Android Studio: Installation failed since APK was not signed
This happens often when you install the same app generated on a different computer. Even the unsigned apk has a signature, so your phone is confused why you're trying to install something with the same package name that was generated on a different computer.
Go to your settings -> apps, then find the app in the list, and clear its data and uninstall it.
Then try installing again. That'll fix it.
This problem can be resolved by below two ways
- Change Built Variant to debug
- Define your application`s signingConfigs
First solution works when you built your application in debug mode. But, once you are ready to publish your application on Google Play store you need to go by second way.
Read for more -> Sign Your App
Hope this will help one and all!
I had this same problem occur last night. Running in debug, in my case the app had previously been installed from weeks ago, and I had deleted it, but I was still getting the error and couldn't install it again. I was able to resolve it by going into the AVD manager and wiping user data from there. After that installation and debugging went fine.