arduino2.java

<!-- For Arduino. -->
<uses-feature android:name="android.hardware.usb.host" />

<application
  android:name=".HackathonApplication"
  android:allowBackup="true"
  android:icon="@mipmap/ic_launcher"
  android:label="@string/app_name"
  android:theme="@style/Theme.AppCompat" >
  <activity
    android:name=".Activity_Main"
    android:label="@string/app_name" >
    
    <intent-filter>
      <action android:name="android.intent.action.MAIN" />
      <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>

    <!-- For Arduino. -->
    
    <intent-filter>
      <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
    </intent-filter>
    
    <meta-data
      android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
      android:resource="@xml/arduino_filter" />
    
    <intent-filter>
      <action android:name="android.hardware.usb.action.USB_DEVICE_DETACHED" />
    </intent-filter>

</activity>