What's The matter
I built a debug APK and share it to client by downloadable link. Few days back, I formatted my PC. Now again I gave an update to client for existing APK. When client tries to update (without uninstalling older one), app shows Android App Not Install.
I would like to know, do the Signature of APK before and after formatting PC will be different?
If 'YES',
What are the possible solutions for updating newer APK on
older(installed) one?
If 'NO',
Why I am getting, Android App Not Install. An existing package by the
same name with a conflicting signature is already installed
I would like to know, do the Signature of APK before and after
formatting PC will be different?
Yes, if you are using default debug keystore. This is normally the case if you are building your apk through Android Studio. This keystore will be deleted after you have formatted the PC. A new keystore will be created after you install the Android-Studio
No, if you maintain your keystore seprately and use it consistantly to sign your app before release
Solutions
If you have used debug keystore then only solution is to uninstall your previous app and install a new one
If you have just missed the signing configuration, then simply create a new APK signed with correct keystore.
Checkout my answer in this post if you want to ensure that in future, all your dev workstation should produce debug apps signed with same keystore, even if you format your PC.
Related
I've changed my pc and reinstalled Android Studio as well as my old project.
I've copied my old keystore files in the following directory
"C:\Users\MyUserName.android"
But when I run the program it looks like the keystore is not recognized(not connecting to google services and so forth...)
How do I check if my keystore file is working properly?
There are two keystore files usually used. One for debugging and one for doing release builds of your apps you plan to upload to an app store. The debugging keystores can be generated anytime, so, it doesn't hurt to create a new one in your new IDE setup. But for your release keystore, you will want to build a new version release of your app and export it, then try to upload it to your App Store. If there is anything wrong with the signing, the App Store should reject it.
Just try to generate signed apk . If you got error than you keystore is not setup. If it generate then it's okk.
I created an app on my Windows PC and from that PC I published the app to the Google Play Store. I have migrated(transferred via external hard drive) all my projects from my PC to my Mac.
I am now wondering will compiling that same app on the Mac cause it to create a new certificate?
The reason I would like to know is because I want to publish an update and would prefer to work on the project on the Mac but I don't want a problem to occur, that when I decide to publish the app from the Mac the Play Store will see a different certificate and the app will be published as if it were a totally brand new APK.
No, it is not computer-dependent.
Make sure you copy the Keystore you've been using to sign it from your old computer to the new one and everything will be exactly the same.
The Keystore is (just) the file in which all your keys are saved (and usually has a .jks extension).
The main documentation states:
A keystore is a binary file that contains a set of private keys. You
must keep your keystore in a safe and secure place.
A private key represents the entity to be identified with the app,
such as a person or a company.
So as long as you are identified with the same private key (located in your keystore), you will be fine.
Every installation of Android Studio has it's own debug signing key which is used to install apps on your device. However, when you sign an app for distribution on Google Play, you're supposed to use a separate keystore that you've generated and password protected. The overview of this process is here: http://developer.android.com/tools/publishing/app-signing.html
The good news is, you can then move that release keystore to any computer you want and use it to sign release builds for the Play Store.
If you copy the signing certificate you used on the first machine to the second machine, there will be no problem. The build and sign process should be platform agnostic (unless your build code makes assumptions about the host platform).
By default it will use a different debug certificate on every machine. You should explicitly create and use a non-debug key for publication. You may not want to check the signing key into source control, so you'll have to copy it to other computers manually.
I upgraded my Android studio to 1.4. Now when I'm deploying my app to my device I get the message that the device has an application with the same package but a different signature. How is this possible? I already did some research and I looked up my debug.keystore, but this hasn't changed since 13/03/2015. Anyone has any idea how I can fix this?
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.
for more info go through This
Hope this Helps...
Debug builds are signed with the SDK keystore which is generated when you install the Android SDK. On Linux / OSX it is located at ~/.android/debug.keystore.
The message you had means that you have a debug build installed and you want to install an App Store build on it (or the other way around).
This can also happen when you deploy from a different machine.
i'm new to android development i have developed one application and distribute a copy from bin folder not in playstore . The user try to install app second time with different version it's giving "APP not installed an existing package by the same name with a conflicting signature is already installed" like this but same version it's not coming like this.
I want to install app without uninstalling(means user don't want to do uninstall) previous one without using play store and one more doubt when this signature will generates .
Thanks in Advance.
See what happens: most probably you'd compiled a DEBUG version of app and distributed it your own way. At that time your IDE used a debug certificate which is auto created every time you install IDE/SDK. Now, some time has passed and you'd switched your working PC/notebook OR you'd reinstalled the IDE/SDK OR you'd switched lets say from Eclipse to AndroidStudio OR changed your OS from Win7 to Win8 or Ubuntu, no matter what you did but as a result the brand NEW debug certificate was generated and used now. And most probably you'd lost your previous debug certificate 4ever (depends how this happens).
The certificate itself stands for a unique fingerprint and each debug or release certificate has its own unique fingerprint. That fingerprint is the signature Android talking about. Every apk is signed using certificate and has its signature, its mandatory.
So, since you are using a different debug key store certificate you are NOT ABLE to do what you want. The right scenario is to create a release certificate (key store) and to sign you app with it and then distribute app any way you want. This way you should also save your release certificate and reuse it later to sign any upcoming updates.
As for now you should restore your certificate you'd signed your apk with or the only way your users has now is to uninstall and then install.
Harsha Vardhan is right, You should first clean project and then use same signature with installed apk.
what ever you said it's correct but the problem here is i have changed sdk because of this problem is occurred . I think solution is need to generate apk file from same sdk .
I am not sure why that just happened.
But that's happened to me one time also.
I've changed my package name from com.aashakil.myapp to com.myapp and it was fixed.
If you change yours it'll may work.
I've moved my workspace and successfully managed to get it to work on Linux (Ubuntu 11.04) my problem lays on the fact that I can't remember how I did this when I did it for my mac. I'm getting the "Re-installation failed due to different application signatures." error since I don't have the signature in Linux.
My question would be, how to move the application signature from windows to linux.
Thanks in advance.
Do you mean the Debug or the Release keystore?
You used the release keystore to sign your app before uploading it to the Android Market. So to upgrade this same app later you need that same keystore file. Without this keystore you're lost and you need to upload a newer release with a new packagename and signature.
If you are talking about the Debug key - it must be somewhere in your users environment. You can see the default location in Eclipse (Window/Preferences/Android/Build).