我也面临着同样的问题。问题是我的AndroidManifest.xml文件中的主要活动写了两次。我删除了副本。

Clearly there are many causes of this problem. For me the situation was this: I had deployed to my nexus 7 (actual device) from within the Android Studio (v1.3.2). All worked fine. I then created a signed apk and uploaded to my Google Drive. After disconnecting my nexus from the usb, I went to the settings/apps and uninstalled my app (App1). 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). Then I got the dreaded message "App not Installed"

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). When clicking on the pale version it said "Not installed for this user". (I had set up my nexus to have more than one user). But in the top right corner there is a three dot button. I pressed this and it said "Uninstall for all users". Which I did and it fixed the problem. I was now able to click on App1.apk and it installed fine without the error.

有时是因为你的手机没有足够的空间。如果是这样，请尝试清理内存，为新安装创造空间。

如果您正在使用cordova，请尝试卸载任何以前通过cordova构建的应用程序。 很奇怪，但是这个方法解决了我的问题

如果您试图直接从谷歌驱动器安装apk，只需重新启动设备就可以为我解决问题。

如果你尝试了上面所有的答案，没有一个有效，你可能想试试这个:

如果你的构建变量是“调试”，那么你应该在应用程序构建gradle的buildTypes下添加这个，以便应用程序安装到你的设备上:

debug {
    minifyEnabled false
}