \
     && unzip -q "${ANDROID_NDK_ARCHIVE}" -d "${ANDROID_HOME}" \
     && ln -sfn "${ANDROID_NDK_HOME_V}" "${ANDROID_NDK_HOME}" \
     && rm -rf "${ANDROID_NDK_ARCHIVE}"
@@ -36,35 +44,38 @@ ENV ANDROID_SDK_HOME="${ANDROID_HOME}/android-sdk"
 # get the latest version from https://developer.android.com/studio/index.html
 ENV ANDROID_SDK_TOOLS_VERSION="11076708"
 ENV ANDROID_SDK_BUILD_TOOLS_VERSION="34.0.0"
+ENV ANDROID_SDK_CMDLINE_TOOLS_VERSION="12.0"
 ENV ANDROID_SDK_TOOLS_ARCHIVE="commandlinetools-linux-${ANDROID_SDK_TOOLS_VERSION}_latest.zip"
 ENV ANDROID_SDK_TOOLS_DL_URL="https://dl.google.com/android/repository/${ANDROID_SDK_TOOLS_ARCHIVE}"
-ENV ANDROID_SDK_MANAGER="${ANDROID_SDK_HOME}/tools/bin/sdkmanager --sdk_root=${ANDROID_SDK_HOME}"
+ENV ANDROID_CMDLINE_TOOLS_DIR="${ANDROID_SDK_HOME}/cmdline-tools/${ANDROID_SDK_CMDLINE_TOOLS_VERSION}"
+ENV ANDROID_SDK_MANAGER="${ANDROID_CMDLINE_TOOLS_DIR}/bin/sdkmanager --sdk_root=${ANDROID_SDK_HOME}"
 
 # download and install Android SDK
-RUN curl "${ANDROID_SDK_TOOLS_DL_URL}" \
+RUN curl "${ANDROID_SDK_TOOLS_DL_URL}" --output "${ANDROID_SDK_TOOLS_ARCHIVE}" \
-        --output "${ANDROID_SDK_TOOLS_ARCHIVE}" \
+    && mkdir -p "${ANDROID_SDK_HOME}/cmdline-tools" \
-    && mkdir --parents "${ANDROID_SDK_HOME}" \
+    && unzip -q "${ANDROID_SDK_TOOLS_ARCHIVE}" \
-    && unzip -q "${ANDROID_SDK_TOOLS_ARCHIVE}" -d "${ANDROID_SDK_HOME}" \
+       -d "${ANDROID_SDK_HOME}/cmdline-tools" \
-    && mv "${ANDROID_SDK_HOME}/cmdline-tools" "${ANDROID_SDK_HOME}/tools" \
+    && mv "${ANDROID_SDK_HOME}/cmdline-tools/cmdline-tools" \
+       ${ANDROID_CMDLINE_TOOLS_DIR} \
+    && ln -sfn ${ANDROID_CMDLINE_TOOLS_DIR} "${ANDROID_SDK_HOME}/tools" \
     && rm -rf "${ANDROID_SDK_TOOLS_ARCHIVE}"
 
 # update Android SDK, install Android API, Build Tools...
-RUN mkdir --parents "${ANDROID_SDK_HOME}/.android/" \
+RUN mkdir -p "${ANDROID_SDK_HOME}/.android/" \
     && echo '### User Sources for Android SDK Manager' \
         > "${ANDROID_SDK_HOME}/.android/repositories.cfg"
 
 # accept Android licenses (JDK necessary!)
-RUN apt -y update -qq \
-    && apt -y install -qq --no-install-recommends \
-        openjdk-17-jdk-headless \
-    && apt -y autoremove
 RUN yes | ${ANDROID_SDK_MANAGER} --licenses > /dev/null
 
 # download platforms, API, build tools
-RUN ${ANDROID_SDK_MANAGER} "platforms;android-30" > /dev/null && \
+RUN ${ANDROID_SDK_MANAGER} "platforms;android-30" > /dev/null \
-    ${ANDROID_SDK_MANAGER} "build-tools;${ANDROID_SDK_BUILD_TOOLS_VERSION}" > /dev/null && \
+    && ${ANDROID_SDK_MANAGER} "platforms;android-28" > /dev/null \
-    ${ANDROID_SDK_MANAGER} "extras;android;m2repository" > /dev/null && \
+    && ${ANDROID_SDK_MANAGER} "platform-tools" > /dev/null \
-    chmod +x "${ANDROID_SDK_HOME}/tools/bin/avdmanager"
+    && ${ANDROID_SDK_MANAGER} "build-tools;${ANDROID_SDK_BUILD_TOOLS_VERSION}" \
+    > /dev/null \
+    && ${ANDROID_SDK_MANAGER} "extras;android;m2repository" > /dev/null \
+    && chmod +x "${ANDROID_CMDLINE_TOOLS_DIR}/bin/avdmanager"
 
 # download ANT
 ENV APACHE_ANT_VERSION="1.9.4"
@@ -73,50 +84,19 @@ ENV APACHE_ANT_DL_URL="https://archive.apache.org/dist/ant/binaries/${APACHE_ANT
 ENV APACHE_ANT_HOME="${ANDROID_HOME}/apache-ant"
 ENV APACHE_ANT_HOME_V="${APACHE_ANT_HOME}-${APACHE_ANT_VERSION}"
 
-RUN curl "${APACHE_ANT_DL_URL}" \
+RUN curl "${APACHE_ANT_DL_URL}" --output "${APACHE_ANT_ARCHIVE}" \
-        --output "${APACHE_ANT_ARCHIVE}" \
     && tar -xf "${APACHE_ANT_ARCHIVE}" -C "${ANDROID_HOME}" \
     && ln -sfn "${APACHE_ANT_HOME_V}" "${APACHE_ANT_HOME}" \
     && rm -rf "${APACHE_ANT_ARCHIVE}"
 
-# install system/build dependencies
-RUN apt -y update -qq \
-    && apt -y install -qq --no-install-recommends \
-        python3 \
-        python3-dev \
-        python3-pip \
-        python3-setuptools \
-        python3-venv \
-        wget \
-        lbzip2 \
-        bzip2 \
-        lzma \
-        patch \
-        sudo \
-        software-properties-common \
-        git \
-        zip \
-        unzip \
-        build-essential \
-        ccache \
-        autoconf \
-        libtool \
-        pkg-config \
-        zlib1g-dev \
-        libncurses5-dev \
-        libncursesw5-dev \
-        libtinfo5 \
-        cmake \
-        libffi-dev \
-        libssl-dev \
-        automake \
-        gettext \
-        libltdl-dev \
-        libidn11 \
-    && apt -y autoremove \
-    && apt -y clean
 
-# INSTALL ANDROID PACKAGES
+RUN useradd -m -U builder && mkdir /android
 
-RUN pip3 install buildozer==1.4.0 
+WORKDIR /android
-RUN pip3 install --upgrade cython==0.29.15
+
+RUN chown -R builder.builder /android "${ANDROID_SDK_HOME}/.android" \
+    && chmod -R go+w "${ANDROID_SDK_HOME}/.android"
+
+USER builder
+
+ADD . .