app_bar_home.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.cortana.shopv3.HomeActivity">


    <android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay"
        android:weightSum="1">

            <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            app:srcCompat="@android:drawable/ic_menu_sort_by_size"
            android:layout_marginLeft="100sp"
            android:background="@null"
            android:adjustViewBounds="true"
            android:cropToPadding="true" />

            <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            app:srcCompat="@android:drawable/btn_plus"
            android:layout_marginLeft="15sp"
            android:background="@null"
            android:adjustViewBounds="true"
            android:cropToPadding="true" />

        <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:srcCompat="@android:drawable/ic_menu_save"
        android:id="@+id/CartBtn"
        android:background="@drawable/refreshgreen"
        android:adjustViewBounds="true"
        android:layout_marginLeft="15sp"
        android:layout_alignParentTop="true"
        android:layout_marginBottom="15sp"
        android:layout_toRightOf="@+id/SearchBox"
        android:layout_toEndOf="@+id/SearchBox"
        android:cropToPadding="true" />


    </android.support.v7.widget.Toolbar>

</android.support.design.widget.AppBarLayout>