AaronFiore/electrum
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electrum/contrib/android/Dockerfile
SomberNight 4da7b7f55d build: android: use Java 17, as before debian upgrade :/ 
When building on debian 12, we were using Java 17.
On debian 13, Java 17 is not packaged anymore, instead there is Java 21 and 25.
Ideally we should upgrade to Java 21 and just install it from apt.

However old Gradle is not compatible with new Java, so we have to upgrade Gradle for that.
- see https://docs.gradle.org/current/userguide/compatibility.html

Old Gradle is giving build errors with Java 21:
```
Could not compile build file '/home/user/wspace/electrum/.buildozer_qml/android/platform/build-arm64-v8a/dists/Electrum/build.gradle'.
> startup failed:
General error during conversion: Unsupported class file major version 65

java.lang.IllegalArgumentException: Unsupported class file major version 65
```

for our p4a fork, I tried to cherry-pick stuff from upstream:
- 17bf532279
- https://github.com/kivy/python-for-android/pull/3172
    a8f2ca1c5b
- see a01269f779...846a109487

That seems sufficient to upgrade Gradle as far as p4a is concerned.

However that still did not work yet:
- contrib/android/make_barcode_scanner.sh fails, as
    markusfisch/zxing-cpp and markusfisch/CameraView
    are also using too old gradle versions for Java 21
    - it seems they are intentionally doing this to maintain compat with Android 4:
        see d98ed5d0be

So for now maybe the path of least resistance is to downgrade to Java 17 :(
2026-01-30 16:45:13 +00:00

