My Layout file

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/mainView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/Phoenix_Black"  >
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rvPoList"
        android:layout_width="130dp"
        android:layout_height="match_parent"
        android:background="@color/Phoenix_Black"
        android:orientation="horizontal" />
    <RelativeLayout
        android:id="@+id/llPurchaseOrder"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_toEndOf="@id/rvPoList"
        android:layout_toStartOf="@id/btnReceive"
        android:layout_marginEnd="@dimen/dp5"
        android:background="@color/Phoenix_White"
        android:orientation="horizontal">
        <RelativeLayout
            android:id="@+id/trPurchaseOrderInfo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >
            <TextView
                android:id="@+id/tvPurchaseOrder"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:fontFamily="@font/okuda"
                android:text="@string/purchase_order"
                android:textSize="@dimen/sp24"
                android:paddingStart="@dimen/dp5"
                android:paddingEnd="@dimen/dp5" />
            <TextView
                android:id="@+id/tvPurchaseOrderDate"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:fontFamily="@font/okuda"
                android:text="@string/purchase_order_date"
                android:textSize="@dimen/sp24"
                android:paddingStart="@dimen/dp5"
                android:paddingEnd="@dimen/dp5"
                tools:ignore="RelativeOverlap" />
        </RelativeLayout>
        <RelativeLayout
            android:id="@+id/rlTableHeader"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/trPurchaseOrderInfo">
            <TextView
                android:id="@+id/tvLineNumber"
                android:layout_width="@dimen/dp100"
                android:layout_height="wrap_content"
                android:fontFamily="@font/okuda"
                android:textSize="@dimen/sp24"
                android:gravity="center"
                android:background="@drawable/x_border_1"
                android:text="@string/line" />
            <TextView
                android:id="@+id/tvLineItem"
                android:layout_width="@dimen/dp100"
                android:layout_height="wrap_content"
                android:layout_toEndOf="@id/tvLineNumber"
                android:layout_toStartOf="@id/tvLineOrdered"
                android:fontFamily="@font/okuda"
                android:textSize="@dimen/sp24"
                android:gravity="center"
                android:background="@drawable/x_border_1"
                android:text="@string/item"  />
            <TextView
                android:id="@+id/tvLineOrdered"
                android:layout_width="@dimen/dp100"
                android:layout_height="wrap_content"
                android:layout_toStartOf="@id/tvLineRecieved"
                android:fontFamily="@font/okuda"
                android:textSize="@dimen/sp24"
                android:gravity="center"
                android:background="@drawable/x_border_1"
                android:text="@string/ordered"  />
            <TextView
                android:id="@+id/tvLineRecieved"
                android:layout_width="@dimen/dp100"
                android:layout_height="wrap_content"
                android:layout_toStartOf="@id/tvLineOutstanding"
                android:fontFamily="@font/okuda"
                android:textSize="@dimen/sp24"
                android:gravity="center"
                android:background="@drawable/x_border_1"
                android:text="@string/received"  />
            <TextView
                android:id="@+id/tvLineOutstanding"
                android:layout_width="@dimen/dp100"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:fontFamily="@font/okuda"
                android:textSize="@dimen/sp24"
                android:gravity="center"
                android:background="@drawable/x_border_1"
                android:text="@string/outstanding"  />
        </RelativeLayout>
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rvPlList"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/rlTableHeader"
            android:background="@color/Phoenix_White"
            android:orientation="horizontal" />
    </RelativeLayout>
<!--    <ScrollView
        android:id="@+id/scrollView"
        android:layout_width="wrap_content"
        android:layout_height="275dp"
        android:layout_alignParentStart="true"
        android:layout_toEndOf="@id/llPurchaseOrder">-->
        <RelativeLayout
            android:id="@+id/relativeviewButtons"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
                android:id="@+id/buttonAdd1"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_alignParentTop="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num1"
                android:textSize="@dimen/sp24"
                android:layout_toStartOf="@id/buttonMinus1"
                android:background="@drawable/x_add_button" />
            <Button
                android:id="@+id/buttonMinus1"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_alignParentTop="true"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num1"
                android:textSize="@dimen/sp24"
                android:background="@drawable/x_minus_button" />
            <Button
                android:id="@+id/buttonAdd2"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonAdd1"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num2"
                android:textSize="@dimen/sp24"
                android:layout_toStartOf="@id/buttonMinus2"
                android:background="@drawable/x_add_button" />
            <Button
                android:id="@+id/buttonMinus2"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonMinus1"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num2"
                android:textSize="@dimen/sp24"
                android:background="@drawable/x_minus_button" />
            <Button
                android:id="@+id/buttonAdd4"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonAdd2"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num4"
                android:textSize="@dimen/sp24"
                android:layout_toStartOf="@id/buttonMinus4"
                android:background="@drawable/x_add_button" />
            <Button
                android:id="@+id/buttonMinus4"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonMinus2"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num4"
                android:textSize="@dimen/sp24"
                android:background="@drawable/x_minus_button" />
            <Button
                android:id="@+id/buttonAdd8"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonAdd4"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num8"
                android:textSize="@dimen/sp24"
                android:layout_toStartOf="@id/buttonMinus8"
                android:background="@drawable/x_add_button" />
            <Button
                android:id="@+id/buttonMinus8"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonMinus4"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num8"
                android:textSize="@dimen/sp24"
                android:background="@drawable/x_minus_button" />
            <Button
                android:id="@+id/buttonAdd16"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonAdd8"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num16"
                android:textSize="@dimen/sp24"
                android:layout_toStartOf="@id/buttonMinus8"
                android:background="@drawable/x_add_button" />
            <Button
                android:id="@+id/buttonMinus16"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonMinus8"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num16"
                android:textSize="@dimen/sp24"
                android:background="@drawable/x_minus_button" />
            <Button
                android:id="@+id/buttonAdd32"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonAdd16"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num32"
                android:textSize="@dimen/sp24"
                android:layout_toStartOf="@id/buttonMinus32"
                android:background="@drawable/x_add_button" />
            <Button
                android:id="@+id/buttonMinus32"
                android:layout_width="@dimen/dp62"
                android:layout_height="wrap_content"
                android:layout_below="@id/buttonMinus16"
                android:layout_alignParentEnd="true"
                android:layout_marginTop="@dimen/dp5"
                android:layout_marginEnd="@dimen/dp5"
                android:paddingTop="@dimen/dp60"
                android:enabled="false"
                android:fontFamily="@font/okuda"
                android:text="@string/num32"
                android:textSize="@dimen/sp24"
                android:background="@drawable/x_minus_button" />
        </RelativeLayout>
<!--    </ScrollView>-->
    <Button
        android:id="@+id/btnReceive"
        android:layout_width="@dimen/dp129"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_above="@id/btnExit"
        android:layout_marginEnd="@dimen/dp5"
        android:layout_marginBottom="@dimen/dp5"
        android:background="@drawable/x_red_button"
        android:enabled="false"
        android:fontFamily="@font/okuda"
        android:paddingTop="@dimen/dp60"
        android:text="@string/receive"
        android:textSize="@dimen/sp24"
        android:textColor="#000000" />
    <Button
        android:id="@+id/btnExit"
        android:layout_width="129dp"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentBottom="true"
        android:layout_marginEnd="@dimen/dp5"
        android:layout_marginBottom="@dimen/dp5"
        android:background="@drawable/x_green_button"
        android:fontFamily="@font/okuda"
        android:paddingTop="@dimen/dp60"
        android:text="@string/exit"
        android:textColor="#000000"
        android:textSize="@dimen/sp24" />
</RelativeLayout>