(Deeply Understanding Android: Volume I is a book that deeply analyzes the source code of Android by case method. The content is extensive, focusing on the analysis of the Framework layer, and integrating the Native layer and the Application layer; The analysis is thorough, and the analysis of each part of the source code strives to be thorough; It is highly targeted and attaches importance to the practical use and development requirements. The knowledge points included in the book are all mastered by the Android user developers and system developers)