I was now able to click on App1.apk and it installed fine without the error. I pressed this and it said 'Uninstall for all users'.

But in the top right corner there is a three dot button. (I had set up my nexus to have more than one user).

Win upto 10 Crore Daily Withdraw Cash Instantly100Safe. When clicking on the pale version it said 'Not installed for this user'. Download Indias largest gaming pro app to play fantasy cricket, rummy & more online games. Solution for me: go back into settings/apps and scroll though all apps and at the bottom was a pale version of my App1 (note the original App1 was at the top in Alphabetical order which was deleted as above). Then I got the dreaded message 'App not Installed' I then opened google drive and clicked on my App1.apk and chose to install it (need to ensure you have allowed installation of apks in settings). There's a more recent version available below. After disconnecting my nexus from the usb, I went to the settings/apps and uninstalled my app (App1). I then created a signed apk and uploaded to my Google Drive. For me the situation was this: I had deployed to my nexus 7 (actual device) from within the Android Studio (v1.3.2). Clearly there are many causes of this problem.

Download youtube apk for android 44