Class: EmulatorRecorder

Inherits:
Recorder show all
Defined in:
lib/capa/emulator_recorder.rb

Instance Method Summary collapse

Constructor Details

#initialize(filename: '') ⇒ EmulatorRecorder 



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# File 'lib/capa/emulator_recorder.rb', line 6

def initialize(filename: '')
  abort('Please provide a name for the video') if filename.blank?
  @filename = filename
end

Instance Method Details

#can_record? ⇒ Boolean 



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# File 'lib/capa/emulator_recorder.rb', line 47

def can_record?
  return false if command?('adb') == false
  # Example response
  #
  # "List of devices attached\n
  # emulator-5554          device product:sdk_gphone_x86 model:Android_SDK_built_for_x86 device:generic_x86 transport_id:1\n
  # emulator-5556          device product:sdk_google_phone_x86 model:Android_SDK_built_for_x86 device:generic_x86 transport_id:2\n\n"
  #
  `adb devices -l`.split("\n").count == 2
end

#cancel ⇒ Object 



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# File 'lib/capa/emulator_recorder.rb', line 34

def cancel
  `adb shell killall screenrecord`
end

#emulator_video_path ⇒ Object 



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# File 'lib/capa/emulator_recorder.rb', line 43

def emulator_video_path
  "/sdcard/#{@filename}"
end

#pull_video_from_emulator ⇒ Object 



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# File 'lib/capa/emulator_recorder.rb', line 38

def pull_video_from_emulator
  # We can specify the device, in case there is more than one connected: -s emulator-5554
  puts `adb pull #{emulator_video_path}`
end

#record ⇒ Object 



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# File 'lib/capa/emulator_recorder.rb', line 11

def record
  abort("You need exactly one emulator or device connected") unless can_record?
  
  Signal.trap("SIGINT") { raise Capa::UserAbort }
  Signal.trap("SIGTSTP") { raise Capa::UserAbort }

  Thread.new do
    # Might want to add '--size 720x1280' flag. That's the maximum permitted size for video recordings
    # We can specify the device, in case there is more than one connected: -s emulator-5554
    message = `adb shell screenrecord --verbose #{emulator_video_path}`
    
    abort("Maximum permitted resolution is 720x1280. Minimum Android version is Marshmallow.\n"\
      "Please choose a different device.\n"\
      "Tip: Galaxy Nexus works great!") if /err=-38/ =~ message
  end

  puts 'Capturing video from the Android Emulator... Press ENTER to save'
  p = gets.chomp
  `adb shell killall -SIGINT screenrecord`
  sleep 0.5
  pull_video_from_emulator
end