Rubotoを使い、AndroidでのGPS衛星情報をNMEA形式で取得する

nmea_activity.rb

require 'ruboto/widget'

ruboto_import_widgets :LinearLayout, :TextView

java_import 'android.content.Context'
java_import 'android.location.LocationManager'


class NmeaActivity
  def onCreate(bundle)
    super
    @lm = getSystemService(Context::LOCATION_SERVICE)
    @ll = MyLocationListener.new
    

    set_title 'NMEA Example'

    self.content_view = linear_layout orientation: :vertical do
      linear_layout do
        text_view text: 'QZGSV: '
        @qzgsv_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'QZGSA: '
        @qzgsa_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'GPRMC: '
        @gpmrc_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'GNGSA: '
        @gngsa_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'GPGSV: '
        @gpgsv_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'GPGSA: '
        @gpgsa_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'GPGGA: '
        @gpgga_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'PGLOR: '
        @pglor_view = text_view text: ''
      end

      linear_layout do
        text_view text: 'Others: '
        @others_view = text_view text: ''
      end
    end
  end


  def onResume
    super
    @lm.addNmeaListener(MyNMEA.new(self))
    @lm.requestLocationUpdates(LocationManager::GPS_PROVIDER, 1000, 5, @ll)    
  end
  

  def onPause
    super
    Thread.start do
      @lm.removeUpdates @ll
      @lm.removeNmeaListener @ll
    end
  end


  def update_nmea(nmea)
    case nmea.split(',')[0]
    when '$QZGSV'
      @qzgsv_view.text = nmea

    when '$QZGSA'
      @qzgsa_view.text = nmea

    when '$GPRMC'
      @gpmrc_view.text = nmea

    when '$PGLOR'
      @pglor_view.text = nmea

    when '$GNGSA'
      @gngsa_view.text = nmea

    when '$GPGSV'
      @gpgsv_view.text = nmea

    when '$GPGSA'
      @gpgsa_view.text = nmea

    when '$GPGGA'
      @gpgga_view.text = nmea

    else
      @others_view.text = nmea
      
    end
  end
end


class MyNMEA
  def initialize(activity)
    @activity = activity
  end

  def onNmeaReceived(timestamp, nmea)
    @activity.update_nmea(nmea)
  end

  # Required on the Java side when registered
  def hashCode
    hash
  end
end


class MyLocationListener
  # Add "__ruby_object" "equlas" method for error avoidance
  def __ruby_object
  end

  def equals(hoge)
  end

  # Required on the Java side when registered
  def hashCode
    hash
  end
  
  def onLocationChanged(location)
  end

  def onProviderDisabled(provider)
  end

  def onProviderEnabled(provider)
  end

  def onStatusChanged(provider, status, extras)
  end
end