Failure INSTALL FAILED ALREADY EXISTS when I tried to update my application

Question

when I tried to update my applcation with new version that has same signature as previous one  shows above error   What I am missing

User · Accepted Answer

If you install the application on your device via adb install you should look for the reinstall option which should be -r  So if you do adb install -r you should be able to install without uninstalling before

User · Answer

It might mean the application is already installed for another user on your device  Users share applications  I don t know why they do but they do  So if one user updates an application is updated for the other user also  If you uninstall on one  it doesn t remove the app from the system on the other

User · Answer

To Install adb install -r exampleApp apk   The -r makes it replace the existing copy  add an -s if installing on an emulator  Make sure the app is signed the same and is the same debug release variant Bonus I set up an alias in my    bash profile  to make it a 2char command  alias bi  quot gradlew  amp  amp  adb install -r exampleApp apk quot    Short for Build and Install

User · Answer

This can also be caused if the application was built from different PCs   You can make it easier for your whole team if you copy a debug keystore from someone s machine into a  cert folder at the top of your project and then add a signingConfigs section to your app build gradle    signingConfigs       debug         storeFile file  quot cert debug keystore quot              Then tell your debug build how to sign the application    buildTypes       debug            Other values        signingConfig signingConfigs debug            Check this file into source control  This will allow for the seamless install upgrade process across your entire development team and will make your project resilient against future machine upgrades too

User · Answer

With my Android 5 tablet  every time I attempt to use adb  to install a signed release apk  I get the  INSTALL FAILED ALREADY EXISTS  error   I have to uninstall the debug package first  But  I cannot uninstall using the device s Application Manager   If do uninstall the debug version with the Application Manager  then I have to re-run the debug build variant from Android Studio  then uninstall it using adb uninstall com example mypackagename  Finally  I can use adb install myApp apk to install the signed release apk

User · Answer

If u still facing problem then try to uninstall application using command prompt  just add command adb uninstall com example yourpackagename then try to re-install again It works

User · Answer

You are getting that error because an application with a package name same as your application already exists  If you are sure that you have not installed the same application before  change the package name and try   Else wise  here is what you can do    Uninstall the application from the device  Go to Settings -  Manage Applications and choose Uninstall OR Uninstall the app using adb command line interface  type adb uninstall  After you are done with this step  try installing the application again

[android] Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application

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