最近又个客户使用 Android.aarch64 平台总是有问题，于是决定装一个 Android 的模拟器跑一下看看。因为是调试动态库，所以不需要图形界面，这样安装的东西少，启动也快，并且不需要启动桌面系统。

下面是在 Ubuntu 14 服务器版本下面，使用 ssh 远程登录，在控制台运行模拟器 （Android arm64），并调试动态库的基本步骤

首先增加一个源，安装并配置 openjdk-8-jdk。Ubuntu 14 原装包里面的 JDK 是 7，Android SDK 中的命令行工具至少要求 8 以上

sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update 
sudo apt-get install openjdk-8-jdk
sudo update-alternatives --config java
sudo update-alternatives --config javac

其次下载Andorid SDK 命令行工具
https://developer.android.google.cn/studio?hl=zh-cn#downloads
从这里下载 Linux 下面的 Command line tools only，并解压下载好的压缩文件，例如

unzip commandlinetools-linux-7302050_latest.zip
ls cmdline-tools

然后使用工具里面的 sdkmanager 下载 build-tools, platform (android 24),system images和模拟器，

cd cmdline-tools
# 查看包
bin/sdkmanager --sdk_root=latest --list
# 安装包
bin/sdkmanager --sdk_root=latest "build-tools;26.0.0" 
bin/sdkmanager --sdk_root=latest "platforms;android-24" 
bin/sdkmanager --sdk_root=latest "system-images;android-24;default;arm64-v8a" 
bin/sdkmanager --sdk_root=latest "emulator"

使用平台工具中的 avdmanager 创建 avd

latest/tools/bin/avdmanager create avd --name test24 -k "system-images;android-24;default;arm64-v8a"

使用模拟器里面的工具 qemu-system-aarch64-headless 启动 avd， gpu 模式使用 guest ，额外指定相关动态库路径 ./latest/emulator/lib64，这样才能成功启动，为了能上传文件，还需要指定选项 -writable-system

sudo adb start-server
sudo LD_LIBRARY_PATH=./latest/emulator/lib64 latest/emulator/qemu/linux-x86_64/qemu-system-aarch64-headless -gpu guest -no-audio -no-snapshot  -writable-system -avd test24 

重新打开一个终端，就可以使用 adb 上传文件和运行相关命令了

sudo adb devices -l
# 使用 root 用户进行操作
sudo adb root

# 上传文件到 /mnt
sudo adb push pyarmor-core/platforms/android.aarch64.0/_pytransform.so /mnt

# 登录模拟器
sudo adb shell
generic_arm64:/ $

常见错误

• 使用 openjdk-7 运行 Android 的命令行工具会报错 Unsupported major.minor version 52.0，解决方案是安装 openjdk-8-jdk

$ bin/sdkmanager 
Exception in thread "main" java.lang.UnsupportedClassVersionError: 
com/android/sdklib/tool/sdkmanager/SdkManagerCli : Unsupported major.minor version 52.0

• 直接运行 emulator，则报错 libdbus-1.so.3: no version information available

jondy@dashingsoft:~/android/cmdline-tools$ latest/tools/emulator -avd test24 
/home/jondy/android/cmdline-tools/latest/emulator/qemu/linux-x86_64/qemu-system-aarch64: /lib/x86_64-linux-gnu/libdbus-1.so.3: no version information available (required by latest/emulator/lib64/qt/lib/libQt5WebEngineCoreAndroidEmu.so.5)

• 解决方案是使用直接使用模拟器目录下面的 qemu-system-aarch64-headless，但是找不到动态库 libtcmalloc_minimal.so.4

jondy@dashingsoft:~/android/cmdline-tools$ sudo latest/emulator/qemu/linux-x86_64/qemu-system-aarch64-headless -avd test24
latest/emulator/qemu/linux-x86_64/qemu-system-aarch64-headless: error while loading shared libraries: libtcmalloc_minimal.so.4: cannot open shared object file: No such file or directory

• 解决方案是指定 LD_LIBRARY_PATH ，因为相关的动态库就在模拟器所在的目录下面。但是还是报错 EglOsGlLibrary

jondy@dashingsoft:~/android/cmdline-tools$ sudo LD_LIBRARY_PATH=./latest/emulator/lib64 latest/emulator/qemu/linux-x86_64/qemu-system-aarch64-headless -avd test24
emulator: WARNING: encryption is off
emulator: feeding guest with passive gps data, in headless mode
EglOsGlLibrary: Could not open GL library libGLESv2.so [libGLESv2.so: cannot open shared object file: No such file or directory]. Trying again with [libGLESv2.so.2]
EglOsGlLibrary: Could not open GL library libGLESv2.so.2 [libGLESv2.so.2: cannot open shared object file: No such file or directory]
EglOsEglDispatcher: Could not open EGL library libEGL.so [libEGL.so: cannot open shared object file: No such file or directory]. Trying again with [libEGL.so.1]
EglOsEglDispatcher: Could not open EGL library libEGL.so.1 [libEGL.so.1: cannot open shared object file: No such file or directory]

• 解决方案是使用选项 -gpu guest，指定 gpu 的模式为 guest

jondy@dashingsoft:~/android/cmdline-tools$ sudo LD_LIBRARY_PATH=./latest/emulator/lib64 latest/emulator/qemu/linux-x86_64/qemu-system-aarch64-headless -gpu guest -avd test24 
emulator: WARNING: System image is writable
emulator: WARNING: encryption is off
emulator: feeding guest with passive gps data, in headless mode
emulator: INFO: GrpcServices.cpp:315: Started GRPC server at 127.0.0.1:8554, security: Local
WARNING. Using fallback path for the emulator registration directory.
emulator: INFO: EmulatorAdvertisement.cpp:93: Advertising in: /home/jondy/.android/avd/running/pid_2057.ini
emulator: Cold boot: requested by the user