Now, there is no option on android electrictrum to save as a file. I can copy the text and put it in a txt file but what should I name the extention and will it work if imported as a file.
You can save the copied text to a txt file or none, the important thing is the contents.
And send it to your offline Electrum, open the file as text and copy its contents.
Is the offline Electrum also Android?
If so, you can import it via "
Send->Paste", then you can proceed to sign and broadcast the transaction.
If Desktop, use "
Tools->Load transaction->from text".