Android App Not Install An existing package by the same name with a conflicting signature is already installed

Question

In my emulator  when I try to do an upgrade of my apk programmatically  I get   Android App Not Install   An existing package by the same name with a conflicting signature is already installed    I m still in the testing phase of this upgrade  so the file I download is a signed apk of a previous version  which I think should work without any issues    From the suggestion in  an existing package by the same name with a confilcting signature is already installed I tried to run the emulator both in debug mode and in normal mode    neither worked    Any thoughts on what I m missing

User · Answer

There is a difference between signed and unsigned APK files  Most likely you had an unsigned on there previously  You just need to delete the unsigned before you install the signed version  How this can be accomplished varies on the exact version  but in general  go on the emulator to settings-  application  long click your app  and delete remove uninstall it

User · Answer

Go to Settings  gt  Apps  find and open the app info  Then  open the overflow menu  3 vertical dots   and choose Uninstall for all users      Go to Settings   Apps  find and open the app info  Then  open the overflow menu  3 vertical dots   and choose Uninstall for all users

User · Answer

If above solutions did not work for you then you may have doing something as following     1  installing the app from Appstore  2  updating it with sign APK with same package name updated version    So basically there are two kinds if APK s   1  you uploaded on playstore known as original APK  2  download from playstore known as derived APK   In this case basically you are downloading derived apk and updating it with original APK   For let it work fine uploaded new signed released APK in the internal test mode on the Google Play Store and download the derived APK to check the update scenario

User · Answer

I had an issue where both debug and release build won t install on devices I used for debugging  The same msg would appear when trying to install the new version  The only workaround was to uninstall the current version and install the new one   It looks like Android studio marks the apk it installs so that installation using the package managers would distinguish between version installed for debugging and versions downloaded from Google play or other external sources  this never happened to me when using eclipse

User · Answer

It may be application is not uninstall successful  If your device is this case  you can try this method    First get the package name of the application  e g  com xxx app   you can use Root Explorer and find it from Manifest file RE can decode the file   then you can use this script to uninstall it   adb shell pm uninstall com xxx app    replace to package name that you want to remove

User · Answer

I had to login as the owner and go to Settings -  Apps  then swipe to the All tab  Scroll down to the very end of the list where the old versions are listed with a mark  not installed   Select it and press the  settings  button in the top right corner and finally  uninstall for all users

User · Answer

Same package error    Create a new Package in your app with different name  Copy and paste all file in your old package to new Package  Save Code  Delete old Package And Clean and rebuild project

User · Answer

If you are using the debug apk  the key that is used to sign it is in   C  Users  lt user gt   android debug keystore   If you use that same key  there should not be a conflict when installing

User · Answer

I had the same error message  but these answers did not help  On a 4 3 nexus 7  I was using a user who was NOT the owner  I had uninstalled the older version but I kept getting the same message   Solution  I had to login as the owner and go to Settings -  Apps  then swipe to the All tab  Scroll down to the very end of the list where the old versions are listed with a mark  not installed   Select it and press the  settings  button in the top right corner and finally  uninstall for all users

User · Answer

There may be another reason when your application will not update when you either change add remove shareId in AndroidManifiest    android sharedUserId   Please check that also    To prevent would recommend to use sharedUserId in your application despite in your current requirement you need or now

User · Answer

If you use multiple users at android  verify that the app is uninstalled everywhere

User · Answer

I tried all the above and it did not work   I found that in spite of uninstalling the app a new version of the app still gives the same error   This is what solved it  go to Settings -  General -  application Manager -  choose your app -  click on the three dots on the top -  uninstall for all users   Once you do this  now it is actually uninstalled and will now allow your new version to install   Hope this helps

User · Answer

The problem is the keys that have been used to sign the APKs  by default if you are running directly from your IDE and opening your Emulator  the APK installed in the Emulator is signed with your debug-key usually installed in    android debug keystore   so if the previous APK was signed with a different key other than the one you are currently using you will always get the signatures conflict  in order to fix it  make sure you are using the very same key to sign both APKs  even if the previous APK was signed with a debug-key from another SDK  the keys will definitely be different   Also if you don t know exactly what key was used before to sign the apk and yet you want to install the new version of your app  you can just uninstall the previous application and reinstall the new one   Hope this Helps     Regards

User · Answer

If you don t want to bother with the keystore file  then just remove the package altogether for all users   Connect your device with Mac PC and run adb uninstall  lt package gt   Worked for me   Ref  https   android stackexchange com questions 92025 how-to-completely-uninstall-an-app-on-android-lollipop

[android] Android App Not Install. An existing package by the same name with a conflicting signature is already installed

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