Dockerfile

FROM gradle:6.8.3-jre15
USER root
ENV TOOLS_URL="https://dl.google.com/android/repository/commandlinetools-linux-6858069_latest.zip" \
ANDROID_SDK_ROOT="/usr/local/android-sdk" \
ANDROID_SDK=30 \
ANDROID_BUILD_TOOLS=30.0.3 \
PATH="${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin:${ANDROID_SDK_ROOT}/cmdline-tools/tools/bin:${PATH}"

# Download Android SDK
RUN mkdir "$ANDROID_SDK_ROOT" .android "$ANDROID_SDK_ROOT/cmdline-tools" && \
    cd "$ANDROID_SDK_ROOT/cmdline-tools" && \
    curl -o sdk.zip $TOOLS_URL && \
    unzip sdk.zip && \
    rm sdk.zip && \
    mv cmdline-tools tools && \
    yes | $ANDROID_SDK_ROOT/cmdline-tools/tools/bin/sdkmanager --licenses

# Install Android Build Tools
RUN $ANDROID_SDK_ROOT/cmdline-tools/tools/bin/sdkmanager --update
RUN $ANDROID_SDK_ROOT/cmdline-tools/tools/bin/sdkmanager "build-tools;${ANDROID_BUILD_TOOLS}" \
"platforms;android-${ANDROID_SDK}" \
"platform-tools"

# Install xxd
RUN apt-get update && \
    apt-get install xxd