I have declared a long string in string.xml of an application.
Declared like this
PLEASE READ THESE TERMS
post your complete string. Though, my guess is there is an apostrophe (') character in your string. replace it with (\') and it will fix the issue. for example,
//strings.xml
Hey Mr. Android, are you stuck? Here, I\'ll clear a path for you.
Ref:
http://www.mrexcel.com/forum/showthread.php?t=195353
https://code.google.com/archive/p/replicaisland/issues/48