Programmer Think

There are six principles and twenty-three design patterns in the design pattern. The six principles are: single responsibility principle, opening and closing principle, Richter substitution principle, dependency inversion principle, interface isolation principle and Dimitri principle. Twenty three design patterns: Singleton pattern, Builder pat ...

List is the most common form in App. ListView is provided in fluent to implement the list. This article will implement a list with pictures and texts through ListView. Interface layout analysis The list to be implemented in this chapter is shown in the figure above. After we get the interface design draft, the first thing we do in UI devel ...

Recommended by Haowen: Author: riane Let's analyze in detail what our fingers have experienced from touching various views on the screen to the end of this click event. Event type There are three types of touch events: int action = MotionEventCompat.getActionMasked(event); switch(action) { case MotionEvent.ACTION_DOWN: ...

In the process of learning AIDL, I can't read many books and find a lot of information on the Internet. Finally, I can realize the call of AIDL. Here I write my understanding and implementation to facilitate the memo search. The main reason is that their foundation is too poor, others write too tall, and they still can't understand a lot. Writ ...

🔥 introduce This paper implements a network request box through okhttp + retrofit + rxjava + hit. 💥 Final code         iWanAndroidService.register(map)                 .compose(ResponseTransformer.obtain())                 .subscribe(registerData -> {                     //Request succeeded                 }, new ErrorConsumer() {     ...

1. Preface In my previous blog, I spent a few days doing a case of multi-threaded download, and tried to package it into my own wheel library. For example: Android file multithreading downloadMulti thread download of Android files (II)Android single thread breakpoint DownloadAndroid file multithreading breakpoint DownloadAndroid multithre ...

2021SC@SDUSC Component analysis In the previous blog s, we have analyzed some components, including scrollview, viewPager, waterfallView, image and list view components. This time, let's interpret the textInput component. textInput component textInput is the basic component of input text. It provides the configuration of a variety of fea ...

Android officials recommend using concurrency to deal with asynchronous problems.Characteristics of collaborative process:Lightweight: multiple coroutines can be run on a single thread. The process supports suspension, which will not block the thread running the process. Suspending saves memory than blocking and supports multiple parallel opera ...

              In the previous article, we introduced the startup and initialization of AudioPolicyService and AudioFlinger services. Here's a look at what AudioTrack and AudioFlinger did.                 MediaPlayer will create the co ...

prefaceIn the previous article, we introduced the basic knowledge of View and the implementation of View sliding. This article will bring you a core knowledge point of View, event distribution mechanism. Event distribution mechanism is not only a core knowledge point, but also a difficulty in Android. Let's analyze the transmission of events fr ...