samples/drumthumper/src/main/res/layout/drumthumper_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:context=".DrumThumperActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="DrumThumper"
        android:textSize="22pt" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="128dp"
        android:orientation="horizontal">

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/kickPad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Kick" />

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/snarePad"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Snare" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="128dp"
        android:orientation="horizontal">

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/hihatOpenPad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Open Hat" />

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/hihatClosedPad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Closed Hat" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="128dp"
        android:orientation="horizontal">

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/midTomPad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Mid Tom" />

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/lowTomPad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Low Tom" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="128dp"
        android:orientation="horizontal">

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/ridePad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Ride" />

        <com.google.oboe.sample.drumthumper.TriggerPad
            android:id="@+id/crashPad"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="5dp"
            android:text="Crash" />
    </LinearLayout>


</LinearLayout>