Try the following:
<string name="sent_from">\n\nSent from my wonderful Android device</string>
I think that is what you are looking for.
Вопрос
I am trying to store two carriage returns in in strings.xml but can't figure out why they are ignored. However, if I put them directly into the layout, the carriage returns work fine.
Outputs carriage returns
android:text="

Sent from my wonderful Android device"
Does not output carriage returns
<string name="sent_from">

Sent from my wonderful Android device</string>
Решение
Try the following:
<string name="sent_from">\n\nSent from my wonderful Android device</string>
I think that is what you are looking for.