AAPT is an acronym for android asset packaging tool. It handles the packaging process.

AAPT stands for Android Asset Packaging Tool. It is a command-line tool included with the Android SDK (Software Development Kit) that helps developers package and compile their Android application’s resources (such as images, XML files, and other assets) into the binary format required by Android devices. AAPT is used during the build process to create the APK (Android Package) file, which is the package format used by Android for distributing and installing applications on devices.