apps/OboeTester/app/src/main/res/layout/merge_audio_simple.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <com.mobileer.oboetester.StreamConfigurationView
        android:id="@+id/streamConfiguration"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal" />

    <com.mobileer.oboetester.BufferSizeView
        android:id="@+id/buffer_size_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal" />

    <com.mobileer.oboetester.WorkloadView
        android:id="@+id/workload_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/button_start"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:backgroundTint="@xml/button_color_selector"
            android:backgroundTintMode="src_atop"
            android:onClick="startTest"
            android:text="@string/startAudio" />

        <Button
            android:id="@+id/button_stop"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:backgroundTint="@xml/button_color_selector"
            android:backgroundTintMode="src_atop"
            android:onClick="stopTest"
            android:text="@string/stopAudio" />

    </LinearLayout>

</merge>