Android Studio Suddenly started to display unable to resolve com.android.support…25.0.0 error messages and all of my java files are erroneous now?

Question

My project was working very fine, but until one day, when I uploaded my project to github. I don\'t know if this issue is related to that but today when I compiled my androi

Answer 1

Just updating the Android support repository version to 25 did my work. Thanks to all of you for the guidance!