I want to find all hard-coded strings in my code to move them into strings.xml file for future localization. Such as :
Toast.ma
It seems it has been already answered here, isn't it relevant for your problem ?
Edit : just don't forget to check "File mask(s)" box in the window after having typed "Hardcoded text", and select *.java, if you want to search in Java files.
And after you found all your hardcoded strings, this may help you to transfer them to XML.