RubotoでNFCを読み込むサンプル

AndroidManifest.xml

<?xml version='1.0' encoding='UTF-8'?>
<manifest package='com.example.nfc_read' android:versionCode='1' android:versionName='1.0' xmlns:android='http://schemas.android.com/apk/res/android'>
    <application android:hardwareAccelerated='true' android:icon='@drawable/ic_launcher' android:label='@string/app_name' android:largeHeap='true'>
        <activity android:label='@string/app_name' android:name='NfcReadActivity'>
            <intent-filter>
                <action android:name='android.intent.action.MAIN'/>
                <category android:name='android.intent.category.LAUNCHER'/>
            </intent-filter>

            <!-- intent-filterの追加 ここから -->
            <intent-filter>
                <action android:name="android.nfc.action.TECH_DISCOVERED"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
            <meta-data android:name="android.nfc.action.TECH_DISCOVERED" android:resource="@xml/nfc_tech_filter"/>
            <!-- intent-filterの追加 ここまで -->
        </activity>

        <activity android:exported='false' android:name='org.ruboto.RubotoActivity'/>
        <activity android:exported='false' android:name='org.ruboto.RubotoDialog' android:theme='@android:style/Theme.Dialog'/>
        <service android:exported='false' android:name='org.ruboto.RubotoService'/>
    </application>
    <uses-sdk android:minSdkVersion='17' android:targetSdkVersion='17'/>

    <!-- permissionの追加 ここから -->
    <uses-permission android:name="android.permission.NFC" />
    <!-- permissionの追加 ここまで -->

    <!-- GooglePlayでの表示の追加 ここから -->
    <uses-feature android:name="android.hardware.nfc" android:required="true" />
    <!-- GooglePlayでの表示の追加 ここまで -->

</manifest>

nfc_read_activity.rb

# encoding: utf-8

require 'ruboto/widget'

ruboto_import_widgets :LinearLayout, :TextView

# NFCまわり
java_import 'android.nfc.NfcAdapter'
java_import 'android.nfc.tech.NfcA'
java_import 'android.nfc.tech.NfcB'
java_import 'android.nfc.tech.NfcF'
java_import 'android.nfc.tech.IsoDep'
java_import 'android.nfc.tech.MifareUltralight'



class NfcReadActivity
  def onCreate(bundle)
    super
    set_title 'NFC Reader Sample'


    intent = getIntent
    case intent.getAction
    when NfcAdapter::ACTION_TECH_DISCOVERED || NfcAdapter::ACTION_TAG_DISCOVERED

      tag = intent.getParcelableExtra(NfcAdapter::EXTRA_TAG)

      view =
        linear_layout orientation: :vertical do
          @idm_view = text_view text: tag.nil? ? 'No IDm' :   to_hex_string(tag.getId),
                                width: :match_parent,
                                gravity: :center,
                                text_size: 48.0

          @tag_info_view = text_view text: tag.nil? ? '' : tag.toString

          # getTechList.joinだとエラーになるため、to_aryを経由する
          @tech_list_view = text_view text: tag.nil? ? '' : tag.getTechList.to_ary.join(',')
        end
      self.content_view = view

       tech_view = create_tech_view(@tech_list_view.text, tag)
       view.addView tech_view unless tech_view.nil?
    end
  end


  def create_tech_view(tech_list, tag)
    view = linear_layout orientation: :vertical do
             @option_view = text_view text: add_delimiter + '以降はNFCタイプごとの項目' + add_delimiter 
           end

    tech_list.split(',').each do |tech|
      # いろいろ簡略化したことによりActivityへ集約するサンプル
      # その分、条件ごとにメソッドを作るという、あまり良くない書き方になってしまった
      case tech
      when 'android.nfc.tech.NfcA'
        tech_view = create_nfca_view(tag)

      when 'android.nfc.tech.NfcB'
        tech_view = create_nfcb_view(tag)

      when 'android.nfc.tech.NfcF'
        tech_view = create_nfcf_view(tag)

      when 'android.nfc.tech.IsoDep'
        tech_view = create_isodep_view(tag)

      when 'android.nfc.tech.MifareUltralight'
        tech_view = create_mifare_ultralight_view(tag)

      else
        next
      end

      view.addView(tech_view)
    end

    view
  end


  def create_nfca_view(tag)
    nfc = NfcA.get(tag)
    view = linear_layout orientation: :vertical do
      @atqa = text_view text: '[NFC-A] atqa: ' + to_hex_string(nfc.getAtqa)
      @sak = text_view text: '[NFC-A] sak: ' + nfc.getSak.to_s
    end
  end


  def create_nfcb_view(tag)
    nfc = NfcB.get(tag)
    view = linear_layout orientation: :vertical do
      @application_data = text_view text: '[NFC-B] application_data: ' + to_hex_string(nfc.getApplicationData)
      @protocol_info = text_view text: '[NFC-B] protocol_info: ' + to_hex_string(nfc.getProtocolInfo)
    end
  end


  def create_nfcf_view(tag)
    nfc = NfcF.get(tag)
    view = linear_layout orientation: :vertical do
      @manufacturer = text_view text: '[NFC-F] manufacturer: ' + to_hex_string(nfc.getManufacturer)
      @system_code = text_view text: '[NFC-F] system_code: ' + to_hex_string(nfc.getSystemCode)
    end
  end


  def create_isodep_view(tag)
    nfc = IsoDep.get(tag)
    view = linear_layout orientation: :vertical do
      @hi_layer_response = text_view text: '[ISO Dep] hi_layer_response: ' + to_hex_string(nfc.getHiLayerResponse)
      @historical_bytes = text_view text: '[ISO Dep] historical_bytes: ' + to_hex_string(nfc.getHistoricalBytes)
    end
  end


  def create_mifare_ultralight_view(tag)
    nfc = MifareUltralight.get(tag)
    view = linear_layout orientation: :vertical do
      @mifare_ultralight = text_view text: '[Mifare Ultralight] mifare_ultralight_type: ' + nfc.getType.to_s
    end
  end


  def to_hex_string(bytes)
    bytes.nil? ? '' : bytes.map{ |byte| "%02X" % (byte & 0xff) }.join
  end


  def add_delimiter
    '-' * 6
  end
end

nfc_tech_filter.xml

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
    <tech-list>
        <tech>android.nfc.tech.IsoDep</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcA</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcB</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcF</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcV</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.Ndef</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NdefFormatable</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.MifareClassic</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.MifareUltralight</tech>
    </tech-list>
</resources>