CustomView.xml

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

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

        <android.support.v7.widget.SwitchCompat
            android:id="@+id/layer_switch"
            android:layout_alignParentRight="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <TextView
            android:id="@+id/layer_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_toLeftOf="@id/layer_switch"
            android:layout_centerVertical="true"
            android:text="Layer Name"
            style="@style/sidebar_switch_style"
            />

    </RelativeLayout>

    <!-- I intent to make this LinearLayout to expand when clicked in above RelativeLayout --> 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:background="@android:color/darker_gray"
        >

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Heat"
            />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Cluster"
            />



    </LinearLayout>

</LinearLayout>