Android Studio NullPointerException (no error message) after grey screen/restart

Question

I was programming in Android Studio, on MAC OS X macOS Sierra.

I was debugging code on one emulator, then I started next emulator with different phone. Then accidentally laptop restarted (with the grey screen https://i.kinja-img.com/gawker-media/image/upload/s--HPvl05ih--/c_scale,f_auto,fl_progressive,q_80,w_800/18mfougmh04injpg.jpg).

After boot everything come back, Android Studio too. But I can't debug my apps. I have

Error:java.lang.NullPointerException (no error message)

This happening everytime I try to run my app. It is on my company project, from git. I tried different versions of code.

I tried also (with chronology):

reinstall Android Studio
reinstall SDK, Virtual Devices
reinstall Android Studio after completly delete it from Mac, using terminal (How to completely uninstall Android Studio?)
reinstall Java (uninstall with the tip from Java webpage (https://www.java.com/en/download/help/mac_uninstall_java.xml)

I don't know what I can do next besides reinstalling OS.

Thanks

score 1 · Accepted Answer · answered Feb 28 '17 at 07:19

1

Okay.

After that post I also tried cleaning cache, logs and again reinstall Java JDK. Nothing helped.

Unfortunately the only solution which helped - format and reinstall system.

answered Feb 28 '17 at 07:19

Jakub Anioła

score 0 · Answer 2 · answered Feb 27 '17 at 12:19

0

Try File -> Invalidate caches / Restart... in android studio.

answered Feb 27 '17 at 12:19

Ivan Šimović

score 0 · Answer 3 · answered Mar 02 '17 at 16:50

0

you must remove ".gradle" folder into your root project and restart your android studio.

answered Mar 02 '17 at 16:50

ricken_bazolo

Try to explain why he should do that and what it will actually do – Mawcel Mar 02 '17 at 17:02

3 Answers3