Android开发学习的相关内容

Android开发，使用kotlin学习多媒体功能（详细）

一、通知 1.用到的类和方法（1) Context类 getSystemService（）接收一个字符串参数用于确定获取系统的哪个服务，...

android开发，使用kotlin学习Fragment

1.Fragment的介绍Android在3.0版本引入了Fragment功能，它非常类似于Activity，可以像Activity一样包含布局。它出现的初衷是为了适应大屏幕的平板电脑，使用Fragment我们可以把屏幕划分成几块，合理利用屏幕空间。Fragment通常是嵌套在Activity中使用...

开源Android容器化框架Atlas开发者指南

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android开发，使用kotlin学习WorkManager

WorkMananger的简介Google推出WorkManager组件，WorkManager很适合用于处理一些要求定时执行的任务，它可以根据操作系统的版本自动选择底层是使用AlarmManager实现还是JobScheduler实现，从而降低了我们的使用成本。另外，它还支持周期性任务，链式任务处...

Android开发，学习LinearLayout布局

1.LinearLayout布局简介LinearLayout是将其包含的子控件以横向或者纵向的方式排列，简单来说就是其子元素被排列成一行或一列。LinearLayout的排列方式 vertical（垂直） ...

android开发，使用kotlin学习HTTP访问网络

HTTP协议的简介在日常生活中，我们使用手机APP时，APP展示的数据基本上都是通过网络接口从服务器中获取的。HTTP是一种请求/响应模式的协议，当客户端与在服务器建立连接后，向服务器发送请求，称为HTTP请求，服务器收到请求后会做出响应，称为HTTP响应HTTP协议的请求HTTP有两种常用的请求...

android开发，使用kotlin学习消息机制Handler

Android的消息机制主要是指Handler的运行机制以及Handler所附带的MessageQueue和Looper的工作过程。1.消息机制原理的解释：在主线程里创建一个Handler，然后在分线程中引用这个Handler来发送Message对象给MessageQueue，循环器Looper从M...

android开发，使用kotlin学习滚动控件RecyclerView

1.RecyclerView介绍RecyclerView是一个增强版的ListView（Android 5.0推出）。被用来代替ListView和GridView控件，并且能够实现瀑布流的布局。它更加高级并且更加灵活·，可提供更为高效的回收复用机制，同时实现管理与视图的解耦合。2.RecyclerV...

android开发，使用kotlin学习Service

服务简介服务是Android中的四大组件之一，它能够长期在后台运行且不提供用户界面。即使用户切到另一应用程序，服务仍可以在后台运行。 2.服务的创建(1)创建Service子类class MyService : Service() { override fun onBind(inten...

android开发，使用kotlin学习Room

之前我们学习了SQLite数据库的使用方法，不过当时仅仅是使用了一些原生的API来进行数据的增删改查操作。这些原生API虽然简单易用，但是如果放到大型项目当中的话，会非常容易让项目的代码变得混乱，除非你进行了很好的封装，为此市面上出现了诸多专门为Android...

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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