Because I always forget how to place a field at the beginning of a line and one opposite at the end, I create this post…
The easiest way to do this is using a Flex Box and the property justifyContent like in this sample: https://sapui5.hana.ondemand.com/#/entity/sap.m.FlexBox/sample/sap.m.sample.FlexBoxOpposingAlignment
<FlexBox alignItems="Center" width="100%" justifyContent="SpaceBetween">
<Text text="Text1" textAlign="Begin"/>
<Text text="Text2" textAlign="End"/>
</FlexBox>
Another way is a using a Toolbar and a ToolbarSpacer. But of course a Toolbar should only be used, when it makes sense to use a Toolbar.
<Toolbar>
<Text text="Text1" textAlign="Begin"/>
<ToolbarSpacer/>
<Text text="Text2" textAlign="End"/>
</Toolbar>