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I'm sorry if this question is duplicate, but I have spent a few days finding solution to the problem and couldn't find one, also I can't comment in the existing question so I decided to ask a new one.
When I try to run my app in Android Studio I have this error:

Error:Execution failed for task ':app:validateDebugSigning'. > Unable to recreate missing debug keystore.

As far as I know, the keystore file is located in the folder (user)/.android (I'm using Windows 8.1) but there IS a keystore file in this folder.

WHAT I HAVE TRIED:
- I deleted the old keystore file and tried to create a new one by running the app in Android Stuidio but like the error said, it couldn't create keystore file.
- I managed to create a new keystore file by running the app in Eclipse, this is the ddms.cfg file:

#Thu Jul 16 17:18:42 ICT 2015 pingOptIn=true adtUsed=true pingTime.eclipse=1437041922450 pingTime.adt=1437041922448 pingId=-2893797175409321994

I also checked the permission of the .android folder, all permissions are allowed.
Still, I have the same error when I try to run the app.
Hope someone can help me.
(I know there already is a question with the same title but I couldn't understand the answer, also I can't comment to ask)

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2 Answers 2

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you have to check the permission of .android file by the following commands..

$cd ~ $ls -la

then you will see the file ".android", its permission level.. which user its permitted to if there are more than one users. if such a case then give sudo permission by the required user.. In my case

sudo chmod 777 -R .android
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It's Worked for me.
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You will give sudo chmod -R 777 in .android, see that is a directory not visible located in ~/.

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1. verify that all directory are in ~./bashrc. export PATH=${PATH}:~/Android/Sdk/tools/ export PATH=${PATH}:~/Android/Sdk/platform-tools/ export PATH=${PATH}:~/Android/Sdk/platforms/ export PATH=${PATH}:/opt/android/plugins/android-ndk/ export PATH=${PATH}:/opt/android/plugins/android/lib/ 2. that the sdk of android are update 3. Directory /home/youuser/.android that is not visible also are with permit could not write to the debug file, that file automatically creates android, this is a permissions issue, even have the 755 permission does not work, it should be 777

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