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A baby milk dog will have a name, breed and a bunch of lovely characteristics as its attributes. If you model it as a class and only use it to hold these attribute data, you should use the data class. When using data classes, the compiler will automatically generate toString(), equals() and hashCode() functions for you, and provide them out o ...

prefaceView can be said to be a role used every day in daily development. Although view does not belong to the four components, its role and importance can not be underestimated. This type of article is intended to write a series to provide a way for self review or novice learning.View BasicsThis article mainly introduces some basic knowledge o ...

HandleroutlineHandler is used for message passing between threads. It can switch tasks in one thread to another thread for execution. The target thread of the switch is consistent with the thread of the Looper held inside the handler. If the Looper is not set manually when initializing the handler, the handler will obtain and hold the Looper of ...

preface In the previous article, we mainly explained Kotlin's knowledge points related to sets. In this article, we will explain Kotlin's objects in detail! 1. Object 1.1 example 1 (no constructor) class Player { //Analysis point 1 var name = "abc" get() = field.capitalize() set(value) { field = value.trim() ...

summary           Mmkv is a key value component based on mmap memory mapping. The underlying serialization / deserialization is implemented by protobuf, with high performance and strong stability. It has been used on wechat since mid-2015, and its performance and stability have been verified over ti ...

This article undertakes Android finds the nearest control that can get focus (I) findNextFocus() step 3 The relevant codes are excerpted as follows: focusables.clear(); effectiveRoot.addFocusables(focusables, direction); if (!focusables.isEmpty()) { next = findNextFocus(effectiveRoot, focus ...

This section is< < detailed explanation of player startup process of ijkplayer code reading > >Continuation of. We are looking at how the ijkplayer workflow works. We only focus on reading part 2.5, 2.6 and 2.8 of the code Clear ffplay workflow. Part 2.0 of the code is mainly ffplay control interface thread, and the implementation ...

1. Functional analysis 1.1 stopwatch function interface 1.2 App structure 1 Activity: MainActivity1 Layout: activity_main.xml 2. Development view layout 2.1,activity_main.xml <?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" ...

The input method is dialog or full screen dialog and will not be disassigned. The display and hide system call methods are showWindow(true) and hide(). The following is the creation of the input method Window. SoftInputWindow inherits dialog. Needless to say, mWindow = new SoftInputWindow(this, "InputMethod", mTheme, null, null, mDispatcherSta ...

Android 7.0 and Android 8.0 have great differences in the processing of AMS related parts AMS family for Android 7.0 There are three main categories ActivityManager Activity manager is a class associated with AMS. It mainly manages running activities. These management tasks are not handled by ActivityManager, but by AMs Activit ...