The content is easy and seems like it will be very helpful.

coolpoby4175

This course is a Java Android app development course consisting of a total of 4 parts. In the second lecture, we will look at the menu and the 4 major components through practical examples.

softcampus

Yoon Jae-seong's Java-based Android App Development Part 2 - Menu and 4 Major Components

입문

초급

중급이상

자바

Java

안드로이드

Android

Course Introduction and Development Environment Setup

Android menu

Activity

Android Messaging

Thread and Service

Fragment

Class materials