Android studio unexpected lock file protocol

Question

Am trying to import an android studio project into a new machine. The import goes on fine and the directories of the project are displayed correctly.However, when i try to build or clean the project, android studio raises the following error

Gradle 'ngoma' project refresh failed
Error:Unexpected lock protocol found in lock file. Expected 3, found 0.

I have tried closing and reopening the project, changing the permissions of the folder containing the projects but nothing is changing. How can I solve this error??

See http://stackoverflow.com/questions/23196254/how-to-start-develop-application-for-fire-os-in-android-studio-ide — Scott Barta, Dec 15 '14 at 18:07
Does this answer your question? [Error:Unexpected lock protocol found in lock file. Expected 3, found 0](https://stackoverflow.com/questions/31743942/errorunexpected-lock-protocol-found-in-lock-file-expected-3-found-0) — Athafoud, Dec 08 '19 at 19:40

score 22 · Accepted Answer · answered Jul 01 '15 at 07:47

22

Go into your local file project and search for the ".gradle" folder

Erase it and restart your IDE.

answered Jul 01 '15 at 07:47

1020rpz

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1

Worked for me! nice and easy :) – Lettings Mall Sep 13 '15 at 18:25
3

For me, I delete `~/.gradle/caches/2.8/`, then it works. (2.8 is gradle version that used in the project). In my situation, it's a fresh project without a ".gradle" folder in project root directory, so you may delete project-level ".gradle" folder as well. – Weekend Feb 18 '16 at 05:45

score 5 · Answer 2 · answered Feb 01 '16 at 08:59

5

Removing the contents from .gradle folder in home folder and restarting Android Studio resolved the issue. Please note I earlier removed the contents from .gradle folder from Android Project folder, but this did not help.

answered Feb 01 '16 at 08:59

Lalit Rane

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score 3 · Answer 3 · edited Feb 10 '19 at 13:27

3

I had this problem and deleting the project's .gradle folder didn't fix the problem.

I solved the problem by deleting the C:\Users\<username>\.gradle folder and restarting my IDE.

edited Feb 10 '19 at 13:27

Zoe

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answered Aug 27 '16 at 09:28

Vipul jain

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score 1 · Answer 4 · answered Jan 04 '15 at 02:02

1

The SDK library is no specified, try to set it on configuration

answered Jan 04 '15 at 02:02

Sergio Lopez Loya

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score 1 · Answer 5 · edited Jul 01 '21 at 01:23

I've tried several solution:

First Solution: Go to File -> Invalid Caches, Restart.
Second Solution: First, Build -> Clean Project and then Build -> Rebuild Project
Third Solution: First, close the project and remove from workspace of Android Studio, then go to C:\Users\user\.gradle then delete .gradle folder. After that, open the project again.

But none of these worked. Then I found a solution. In my case, the problem was with the Gradle version. Check your Gradle version in File -> Project Structure (Ctrl+Alt+Shift+S) and the Plugin version as well:

In my case, the problem was in gradle version. Check your Gradle version File -> Project Structure(Ctrl+Alt+Shift+S) and Plugin version also.

score 0 · Answer 6 · answered May 10 '17 at 14:29

0

i fixed my issue by invalidating caches, go to file -> invalidate caches / restart

answered May 10 '17 at 14:29

Muhammad Yawar

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score -1 · Answer 7 · answered May 24 '16 at 08:49

-1

It is also enough to delete only all *.lock files in ~/.gradle folder

answered May 24 '16 at 08:49

andrey

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Android studio unexpected lock file protocol

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