Android Studio - "Unmappable character for encoding UTF-8"

Question

All was working fine and dandy with Eclipse in Windows until I switched to Mac OS X Yosemite, using Android Studio V1.0. I imported the project as a Non-Android Studio project since it was created with Eclipse, the import went fine and then Android Studio started showing this error all over the files :

error : unmappable character for encoding UTF-8

EDIT: Opening files directly into Sublime Text show no errors in foreign characters. Using view.encoding() inside ST's console I was able to see the file encoding, which was Western (Windows 1252). I went to Android Studio and changed the encoding of the file to windows-1252 and it's now working fine !
Is there a way to tell Android Studio to read the files in windows-1252 and then convert them to UTF-8 to keep the standard encoding format ?

Answer 1

Adding the following to build.gradle solves the problem :

android {
    ...
    compileOptions.encoding = 'ISO-8859-1'

Answer 2

I have encountered this problem, too. The reason for my problem is that I copy a file which is not encoded UTF-8 from Eclipse to Android Studio. A solution to this problem is that:

1. Make sure the default file encoding of your Android Studio is UTF-8: Settings --> File Encodings, set IDE Encoding, Project Encoding and Default encoding for properties files to UTF-8.
2. Copy your error file to a txt file and delete the error file.
3. Create a new file, its name is as the same as the deleted file.
4. Copy the content from the txt file to the new file.