core/res/res/xml/global_keys.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2013, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
-->

<!-- Mapping of keycodes to components which will be handled globally.
     Modify this file to add global keys.
     A global key will NOT go to the foreground application and instead only ever be sent via targeted
     broadcast to the specified component. The action of the intent will be
     android.intent.action.GLOBAL_BUTTON and the KeyEvent will be included in the intent as
     android.intent.extra.KEY_EVENT.
-->

<global_keys version="1">
    <!-- Example format: keyCode = keycode to handle globally. component = component which will handle this key. -->
    <!-- <key keyCode="KEYCODE_VOLUME_UP" component="com.android.example.keys/.VolumeKeyHandler" /> -->
</global_keys>