The book has been written in such a way that the concepts are explained in detail, giving adequate emphasis on examples. To make clarity of the programming examples, logic is explained properly as well as discussed using comments in program itself. The book covers the topics right from the Introduction of the Android Studio and writing programs into it. The Android topics are discussed in detail taking into consideration the practical examples from simple to complex for the better understanding of students. Various sample practical exercises are included in the Book and their solutions so as to give students the basic idea of developing apps in Android. The examples given in book are user-focused and have been highly updated including topics, figures and examples.