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Run Android VTS with Android R emulator through WSL

Background


  • Android VTS
    The Android Vendor Test Suite (VTS) provides extensive new functionality for Android testing and promotes a test-driven development process.
  • Android R emulator
    Run the latest Android R image from Google CI build artifacts
  • WSL
    WSL is a collection of components that enables native Linux ELF64 binaries to run on Windows. It contains both user mode and kernel mode components. It is primarily comprised of:
    1. User mode session manager service that handles the Linux instance life cycle
    2. Pico provider drivers (lxss.sys, lxcore.sys) that emulate a Linux kernel by translating Linux syscalls
    3. Pico processes that host the unmodified user mode Linux (e.g. /bin/bash)
    It is the space between the user mode Linux binaries and the Windows kernel components where the magic happens. By placing unmodified Linux binaries in Pico processes we enable Linux system calls to be directed into the Windows kernel. The lxss.sys and lxcore.sys drivers translate the Linux system calls into NT APIs and emulate the Linux kernel.

Environmental Requirements

  • Windows 10 64bit computer with Windows build 16215 or later
  • Enable "Windows Subsystem for Linux" optional feature on Windows: check here
  • Android SDK with "emulator", "extras;intel;Hardware_Accelerated_Execution_Manager", "platform-tools", "tools" packages installed
  • Enable Intel(R) Virtualization Technology (VT) and install Intel HAXM

Quick Start

  1. Download android-R.zip and unzip in %SDK_ROOT%\system-images\
  2. Download Pixel_API_30.zip and unzip in %UserProfile%\.android\avd\
  3. Start Android emulator: %SDK_ROOT%\emulator\emulator.exe -avd Pixel_API_30
  4. Check "emulator-5554" in the list of "adb devices"
  5. Create a symlink to let adb.exe can be found in WSL by "adb"
    cd /D %SDK_ROOT%\platform-tools
    mklink adb adb.exe
  6. Download and install Ubuntu 18.04 Aapx through powershell:
    Add-AppxPackage CanonicalGroupLimited.Ubuntu18.04onWindows_1804.2018.817.0_x64__79rhkp1fndgsc.Appx
  7. Download and import my WSL distro backup(eric/1688) through Command Prompt
    wsl --import Ubuntu-18.04 %LOCALAPPDATA%\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState eric-wsl-backup.tar
  8. Run the imported WSL distro from Command Prompt
    wsl --distribution Ubuntu-18.04
  9. In WSL, modify PATH in ~/.bashrc to your Windows adb path
    # for Windows adb.exe
    export PATH=/mnt/c/your/path/to/android_sdk/platform-tools:$PATH
  10. In WSL, run the vts-tradefed
    cd ~/android-vts/tools
    ./vts-tradefed
    run vts-codelab -m VtsCodelabHelloWorldTest
  11. Open the test_result.html report in %LOCALAPPDATA%\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\home\eric\android-vts\results\2019.12.15_03.59.09
    PS. Do NOT edit/modify files from Windows, only WSL can manipulate files inside lxfs

Start from scratch

  • Prepare Android R system image
    • Download android-sdk_XXXXXXX_linux-x86.zip from Google Android aosp-master grid
      For example:
      click sdk_x86_64-sdk Artifacts link in submit 6073524 and download android-sdk_6073524_linux-x86.zip
    • Unzip android-sdk_XXXXXXX_linux-x86.zip and get system-images\android-R
  • Prepare Pixel_API_30 AVD
    create an API_29 AVD then duplicate it and modify the following
    • Pixel_API_30.ini
      replace Pixel_API_29 to Pixel_API_30
      replace target=android-29 to target=android-R
    • Pixel_API_30.avd\config.ini
      remove all lines contain "PlayStore"
      replace all 29 to 30
      set image.sysdir.1=system-images\android-R\x86_64\
  • Install WSL Terminal
    • Search and install "Ubuntu 18.04 LTS" by Microsoft Store
    • Add-AppxPackage XXX.aapx
    • Use MobaXterm as WSL Terminal
  • Setup Ubuntu distro
    sudo sed -i 's/us.archive.ubuntu.com/free.nchc.org.tw/g' /etc/apt/sources.list
    sudo sed -i 's/archive.ubuntu.com/free.nchc.org.tw/g' /etc/apt/sources.list
    sudo sed -i 's/security.ubuntu.com/free.nchc.org.tw/g' /etc/apt/sources.list
    sudo apt-get clean all
    sudo apt-get update
    sudo apt-get upgrade
    sudo apt-get install python-dev \
    python-protobuf protobuf-compiler \
    python-virtualenv python-pip \
    default-jdk \
    unzip
  • Mount Windows filesystem
    sudo mkdir /mnt/d
    sudo mount -t drvfs D: /mnt/d

Reference

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