I\'m a bit of an Android rookie, and I just upgraded to Android Studio 1.2. When I make a new project (API 16: Android 4.1 (Jelly Bean)), I immediately get the following war
I am or was having the same problem. So I changed it so that the IDE and project encodings and the default encoding for properties files were all UTF-8. But I kept seeing the same warning in the gradle sync tab of the messages. Then eventually I simply closed that tab, and have not seen the warning message since. Presumably the IDE would reraise that tab if the warning condition again applied. Now when I make the project, neither the gradle sync tab nor the warning message appear. So maybe the warning was written appropriately during one make, but should have been cleared or somehow removed at the start of a new make, but wasn't, meaning that it is a bug in the IDE.
But every time I create a new project, the problem comes up again. There ought to be a setting to cause all the encodings to match every time a new project is created.