layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    android:baselineAligned="false"
    android:background="@drawable/background">
    
    <RelativeLayout
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        android:layout_weight="1"
        android:paddingRight="10dp"
        android:padding="1dp">
        
        <ImageView android:id="@+id/h1_8" 
            android:layout_height="@dimen/square"
            android:layout_width="@dimen/square"
            android:layout_alignParentTop="true"
            android:layout_alignParentLeft="true"
            android:contentDescription="@string/empty" />
        <ImageView android:id="@+id/h1_4" 
            android:layout_height="@dimen/square"
            android:layout_width="@dimen/square"
            android:layout_below="@id/h1_8"
            android:contentDescription="@string/empty" />
                
        <ImageView android:id="@+id/h0_8"
            android:layout_width="@dimen/square"
            android:layout_height="@dimen/square"
            android:layout_alignParentTop="true"
            android:layout_alignParentRight="true"
            android:contentDescription="@string/on"
            android:src="@drawable/on_blue" />
        <ImageView android:id="@+id/h0_4"
            android:layout_width="@dimen/square"
            android:layout_height="@dimen/square"
            android:layout_marginTop="@dimen/spacing"
            android:layout_alignParentRight="true"
            android:layout_below="@id/h0_8"
            android:contentDescription="@string/on"
            android:src="@drawable/on_blue" />
        
        <ImageView android:id="@+id/h1_1"
            android:layout_width="@dimen/square"
            android:layout_height="@dimen/square"
            android:layout_alignParentBottom="true"
            android:layout_alignParentLeft="true"
            android:contentDescription="@string/on"
            android:src="@drawable/off_gray" />
        <ImageView android:id="@+id/h1_2"
            android:layout_width="@dimen/square"
            android:layout_height="@dimen/square"
            android:layout_marginBottom="@dimen/spacing"
            android:layout_alignParentLeft="true"
            android:layout_above="@id/h1_1"
            android:contentDescription="@string/on"
            android:src="@drawable/off_gray" />
        
        <ImageView android:id="@+id/h0_1"
            android:layout_width="@dimen/square"
            android:layout_height="@dimen/square"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            android:contentDescription="@string/on"
            android:src="@drawable/off_gray" />
        <ImageView android:id="@+id/h0_2"
            android:layout_width="@dimen/square"
            android:layout_height="@dimen/square"
            android:layout_marginBottom="@dimen/spacing"
            android:layout_alignParentRight="true"
            android:layout_above="@id/h1_1"
            android:contentDescription="@string/on"
            android:src="@drawable/off_gray" />
                
    </RelativeLayout>
    
    <RelativeLayout
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        android:layout_weight="1"
        android:background="#0f0"> 
               
    </RelativeLayout>
    
    <RelativeLayout
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        android:layout_weight="1"
        android:background="#00f">
                
    </RelativeLayout>

</LinearLayout>