Installation error: INSTALL_FAILED_UID_CHANGED no root
adb, android, eclipse
Solution
I had the same issue in my non-rooted Nexus 5. I managed to solve it without root access nor Factory reset.
For this device, I managed to solve it by going to `Settings -> Storage -> Misc` and try to delete any files related to the faulty app (in my case, an .apk that was pushed from Android Studio and a .db file). I also clicked on `Cached data` to wipe the cache for all apps.
I don't know exactly which of the two things triggered the solution. You probably want to try to delete some files in `Misc` before wiping the cached data, since it seems less of an overkill.
It seems to be that there were some remaining files from a previous installation which weren't wiped with the uninstall (probably an issue in the Android installation system). These files aren't accessible without root access, since they are under the /data/local/ folder. Apparently the Storage tools for the Nexus 5 have permission to delete files under that folder.
I don't know whether other devices have a similar set of storage tools.
Problem
I have checked all the solutions, comments and answers of all other questions in StackOverflow. I have been running, compiling and debugging my app for months. But suddenly it started to appear this message in my Eclipse when using my Nexus to play with it. MOBILE: - I have no root !!! (It's a Nexus, and I have no root, and all the answers in other Stackoverflow's questions need root to be executed) - The application is uninstalled, there's no trace of it in "Applications" - Since I don't have root access, I can not access to /data/data folder, or /data/local, or /data - I do know problem would be solved resetting the phone to factory settings, but, sincerely, I can not. ECLIPSE: - I have cleaned the project many times, restart Eclipse and even update it - I can not change the name of the project (as one solution suggests), since it's a long time project and I can not change it Console says: - Installation error: INSTALL_FAILED_UID_CHANGED - Please check logcat output for more details. - Launch canceled! Logcat says: - 01-05 12:18:19.265: W/ActivityManager(761): No content provider found for permission revoke: file:///data/local/tmp/MyApp.apk - 01-05 12:18:20.855: W/PackageManager(761): Package couldn't be installed in /data/app/com.myapp-1.apk I can install, uninstall other APK/applications with no problems at all. So it's not about permissions in /data folder/subfolders CONSOLE: - If I try to uninstall (with -d or any other parameter) the app it says: "Failure" (because adb does not find the app in the phone) So, I'm not debugging with virtual machine / emulator. I have a Nexus no-rooted with no trace of the application, and I can not build the app from Eclipse to the device. Thank you