android – Can not install my own generated apk-ThrowExceptions

Exception or error:

I updated my app and tested it on my device. Everything works fine if I test the app via the run button in eclipse but if I export it into an apk and try to install the apk it fails.

There is no error code or anything else, it just says the app has not been installed.

Any idea why this happens? I only changed a few things in my app: I removed the basegameutils lib from my app and migrated to the new api without basegameutils. Thats it (except for some bugfixes but that can not be the cause).

I did already restart eclipse and cleaned all projects mutiple times.

The target sdk is 22 and I am using newest system images and so on for that api level (my divce is a stock nexus 6 with 5.1.1 running). I also updated my build tools to 23.0.1 from 22.0.1 and removed the 22 version. Is this the cause?

I also tried to upload the apk in the dev console and there were no erros.

Thank you for your help.


The logcat output says the signature does not match the previously installed version.

If i try to install the current live version via the play store there is also an error message saying i can not install this app because another user already installed an incompatible version on this device (but i dont have it installed and i dont have multiple users on the device).

If i got to the app menu in the settings my app is shown at the bottom of the list but there is a note saying the app is not installed for the users. If i click on it all buttons are unclickable (so i can not uninstall it).

What is happening?

How to solve:

For me, selecting Signature Version v1 and v2 both solved the problementer image description here


Your signature changed, so as you mentioned you must uninstall the previous version. You tried to uninstall from the device UI and that fails – so try it from the command-line:

adb uninstall your_package_name

Seen on Nexus devices, occasionally only command-line uninstalls work.


I found a solution but I still have no idea what caused the problem.

somewhere on my device my app was still installed even though it didnt show up in the app drawer and the play store told me the same. In the settings/apps menu my app was still present (as i mentioned in the edit of my original post) so i clicked on it. If you click on the menu button you can chose unisntall for all users which did the trick. now I can install my apk again.

I have no idea how this happened but there you go, i hope this helps.


I had the same problem as this guy had. the accepted answer over there is much nicer than my poorly foramtted text 😉

"You cannot install this app because another user has already installed an incompatible version on this device"


I was facing same problem And I solved it this way, For Current Updated Android Studio 2.3

  1. Build > Generate Signed apk.
  2. Create Keystore path.
  3. Put Password, alias, key password.
  4. Build type select accordingly(eg to release in playstore use release).
  5. Signature Version select both V1 and V2 checkboxes.
  6. Finsih.
  7. Go to the apk from explorer and use it for your playstore or in devices as Signed and Certified apk file.


For me the solution was to disable Play Protect on device.


You can not run signed apk directly in your android device .

I you want to run your apk then follow below steps :

1) Go to your device settings

2) In setting you find applications

3) In application checked unknown sources

This will allow you to run your signed apk without downloading from play store.

try this link :

"You cannot install this app because another user has already installed an incompatible version on this device"


The problem is because you have a version of your testing app. So, you’re not really upgrading the app! Those are two different apps. You must first uninstall previous version (testing) so you can install the release (signed) version of your app.


I got the save Error just incase someone faces this. For me it was because i have multiple projects for the same app on the phone. you need to delete older versions of the app from your phone.


If you have two options (V1 (jar signature) and V2 (Full APK Signature)) before generation signed apk. you should use V1 jar signature now, because there is no backward compatibility and all android phones with version < 7 won’t accept this signature. Backward compatibility will be added in some next N Developer Preview.
There are also explanations on this in this link :


In my case it was the proguardFiles path in build.gradle that caused this problem


There are few things to check to make it work

  1. Go to Settings -> Security -> Enable Install from unknown sources. In some devices it comes and Apps category ,or better search in Settings

    In some devices,(Lenovo K8 is one of them) you may have to specifically allow apps to install 3rd party apps. Allow Chrome, drive, your file manager to install. You may have to search around to find this.

  1. Enable USB debugging.
    Settings -> About phone ->Tap 7 times -> Go to Developer options ->Enable Usb debugging.

    Some apk files may be generated under debug build variant, So.

  1. Instead of opening it directly from the link shared in email/drive/WhatsApp,
    Copy the link. paste it inside the browser.
    Download the file
    Open it from the file manager, you will be able to install

  1. If none of the above methods works
    Check if you have any anti-virus/Cleaner app installed and look for play protect.


Currently PlayStore performs regular checks for apps and device for harmful behavior. Installing signed APK manually is treated like unusually behavior so is preventend.
So turn off play protect feature temporary and your install will work as charm!

  1. step one – open play store and select play protect
  2. step two – click play protection setting button
  3. step three – disable
  4. step four – close and install your APK manually

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