Androidstudio Doesn't Create R.java?

I'm using Android Studio v0.2.6 and I don't know why, but there is no R.java file created in my project. Therefore the autocomplete-thing tries to import android.R and everything i

Solution 1:

I've had a similar issue - make sure your src, gen and libs folders are set as source folder in the Project Structure dialog. ( Open Project Structure -> Modules -> YourApp -> Sources. Ctrl click src and gen and click Sources above )