res/layout/recognizer_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2012 Google Inc. All Rights Reserved. -->
<!-- Inline keyboard layout chrome, which includes the backspace and mode switcher buttons -->
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:recognizer="http://schemas.android.com/apk/res-auto"
    android:layout_width="96dp"
    android:layout_height="96dp"
    android:gravity="center"
    android:keepScreenOn="true"
    android:orientation="vertical" >

    <com.android.inputmethod.leanback.voice.BitmapSoundLevelView
        android:id="@+id/microphone"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        recognizer:disabledBackgroundColor="@android:color/transparent"
        recognizer:enabledBackgroundColor="@android:color/transparent"
        recognizer:minLevelRadius="28dip"
        recognizer:primaryLevels="?soundPrimaryLevel"
        recognizer:trailLevels="?soundTrailLevel" />

    <ImageView
        android:id="@+id/recognizer_mic_button"
        android:layout_width="@dimen/action_button_size"
        android:layout_height="@dimen/action_button_size"
        android:layout_gravity="center"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:scaleType="fitXY"
        android:src="@drawable/ic_voice_available" >

        <requestFocus />
    </ImageView>

</merge>