Android LiveData-阿里云

构建高效Android应用：采用MVVM架构与LiveData的全面指南

在移动开发的世界里，Android平台的多样性和碎片化一直是开发者需要面对的挑战之一。为了解决这些问题并提高应用质量，采用合适的架构模式至关重要。近年来，MVVM架构由于其清晰的分层设计和良好的可测试性而受到重视。结合Android Jetpack中的LiveData，它为开发者提供了一种强大的方式...

android开发，使用kotlin学习LiveData

LiveData是Jetpack提供的一种响应式编程组件，它可以包含任何类型的数据，并在数据发生变化的时候通知给观察者。也就是说，我们可以将数据使用LiveData来包装，然后在Activity中去观察它，就可以主动将数据变化通知给Activity了。1.简单使用class MainViewMode...

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Android rxjava和LiveData中的内存泄漏

最近的一个项目，是采用由RxJava、LiveData提供支持的响应式架构。尽管这些库功能强大，内存泄漏的情况；什么是内存泄漏内存中不再使用的对象，被另一个正在使用的对象引用，导致 GC 无法清除它并释放内存如果我们有两个相互持有强引用的对象，即使没有任何外部引用，也会发生内存泄漏。这就是所谓的保留...

Android ViewModel+LiveData实现Fragment间通信详解

前言：使用ViewModel+LiveData实现同一个Activity不同Fragment间的通信。1、定义ViewModel与LiveData,使用LiveData对progress字段进行包装。/** * @Author: ly * @Date: 2022/10/24 * @Descript...

Android ViewModel与LiveData组件组合使用详解

一、首先使用ViewModel写一个小案例，之后在此基础上，结合LiveData一起使用。1、创建TimerViewModel类/** * @Author: ly * @Date: 2022/9/13 * @Description: 继承ViewModel类，将视图与数据分离 */ public c...

Android JetPack组件之LiveData的使用详解

前言：LiveData的介绍LiveData 是一种可观察的数据存储器类。与常规的可观察类不同，LiveData 具有生命周期感知能力，意指它遵循其他应用组件（如 Activity、Fragment 或 Service）的生命周期。这种感知能力可确保 LiveData 仅更新处于活跃生命周期状态的应...

Android Jetpack 应用指南（一） - LiveData

前言从事Android开发两年有余了，从15年开始学习Android，到17年开始实际接触企业级Android APP的开发，这一路也从MVC走到了MVP。19年辞职后，休息期间研究了一下最新的Android Jetpack，萌生了一个大胆的想法——计划使用当前各类成熟的框架和技术如组件化、插件化...

Android 架构之 MVI 初级体 | Flow 替换 LiveData 重构数据链路(下)

lifecycleScope刚才是在lifecycleScope收集新闻流的，它是一个和生命周期对象绑定的协程域：public val LifecycleOwner.lifecycleScope: LifecycleCoroutineScope get() = lifecycle.coroutine...

Android 架构之 MVI 初级体 | Flow 替换 LiveData 重构数据链路

引子这也是《如何将业务代码越写越复杂》系列的第二篇。上一篇用实战代码演绎了 Feeds 流场景下，业务层代码如何从 “无架构” 到 “MVP” 再到 “MVVM”，并使用LiveData承载整个数据链路。这一篇尝用 Kotlin Flow 替换掉 LiveData，看看会发生些什么变化及遇到哪些问题...

Android 基于Jetpack LiveData实现消息总线

消息总线在Android开发中，跨页面传递数据(尤其是跨多个页面传递数据)是一个很常见的操作，可以通过Handler、接口回调等方式进行传递，但这几种方式都不太优雅，消息总线传递数据的方式相比更优雅。消息总线最大的优势就是解耦，避免了类与类之间强耦合，通常消息总线有以下几种实现方式：EventBus...

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