android - USB host has confusing documentation -

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i working android host mode usb. in documentation host mode api, manifest requirements suggest using: 

android.hardware.usb.action.usb_device_attached

this causing me confusion usbmanager docs suggest using: 

android.hardware.usb.action.action_usb_device_attached

can explain difference between two?

furthermore, usbmanager (2nd) version not inform app when device attached, host (1st) version does.

i cannot detached intent work using either version:

android.hardware.usb.action.usb_device_detached android.hardware.usb.action.action_usb_device_detached

please advise.

edit

here manifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="cs.android.terminal"     android:versioncode="1"     android:versionname="1.0" >      <uses-sdk android:minsdkversion="12" android:targetsdkversion="15" />       <uses-feature android:name="android.hardware.usb.accessory" />     <uses-feature android:name="android.hardware.usb.host" />       <application         android:icon="@drawable/ic_launcher"         android:label="@string/app_name"         android:theme="@style/apptheme"          >           <activity             android:name=".mainactivity"             android:label="@string/title_activity_main" >             <intent-filter>                 <action android:name="android.intent.action.main" />                                 <category android:name="android.intent.category.launcher" />                 <action android:name="android.hardware.usb.action.usb_device_attached" />                                     <category android:name="android.intent.category.default" />             </intent-filter>              <meta-data android:name="android.hardware.usb.action.usb_device_attached" android:resource="@xml/device_filter" />           </activity>          <receiver                          android:name="cs.android.terminal.terminalreceiver"             android:exported="false"             >            <intent-filter>                   <action android:name="android.hardware.usb.action.usb_device_detached" />                   <category android:name="android.intent.category.default" />                             </intent-filter>         </receiver>      </application>  </manifest>

usb_device_attached used in manifest file detect when device attached usb. action_usb_device_attached used in java code indicate action performed , action is. although there error/bug action_usb_device_attached android not detect broadcastreceiver within java code, can detected within manifest currently. said, use usb_device_attached in manifest.

edit: try this:

 <meta-data android:name="android.hardware.usb.action.usb_device_detached" android:resource="@xml/device_filter" />

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