APK Explorer & Editor, an open-source tool to explore the contents of an installed APK, is strictly made with an aim to inspect an installed APK file.

APK Explorer & Editor (AEE) includes a set of open-source tools mainly designed to explore the contents of an installed application on an Android device. Additionally, AEE offers a feature-rich APK/Split APK's/App bundle installer which allows users to pick and install files from device storage.
Features
* A beautifully designed list view of installed applications.
* Explore and navigate through the contents of an installed application.
* Export and easily manage (install, share etc.) APK's/Split APK's into device storage.
* Includes a feature-rich APK/Split APK/App bundle installer (easily pick and install files from device storage)
* Easily extract an app icon by single-clicking on it.
* Provides basic information about important resource files.
* View graphics, texts, binary XML, and many more.
* Save/Export individual resource files to device storage.
* It is also possible to edit text/binary XML files using an in-built text editor (disabled by default in the Settings menu).
* Delete or replaces resources.
* Assemble modified smali files into new classes (.dex).
* Create signed APK's/App Bundles after the above-mentioned processes.
* Resign APK's/bundles with AEE custom key.
* Elegantly designed user interface with an auto-dark/light theme.
* A lot more.