The book Mobile Applications for the Student and Developer Technician is designed for individuals seeking to gain knowledge about the process of developing mobile applications for the Android operating system. In the initial section of the book, the reader is provided with an introduction to the fundamental principles of the Java language. The initial section of the book presents an introduction to the fundamental principles of the Java language, object-oriented programming, and concurrent programming. The second part of the book deals with the creation of mobile applications in the Android Studio environment. It begins with an overview of the XML markup language, which is used to create the visual side of the application. The Java language is then introduced as the means of controlling the application.