The full form of APK is Android Application Package. APK is the application file format used by Android and a variety of other Android-based operating applications in mobile phones, video games, and middleware for distribution and installation. APK files are equivalent to Microsoft Windows software packages such as Debian packages or APPX files in Debian-based software applications.
Key information about APK
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- An APK file comprises assets, resources, certificates, a manifest file, application programmes like dex files, and so on.
- APK files, like other file types, can have any name, but it must end in the apk file extension for identification.
- The Android foundation allows clients to install APK data files only when they enable Unknown Sources, which allows installation from sources other than branded ones, such as Google Play.
- This can be used for a variety of reasons, including installing non-store apps or updating to a previous version.
- While it is feasible to downgrade an application by first uninstalling the current version, it is better to do so via Android Debug Bridge because data can be saved.