AndroidAPS/app/src/main/res/layout/food_fragment.xml

<FrameLayout 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"
    tools:context="info.nightscout.androidaps.plugins.treatments.fragments.TreatmentsExtendedBolusesFragment">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

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

            <ImageView
                android:layout_width="wrap_content"
                android:paddingLeft="5dp"
                android:paddingRight="5dp"
                app:srcCompat="@android:drawable/ic_menu_search"
                android:layout_height="wrap_content" />

            <EditText
                android:id="@+id/food_filter"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="text"
                android:text="" />

            <ImageView
                android:id="@+id/food_clearfilter"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:paddingLeft="5dp"
                android:paddingRight="5dp"
                app:srcCompat="@android:drawable/ic_menu_close_clear_cancel" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/category" />

            <Spinner
                android:id="@+id/food_category"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="right"
                android:minWidth="100dp" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/subcategory" />

            <Spinner
                android:id="@+id/food_subcategory"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="right"
                android:minWidth="100dp" />

        </LinearLayout>

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/food_recyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </androidx.recyclerview.widget.RecyclerView>

    </LinearLayout>

</FrameLayout>