Do Android development for three years, have written project also has a lot of the basic knowledge of Android and framework used is not in-depth study, proficient in ground floor, also be familiar with complete want, reviews three years project, complete the basic functional requirements: network request, loading images, mobile payment, map navigation, interface optimization are it's not a big problem, but do things too repetitive, though he also tried to abstract processing logic, and extract the superclass reduce duplication of the wheel, making the interface specification View, Presenter, between the Model specification, and it does have some effect, avoided a lot of unnecessary repetition in development, but always can't achieve a set of architecture is the fastest response to the new development tasks still cannot go further in the architecture, especially the subcontract, always feel some kind of how points are not appropriate, classification of common and utils package time is long and sometimes cannot be directly copied to another project, decoupling solution is incomplete, please, recommend a more perfect under the Android project learning,