I have been actively involved with Android Architecture, AAOS, and BSP, focusing extensively on the boot-up sequence and the Android framework layer. My understanding of the architecture encompasses everything from the kernel driver to the application layer. I have hands-on experience with kernel drivers related to power, camera, and audio, as well as the HAL layer, which serves as the interface between drivers and higher layers. I am well-acquainted with the native framework layer, which includes services written in C/C++, and the Android Runtime (ART) that interprets .dex files. Additionally, I have worked on the application framework layer, which consists of managers and services in Java.

Throughout my journey, I have faced challenges such as system blackouts and unexpected reboots, identifying system service crashes as the root cause of these issues. By debugging and resolving the problems within the system service, I successfully addressed these concerns. I have made modifications to the power manager and system services, and I have integrated numerous system applications.

These experiences have been both challenging and rewarding.