Android v7 Toolbar button alignment

You should add android:layout_gravity="end" for your Button :

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:id="@+id/showevents"
        android:textSize="12sp"
        android:background="@null"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:textColor="#FFF"
        android:text="UPCOMING \nEVENTS"/>