CI: add Android APK build script

Author: icota

ci/test/00_setup_env_android.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2019-2020 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+export LC_ALL=C.UTF-8
+
+export CONTAINER_NAME=ci_android
+export PACKAGES="clang llvm unzip openjdk-8-jdk gradle"
+
+export ANDROID_API_LEVEL=28
+export ANDROID_BUILD_TOOLS_VERSION=28.0.3
+export ANDROID_NDK_VERSION=21.1.6352462
+export ANDROID_TOOLS_URL=https://dl.google.com/android/repository/commandlinetools-linux-6609375_latest.zip
+
+export BITCOIN_CONFIG="--disable-ccache"

ci/test/05_before_script.sh

@@ -22,6 +22,20 @@ if [ -n "$XCODE_VERSION" ] && [ ! -f "$OSX_SDK_PATH" ]; then
   DOCKER_EXEC curl --location --fail "${SDK_URL}/${OSX_SDK_BASENAME}" -o "$OSX_SDK_PATH"
 fi
 
+if [ -n "$ANDROID_TOOLS_URL" ]; then
+  ANDROID_TOOLS_PATH=$DEPENDS_DIR/sdk-sources/android-tools.zip
+  ANDROID_HOME="$DEPENDS_DIR"/SDKs/android
+  ANDROID_NDK_HOME=${ANDROID_HOME}/ndk/${ANDROID_NDK_VERSION}
+
+  DOCKER_EXEC curl --location --fail "${ANDROID_TOOLS_URL}" -o "$ANDROID_TOOLS_PATH"
+  DOCKER_EXEC mkdir -p "${ANDROID_HOME}/cmdline-tools"
+  DOCKER_EXEC unzip -o "$ANDROID_TOOLS_PATH" -d "${ANDROID_HOME}/cmdline-tools"
+  DOCKER_EXEC "yes | ${ANDROID_HOME}/cmdline-tools/tools/bin/sdkmanager --install \"build-tools;${ANDROID_BUILD_TOOLS_VERSION}\" \"platform-tools\" \"platforms;android-${ANDROID_API_LEVEL}\" \"ndk;${ANDROID_NDK_VERSION}\""
+
+  MAKE_COMMAND="ANDROID_SDK=${ANDROID_HOME} ANDROID_NDK=${ANDROID_NDK_HOME} make $MAKEJOBS -C depends HOST=aarch64-linux-android ANDROID_API_LEVEL=${ANDROID_API_LEVEL} ANDROID_TOOLCHAIN_BIN=${ANDROID_HOME}/ndk/${ANDROID_NDK_VERSION}/toolchains/llvm/prebuilt/linux-x86_64/bin/ $DEP_OPTS"
+  DOCKER_EXEC "$MAKE_COMMAND" HOST=aarch64-linux-android
+fi
+
 if [[ ${USE_MEMORY_SANITIZER} == "true" ]]; then
   # Use BDB compiled using install_db4.sh script to work around linking issue when using BDB
   # from depends. See https://github.com/bitcoin/bitcoin/pull/18288#discussion_r433189350 for

ci/test/06_script_a.sh

@@ -6,6 +6,14 @@
 
 export LC_ALL=C.UTF-8
 
+if [ -n "$ANDROID_TOOLS_URL" ]; then
+  DOCKER_EXEC make distclean || true
+  DOCKER_EXEC ./autogen.sh
+  DOCKER_EXEC ./configure $BITCOIN_CONFIG --prefix=$DEPENDS_DIR/aarch64-linux-android || ( (DOCKER_EXEC cat config.log) && false)
+  DOCKER_EXEC "cd src/qt && make $MAKEJOBS && ANDROID_HOME=${ANDROID_HOME} ANDROID_NDK_HOME=${ANDROID_NDK_HOME} make apk"
+  exit 0
+fi
+
 BITCOIN_CONFIG_ALL="--enable-suppress-external-warnings --disable-dependency-tracking --prefix=$DEPENDS_DIR/$HOST --bindir=$BASE_OUTDIR/bin --libdir=$BASE_OUTDIR/lib"
 if [ -z "$NO_WERROR" ]; then
   BITCOIN_CONFIG_ALL="${BITCOIN_CONFIG_ALL} --enable-werror"