hammerspoon spoon to toggle dark/light mode in the Android Emulator using Cmd-Shift-A like in the iOS simulator

init.lua

--- === androidEmulator ===
---
--- Helpful tools for the Android Emulator
---
local obj = {}
obj.__index = obj

-- Metadata
obj.name = "androidEmulator"
obj.version = "0.1.0"
obj.author = "<[email protected]>"
obj.homepage = ""
obj.license = "MIT - https://opensource.org/licenses/MIT"

local appHotkeys = {}

local function createAppSpecificHotkey(app, mods, key, pressedfn)
  local hotkey = hs.hotkey.new(mods, key, pressedfn)

  if not appHotkeys[app] then
      appHotkeys[app] = {}
  end
  table.insert(appHotkeys[app], hotkey)

  local watcher = hs.application.watcher.new(function(appName, eventType)
      if appName ~= app then return end

      if eventType == hs.application.watcher.activated then
          for _, hk in ipairs(appHotkeys[app]) do
              hk:enable()
          end
      else
          for _, hk in ipairs(appHotkeys[app]) do
              hk:disable()
          end
      end
  end)

  -- Start watching
  watcher:start()

  return watcher
end

local function toggleDarkMode()
  local adb = "~/Library/Android/sdk/platform-tools/adb"
  local output = hs.execute(adb .. ' shell "cmd uimode night"')

  local dark_mode = output:find("yes") and "no" or "yes"
  local command = adb .. ' shell "cmd uimode night ' .. dark_mode .. '"'
  hs.execute(command)
end

createAppSpecificHotkey("qemu-system-aarch64", {"cmd", "shift"}, "a", toggleDarkMode)

return obj