• The Android operating system is represented by the Android ROM. This is the user interface (Sense UI on HTC phones) as well as the file system for keeping track of contacts and other information. It is made up of a Linux kernel as well as other add-ons that provide additional functionality.
• Understanding the Android Rom's structure.
• Kernel, system, and other partition information functions.
• Smali's, Java, and XML compilation and debugging
• The fact that Android is open source is one of its most appealing aspects. The whole operating system source code is accessible for free, including the kernel, UI, libraries, and important programmes. This means that anyone (with the necessary technical knowledge) may compile Android from the ground up and install it on a suitable device.

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