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# based on https://github.com/kivy/python-for-android/blob/master/Dockerfile
FROM debian:trixie@sha256:a3b5f4f0286249a124bfe9845b3aec0f88de32ff31dd8d7e1b945f9f98d116b0
ENV DEBIAN_FRONTEND=noninteractive
ENV ANDROID_HOME="/opt/android"
# need ca-certificates before using snapshot packages
RUN apt update -qq > /dev/null && apt install -qq --yes --no-install-recommends \
ca-certificates
# pin the distro packages.
COPY contrib/android/apt.sources.list /etc/apt/sources.list
COPY contrib/android/apt.preferences /etc/apt/preferences.d/snapshot
# configure locale
RUN apt update -qq > /dev/null && apt install -qq --yes --no-install-recommends --allow-downgrades \
locales && \
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 \
&& apt -y install -qq --no-install-recommends --allow-downgrades \
curl \
wget \
unzip \
ca-certificates \
python3 \
&& apt -y autoremove
ENV ANDROID_NDK_HOME="${ANDROID_HOME}/android-ndk"
#ENV ANDROID_NDK_VERSION="23b"
#ENV ANDROID_NDK_HASH="c6e97f9c8cfe5b7be0a9e6c15af8e7a179475b7ded23e2d1c1fa0945d6fb4382"
#ENV ANDROID_NDK_VERSION="27d"
#ENV ANDROID_NDK_HASH="601246087a682d1944e1e16dd85bc6e49560fe8b6d61255be2829178c8ed15d9"
ENV ANDROID_NDK_VERSION="23d-canary"
ENV ANDROID_NDK_HASH="6944ffc20ab018ff4ef6a403048d0a99d50a0630c3eae690c8f803c452f46f3e"
ENV ANDROID_NDK_HOME_V="${ANDROID_NDK_HOME}-r${ANDROID_NDK_VERSION}"
# get the latest version from https://developer.android.com/ndk/downloads/index.html
ENV ANDROID_NDK_ARCHIVE="android-ndk-r${ANDROID_NDK_VERSION}-linux.zip"
ENV ANDROID_NDK_DL_URL="https://dl.google.com/android/repository/${ANDROID_NDK_ARCHIVE}"
# below disabled in favor of CI build download
# download and install Android NDK
#RUN curl --location --progress-bar \
# "${ANDROID_NDK_DL_URL}" \
# --output "${ANDROID_NDK_ARCHIVE}" \
# && echo "${ANDROID_NDK_HASH} ${ANDROID_NDK_ARCHIVE}" | sha256sum -c - \
# && mkdir --parents "${ANDROID_NDK_HOME_V}" \
# && unzip -q "${ANDROID_NDK_ARCHIVE}" -d "${ANDROID_HOME}" \
# && ln -sfn "${ANDROID_NDK_HOME_V}" "${ANDROID_NDK_HOME}" \
# && rm -rf "${ANDROID_NDK_ARCHIVE}"
# temporary build using NDK from CI
ENV CI_REV="12186248"
ENV CI_NDK_FILE="android-ndk-${CI_REV}-linux-x86_64.zip"
COPY contrib/android/dl-ndk-ci.sh /tmp/
RUN /tmp/dl-ndk-ci.sh https://ci.android.com/builds/submitted/${CI_REV}/linux/latest/${CI_NDK_FILE} \
&& echo "${ANDROID_NDK_HASH} android-ndk-ci-linux-x86_64.zip" | sha256sum -c - \
&& mkdir --parents "${ANDROID_NDK_HOME_V}" \
&& unzip -q "android-ndk-ci-linux-x86_64.zip" -d "${ANDROID_HOME}" \
&& ln -sfn "${ANDROID_NDK_HOME_V}" "${ANDROID_NDK_HOME}" \
&& rm -rf "android-ndk-ci-linux-x86_64.zip"
ENV ANDROID_SDK_HOME="${ANDROID_HOME}/android-sdk"
# get the latest version from https://developer.android.com/studio/index.html
ENV ANDROID_SDK_TOOLS_VERSION="9477386"
ENV ANDROID_SDK_HASH="bd1aa17c7ef10066949c88dc6c9c8d536be27f992a1f3b5a584f9bd2ba5646a0"
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="${ANDROID_SDK_HOME}/cmdline-tools/bin/sdkmanager --sdk_root=${ANDROID_SDK_HOME}"
# download and install Android SDK
RUN curl --location --progress-bar \
"${ANDROID_SDK_TOOLS_DL_URL}" \
--output "${ANDROID_SDK_TOOLS_ARCHIVE}" \
&& echo "${ANDROID_SDK_HASH} ${ANDROID_SDK_TOOLS_ARCHIVE}" | sha256sum -c - \
&& mkdir --parents "${ANDROID_SDK_HOME}" \
&& unzip -q "${ANDROID_SDK_TOOLS_ARCHIVE}" -d "${ANDROID_SDK_HOME}" \
&& rm -rf "${ANDROID_SDK_TOOLS_ARCHIVE}"
# update Android SDK, install Android API, Build Tools...
RUN mkdir --parents "${ANDROID_SDK_HOME}/.android/" \
