未签名APK

Question

我使用android studio和SDK 23创建了一个APK，当我在调试模式下构建时，它可以顺利地安装在移动设备上并完美运行，但是当在发布模式下进行签名和编译时，会在移动设备上启动安装过程，但最后我留下了消息“未安装应用程序”。

Answer 1

It's probably due to difference in sign certyficates. Your debug apk is signed with developer certyficate and your release apk with different one.

Solution uninstal the debug apk befor instaling the release one. There won't be any signing conflicts after that and the instalation should instal as smoth as the debug apk.

Answer 2

This is actually a thing that android does not install outdated APK files. For example when you create two signed APK's. One has the version 0.8 and one is 1.0 it won't install the 0.8 one when the 1.0 one is installed.

So apparently the debug version is considered a better version of the app so Android won't install.

As Karol said the Solution is to simply uninstall the app and then install the signed apk.

EDIT : I now looked at handike's possible duplicate and it is basically saying what I said.

Answer 3

谢谢，我卸载了未签名的应用程序，然后卸载了新的（签名的）应用程序，并且运行良好