Inside the archive, go to folder META-INF Once you’re done with your changes, you have to take care about the signature files that are part of the. zip)Ĭhange the resource in the archive as desired (packager tools allow to change files without the need to extract the archive) apk file with WinRAR (if that doesn’t work, rename the file extension. Do the actual desired modifications inside the. There are 3 steps that need to be followed in order to modify an existing. In order to execute the commands described below, you need to have Java on your PATH variable of your Windows system (see for an explanation).

If you aren’t familiar with Android, but wish to be, you might want to check the documents and Īll prerequisites for understanding this blog are explained there. The description is based on the following software and versions: So I had to figure out how to achieve that: modify the app without having access to the source code.īelow, I’m sharing the required steps with you. apk file.īut there was the requirement that they wanted to modify the ready application (change configuration data). I had to deliver the application to my users as. I had created an Android application using SAP Netweaver Gateway Productivity Accelerator. – property files containing configuration data – files which are placed in the assets folder However, there’s still the valid use case to modify or replace files inside an existing. The reason is that after the modification, the checksum and the signature are not valid anymore. The following screenshot displays the error when installing the modified sample application myApp.apk on an Android device: apk on the smartphone (or tablet or similar), you’ll get an error. So you can easily open it and view the files – although viewing most of the files won’t make you happy, because you’ll realize that they’re compiled, in binary format, etcĪnyways, you can open the archive and then modify any resource file and save the modification in the archive.īut if you afterwards try to install the. apk file is a simple archive that can be opened with any packager like e.g. apk file represents the mobile application as it is installed on a mobile device, like smartphone, tablet, wearable, etc. Today I’d like to share with you my findings about how an existing.

Download apk from play store url