&& echo '### User Sources for Android SDK Manager' \
> "${ANDROID_SDK_HOME}/.android/repositories.cfg"
# download Java-17 (debian 13 only packages Java-21 and Java-25)
# - we download the amd64 binaries from debian 12 repos
# - we should try to upgrade to Java-21...
# - the main blocker seems to be having to update Gradle (to a version compatible with Java-21)
# - make_barcode_scanner.sh: markusfisch/{zxing-cpp, ...} pins old Gradle
ENV JAVA_JRE_DL_URL="https://snapshot.debian.org/archive/debian/20260130T143028Z/pool/main/o/openjdk-17/openjdk-17-jre-headless_17.0.18+8-1~deb12u1_amd64.deb"
ENV JAVA_JRE_ARCHIVE="openjdk-17-jre-headless.deb"
ENV JAVA_JRE_HASH="5bc36cbb4e383dbea4168d57b5fd9b42375ec8837dd62a1d56677632c3c960e0"
ENV JAVA_JDK_DL_URL="https://snapshot.debian.org/archive/debian/20260130T143028Z/pool/main/o/openjdk-17/openjdk-17-jdk-headless_17.0.18+8-1~deb12u1_amd64.deb"
ENV JAVA_JDK_ARCHIVE="openjdk-17-jdk-headless.deb"
ENV JAVA_JDK_HASH="8841044caa66860a71039342fe3c02b7853b61c518e05970e501faa215b1788a"
RUN apt -y update -qq \
&& apt -y install -qq --no-install-recommends \
ca-certificates-java \
java-common \
libcups2 \
libfontconfig1 \
liblcms2-2 \
libjpeg62-turbo \
libnss3 \
libasound2 \
libfreetype6 \
libharfbuzz0b \
libpcsclite1 \
&& apt -y autoremove \
&& cd /opt \
&& curl --location --progress-bar "${JAVA_JRE_DL_URL}" --output "${JAVA_JRE_ARCHIVE}" \
&& echo "${JAVA_JRE_HASH} ${JAVA_JRE_ARCHIVE}" | sha256sum -c - \
&& dpkg -i "${JAVA_JRE_ARCHIVE}" \
&& rm "${JAVA_JRE_ARCHIVE}" \
&& curl --location --progress-bar "${JAVA_JDK_DL_URL}" --output "${JAVA_JDK_ARCHIVE}" \
&& echo "${JAVA_JDK_HASH} ${JAVA_JDK_ARCHIVE}" | sha256sum -c - \
&& dpkg -i "${JAVA_JDK_ARCHIVE}" \
&& rm "${JAVA_JDK_ARCHIVE}"
# accept Android licenses (JDK necessary!)
RUN yes | ${ANDROID_SDK_MANAGER} --licenses > /dev/null
ENV ANDROID_SDK_BUILD_TOOLS_MAJOR_V="31"
ENV ANDROID_SDK_BUILD_TOOLS_VERSION="31.0.0"
# download platforms, API, build tools
RUN ${ANDROID_SDK_MANAGER} "platforms;android-${ANDROID_SDK_BUILD_TOOLS_MAJOR_V}" > /dev/null && \
${ANDROID_SDK_MANAGER} "build-tools;${ANDROID_SDK_BUILD_TOOLS_VERSION}" > /dev/null && \
${ANDROID_SDK_MANAGER} "extras;android;m2repository" > /dev/null && \
chmod +x "${ANDROID_SDK_HOME}/cmdline-tools/bin/avdmanager"
# download ANT
ENV APACHE_ANT_VERSION="1.10.13"
ENV APACHE_ANT_HASH="776be4a5704158f00ef3f23c0327546e38159389bc8f39abbfe114913f88bab1"
ENV APACHE_ANT_ARCHIVE="apache-ant-${APACHE_ANT_VERSION}-bin.tar.gz"
ENV APACHE_ANT_DL_URL="https://archive.apache.org/dist/ant/binaries/${APACHE_ANT_ARCHIVE}"
ENV APACHE_ANT_HOME="${ANDROID_HOME}/apache-ant"
ENV APACHE_ANT_HOME_V="${APACHE_ANT_HOME}-${APACHE_ANT_VERSION}"
RUN curl --location --progress-bar \
"${APACHE_ANT_DL_URL}" \
--output "${APACHE_ANT_ARCHIVE}" \
&& echo "${APACHE_ANT_HASH} ${APACHE_ANT_ARCHIVE}" | sha256sum -c - \
&& tar -xf "${APACHE_ANT_ARCHIVE}" -C "${ANDROID_HOME}" \
&& ln -sfn "${APACHE_ANT_HOME_V}" "${APACHE_ANT_HOME}" \
&& rm -rf "${APACHE_ANT_ARCHIVE}"
# install system/build dependencies
# https://github.com/kivy/buildozer/blob/master/docs/source/installation.rst#android-on-ubuntu-2004-64bit
RUN apt -y update -q \
&& apt -y install -q --no-install-recommends --allow-downgrades \
wget \
lbzip2 \
patch \
sudo \
git \
zip \
unzip \
rsync \
build-essential \
ccache \
autoconf \
autopoint \
libtool \
pkg-config \
zlib1g-dev \
libncurses-dev \
cmake \
libffi-dev \
libssl-dev \
automake \
gettext \
libltdl-dev \
&& apt -y autoremove \
