
Yoon Jae-seong's Java-based Android App Development Part 1 - UI Programming
softcampus
This lecture is a lecture by instructor Jaeseong Yoon, who teaches Android lectures at App School: Like a Cool Lion.
초급
Java, Android
Stop making low-quality apps. Let's make clean and beautiful Android apps with Kotlin.

How to use Android Studio
How to Design Android Apps
How to use different views
How to use Kotlin libraries
How to handle JSON files
Android app, from development methods to know-how!
To develop a simple app
For those who take several days or weeks
I prepared this lecture.
I've been coding for over 10 years. When I was younger, I was into Flash, and now I'm into Android and Python, so I've been coding steadily.
But unfortunately, I wasn't a coding genius, and no matter how hard I tried to code, my skills didn't improve much. While I was in a slump, I happened to take an online course.
The online lecture changed my life completely. It gave me a new sense of development of minor and shabby Android apps every day. I watched each video of the lecture 5 times, and after taking all the lectures, I no longer fear app development.
And most importantly, I was able to overcome my own ‘technical limitations’ .
Since then, I have been living a life where I fully benefit from technology, making fun games with Android Studio and even starting a business.
Literally, one online lecture changed my life.
I created this lecture with the hope that you will feel the same emotions, changes, and innovations that I have experienced.
At that time, the material became an 'out-of-date lecture' over time, so I created an upgraded version of the lecture based on the latest Android Studio .
Learn how to develop Android apps using Kotlin .
Currently, we are covering a total of two app developments, but we plan to open additional classes in the future based on student requests.
Please check before requesting a class!
Android app
Anyone who wants to develop
For Android app development
Those who feel limited
Mobile App Development
Anyone who wants to learn know-how
How to use Kotlin
Anyone who wants to learn
This lecture contains not only Android development methods but also know -how.
We share various know-hows such as how to sell an app, how to create an app quickly, and how to organize the layout neatly.
The lecture basically proceeds in the order of 기본기 👉 앱개발 응용 .
Q. Please introduce yourself in one word!
I am a freelance developer and freecoder. I have been working as a freelancer for 5 years and enjoy coding freely without being restricted by time and place.
Q. I don't know anything about Kotlin. Will it be difficult to take the course?
If you don't know the Kotlin language, it will be difficult to understand the class 100%. Therefore, we recommend that you take this course while taking other free Kotlin courses.
Q. Are there any other courses you are running?
There is a lecture titled <Branding Roadmap for Freelance Developers Earning 100 Million Won a Year> .
Based on the current 87 students, this course has a perfect score of ⭐ and contains various contents necessary for the survival of freelancers.
Q. Do you teach anywhere else besides Inflearn?
Yes, we are conducting classes online through Class 101, Tal-ing, and Cremon, and we are also operating an offline coding camp called ‘Awakening Coding.’
Who is this course right for?
Those who need Android app development know-how
Those who aim to develop Android apps with Kotlin
Need to know before starting?
Kotlin Basics
I'm Freecoder, a freelance coder😊
👉Go to Freecoder YouTube Channel
Experience
✔Developed and sold an app with 100,000+ downloads (2018)
✔ Running a popular class with over 1,000 students on Class101 (2020 ~)
✔Developed and sold an online business with an average monthly net profit of 15 million KRW (2021)
✔ Operated a residential coding camp (2021)
✔Artificial Intelligence Monetization Lecture using GPT (2023)
✔AI Business Monetization Lecture using GPT-4 (2023)
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17 lectures ∙ (1hr 35min)
Course Materials:
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I was expecting a lecture that would give tips from experts, but it only covers very basic topics. If you have experience in carrying out projects, you will not gain anything.
As stated in <Learn This!>, this course is for beginners.
Explore other courses in the same field!