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reference resources demand Realize the picture preloading function. When each picture is loaded successfully and failed, the loadProgress and loadError functions need to be called respectively; After the image is loaded, you need to call the loadComplete function. Optional: The above three interface functions can be switched at any time and ...

preface Plug in technology originated from the idea of running apk without installation. This apk without installation can be understood as a plug-in, and the app supporting plug-ins is generally called host. The host can load and run plug-ins at runtime, so that some infrequent functional modules in the app can be made into plug-ins. On the o ...

1, Introduction to Xiangyuan mode          In the process of object-oriented programming, we sometimes face the problem of creating a large number of instances of the same or similar objects. Creating so many objects will consume a lot of system resources, which is a bottleneck to improve system performa ...

(1) Simple factory mode Mainly used to create objects. Adding a new class will not affect the previous system code. The core idea is to use a factory to generate different classes according to the input conditions, and then get different results according to the virtual functions of different classes. GOOD: applicable to different situations ...

1. What is combination mode? Compose objects into tree structures to represent part-whole hierarchies.Composite lets clients treat individual objects and compositions of objects uniformly. Composite Pattern: combine objects into a tree structure to represent the "part whole" hierarchy, so that users can use single objects and c ...

The previous chapter introduces the business scenarios and usage of the simple responsibility chain model. In actual code, it may be better to combine multiple modes. The implementation of the service in the previous article is very cumbersome, and the next must be specified. These cannot handle the business gracefully in the business scenario. ...

preface This article is based on the PineAppRtc project github.com/thfhongfeng... In webrtc, the recording and playing of audio are encapsulated inside. Generally, we don't need to pay attention to it. We can use it directly. But recently, there is a requirement to transmit our own data, so we need to expose these interfaces for use. So we n ...

1, Starbucks Coffee order demand          Starbucks Coffee order project (CAFE): Coffee type / single product: Espresso, ShortBlack, longblack, decaf.Seasoning: Milk, soy Milk, ChocolateIt is required to have good expansibility, convenient modification and convenient maintenance when expanding new coffe ...

1. What is adapter mode? Convert the interface of a class into another interface clients expect.Adapter lets classes work together that couldn't otherwise because of incompatible interfaces. Adapter Pattern: transforms the interface of a class into another interface expected by the client, so that two classes that cannot work together due to ...

Template method design pattern is a behavioral design pattern. This pattern is commonly used to define a template or algorithm model for a specific operation. Take OTP (One Time Password) as an example. There are two common one-time passwords: SMS password (SMS OTP) or email password (Email OTP). However, the processing steps for both SMS passw ...