The Apk removes the signature and the method for re-signing. The apk removes the signature.

The Apk removes the signature and the method for re-signing. The apk removes the signature.

In Android development, it is very important to sign the Apk file with your own key. The Apk file without signature cannot be installed, even if it is installed, it will fail.

The "check to allow the installation of applications with unknown sources" circulating on the Internet does not have to be signed. To put it bluntly, the installation of applications that are not downloaded from the electronic marketplace is allowed.

In the past few days, I have to modify the. so file called by JNI In the Apk, so I had to study the signature problems because I didn't have the apk source code. Of course there are many third-party tools that can be done, but in fact JDK already provides the powerful signing tool jarsigner.