android design patterns examples

Analysis of callback ideas in android system design, android callbackI. Why do I write this article? During the process of gradually getting into touch with android development, I have found that many callback ideas are used in android (at least in app development. For examp

callback function. Callbacks are programming-level design patterns, not language based. In C + +, to use the callback function, the called function needs to tell the caller his or her own pointer address, but there is no pointer in Java, what to do? We can implement the definition of callback functions through an interface (interface). Delegate ==callback in the. NET world. How do you use callbacks in

binder is essentially an underlying communication method and has nothing to do with a specific service. To provide specific services, the server must provide a set of interface functions for the client to remotely access various services. In this case, the proxy design mode is usually used: interface functions are defined in an abstract class (such as imediaplayerservice), and server and client implement all interface functions based on this abstract

L this document references and uses free images and content on the Internet, and is released in a free and open manner, hoping to contribute to the mobile Internet and the smart phone age! This document can be reproduced at will, but cannot be used for profit. L if you have any questions or suggestions about this document, go to the official blog Http://www.cnblogs.com/guoshiandroid/ (with the following contact information), we will carefully refer to your suggestions and modify this documen

After reading and translating the Android design guidance, we compared Android 4.0, Android 4.0, Android, Android, and earlier versions of app design guidance, and summarized the 10 maj

problem.So, at the end of 2014, I have introduced the teaching you to write Android network framework, teach you to write Android Imageloader framework, get the reaction is also good. Plus I am interested in architecture and design, so I have been constantly improving the design mode of the

Return key. The Return key in the honeycomb system bar exists in all applications in the world. Operation bar Most of the differences between the two platforms are the operation bar on the top. Android provides suggestions for the specific layout and visual form of the Operation bar elements, including the icon or logo position, navigation (such as drop-down menu or tag) and common operations. This is one of the most unified

. class), mConnection, Context. BIND_AUTO_CREATE );MIsBound = true;} Void doUnbindService (){If (mIsBound ){// Detach our existing connection.UnbindService (mConnection );MIsBound = false;}} @ OverrideProtected void onDestroy (){Super. onDestroy ();DoUnbindService ();}The code itself is not complicated, but it is a bit annoying. After you call the doBindService method, you cannot immediately obtain mBoundService instances ). To use an instance of the available service, you must wait until the on

Android Design and Development Series 2: Action Bar (Design), androidbarAction Bar TheAction barIs a dedicated piece of real estate at the top of the each screen that is generally persistent throughout the app. It provides several key functions: Makes important actions prominent and accessible in a predictable way (suchNewOrSearch). Supports consistent naviga

In my article and video "How to become an android guru", the author proposed some guidelines that must be mastered and followed to become a real Android guru: 1. Learn laziness 2. proficient in Android architecture, MVC, common design patterns, and IOC (inversion of control)

L this document references and uses free images and content on the Internet, and is released in a free and open manner, hoping to contribute to the mobile Internet and the smart phone age! This document can be reproduced at will, but cannot be used for profit. L if you have any questions or suggestions about this document, go to the official blog Http://www.cnblogs.com/guoshiandroid/ (with the following contact information), we will carefully refer to your suggestions and modify this documen

1. Open/closed (OCP) Introduction: to scale, do not modify it. For example, I provide an external interface. If you want to update the API, do not modify it directly. Instead, provide another API and notify you when to switch to the new API. For example, this design pattern is everywhere. Each Android upgrade will provide some new APIs, and some older APIs will be set to deprecated. For example, the Service

) {case PAY_INIT:order.getPayContext (); Break Case PAY_GOT_CONTEXT:order.createOrder (); Break Case Pay_updated_order:case Pay_applied_id:case PAY_ORDER_CREATED:payment.pay (order); Break Case Pay_succeed: Case Error_occurred:finishprocess (); Break Default:LogUtil.printPayLog ("state isn't correct!"); Finishprocess (); } private void Finishprocess () {this.order = null; This.payment = null; This.state = Paystate.pa

Action BarThe Action Bar is a dedicated piece of real estate at the top of each of the screens is generally persistent through Out the app.It provides several key functions: Makes important actions prominent and accessible in a predictable the (such as New or Search). Supports consistent navigation and view switching within apps. Reduces clutter by providing a action overflow for rarely used actions. Provides a dedicated space for giving your app a identity. If you're n