The lecture was so good 👍 The code provided in the lecture did not have any errors. It was good because it was different from other lectures in this part (not having to spend time catching errors). It was good because the code process was skipped quickly, which saved time and prevented boredom. In the process of refactoring by technology, it was good to organize the content by finding and using the technology on the blog. Overall, I organized the information I knew, and I think I should listen to the lecture again and make the information I don't know mine. Thank you for creating an Android lecture that is absolutely uncommon.