&& apt -y clean
# cross compile deps for Qt6
RUN apt -y update -qq \
&& apt -y install -qq --no-install-recommends --allow-downgrades \
libopengl-dev \
libegl-dev \
dos2unix \
&& apt -y autoremove \
&& apt -y clean
# create new user to avoid using root; but with sudo access and no password for convenience.
ARG UID=1000
RUN if [ "$UID" != "0" ] ; then useradd --uid $UID --create-home --shell /bin/bash "user" ; fi
RUN usermod -append --groups sudo $(id -nu $UID || echo "user")
RUN echo "%sudo ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
RUN HOME_DIR=$(getent passwd $UID | cut -d: -f6)
ENV WORK_DIR="${HOME_DIR}/wspace" \
PATH="${HOME_DIR}/.local/bin:${PATH}"
WORKDIR ${WORK_DIR}
RUN chown --recursive ${UID} ${WORK_DIR} ${ANDROID_SDK_HOME}
RUN chown ${UID} /opt
USER ${UID}
# build cpython. FIXME we can't use the python3 from apt, as it is too new o.O
# - p4a and buildozer require cython<3 (see https://github.com/kivy/python-for-android/issues/2919)
# but the last such version, cython 0.29.37, can only be built by up to python 3.12
ENV VENV_PYTHON_VERSION="3.12.12"
ENV VENV_PY_VER_MAJOR="3.12"
ENV VENV_PYTHON_HASH="487c908ddf4097a1b9ba859f25fe46d22ccaabfb335880faac305ac62bffb79b"
RUN mkdir --parents "/opt/cpython/download" && cd "/opt/cpython/download" \
&& wget "https://www.python.org/ftp/python/${VENV_PYTHON_VERSION}/Python-${VENV_PYTHON_VERSION}.tgz" \
&& echo "${VENV_PYTHON_HASH} Python-${VENV_PYTHON_VERSION}.tgz" | sha256sum -c - \
&& tar xf "Python-${VENV_PYTHON_VERSION}.tgz" -C "/opt/cpython/download" \
&& cd "Python-${VENV_PYTHON_VERSION}" \
&& mkdir "/opt/cpython/install" \
&& ./configure \
--prefix="/opt/cpython/install" \
-q \
&& make "-j$(nproc)" -s \
&& make -s altinstall \
&& ln -s "/opt/cpython/install/bin/python${VENV_PY_VER_MAJOR}" "/opt/cpython/install/bin/python3"
RUN "/opt/cpython/install/bin/python3" -m ensurepip
# venv, VIRTUAL_ENV is used by buildozer to indicate a venv environment
ENV VIRTUAL_ENV=/opt/venv
RUN "/opt/cpython/install/bin/python3" -m venv ${VIRTUAL_ENV}
ENV PATH="${VIRTUAL_ENV}/bin:${PATH}"
COPY contrib/deterministic-build/requirements-build-base.txt /opt/deterministic-build/
COPY contrib/deterministic-build/requirements-build-android.txt /opt/deterministic-build/
RUN /opt/venv/bin/python3 -m pip install --no-build-isolation --no-dependencies \
-r /opt/deterministic-build/requirements-build-base.txt
RUN /opt/venv/bin/python3 -m pip install --no-build-isolation --no-dependencies --no-binary :all: \
-r /opt/deterministic-build/requirements-build-android.txt
# install buildozer
ENV BUILDOZER_CHECKOUT_COMMIT="4403ecf445f10b5fbf7c74f4621bf2b922ad35b5"
# ^ from branch electrum_20240930 (note: careful with force-pushing! see #8162)
RUN cd /opt \
&& git clone https://github.com/spesmilo/buildozer \
&& cd buildozer \
&& git checkout "${BUILDOZER_CHECKOUT_COMMIT}^{commit}" \
&& /opt/venv/bin/python3 -m pip install --no-build-isolation --no-dependencies -e .
# install python-for-android
ENV P4A_CHECKOUT_COMMIT="a01269f7799587ad74ee40e0b642d917b8db7d4e"
# ^ from branch electrum_20251211 (note: careful with force-pushing! see #8162)
RUN cd /opt \
&& git clone https://github.com/spesmilo/python-for-android \
&& cd python-for-android \
&& git checkout "${P4A_CHECKOUT_COMMIT}^{commit}" \
&& /opt/venv/bin/python3 -m pip install --no-build-isolation --no-dependencies -e .
# build env vars
ENV USE_SDK_WRAPPER=1
ENV GRADLE_OPTS="-Xmx1536M -Dorg.gradle.jvmargs='-Xmx1536M'"
#ENV P4A_FULL_DEBUG=1
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