Android组件_第3页-阿里云

Android Studio开发之使用内容组件Content获取通讯信息讲解及实战（附源码包括添加手机联系人和发短信）

运行有问题或需要源码请点赞关注收藏后评论区留言一、利用ContentResolver读写联系人在实际开发中，普通App很少会开放数据接口给其他应用访问。内容组件能够派上用场的情况往往是App想要访问系统应用的通讯数据，比如查看联系人，短信，通话记录等等，以及对这些通讯数据及逆行增删改查。首先要给A...

Android Studio开发之应用组件Application的讲解及实战（附源码，通过图书管理信息系统实战）

需要源码请点赞关注收藏后评论区留言~~一、Application的生命周期Application是Android的一大组件，在APP运行过程中有且仅有一个Application对象贯穿应用的整个生命周期打开AndroidMainfest.xml 发现activity节点的上级正是applicati...

开源Android容器化框架Atlas开发者指南

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《移动互联网技术》第十章系统与通信: 掌握Android系统的分层架构设计思想和基于组件的设计模式

🌷🍁 博主 libin9iOak带您 Go to New World.✨🍁🦄 个人主页——libin9iOak的博客🎐🐳 《面试题大全》文章图文并茂🦕生动形象🦖简单易学！欢迎大家来踩踩~🌺🌊 《IDEA开发秘籍》学会IDE...

移动开发平台 android 扫码组件能否自定义相机比例

项目中用到扫码组件，现在camera默认采样为全屏，现在需要将其绘制在一个3:4的view中，导致预览时被拉伸。求问需要怎样调节扫码时的camera的比例

mpaas音视频通话组件，iOS没有错误码文档，我看安卓是有的，iOS和安卓的错误码一样么？

问题一：mpaas音视频通话组件，iOS没有错误码文档，我看安卓是有的，iOS和安卓的错误码一样么？问题二：-(void)didParticepant:(ARTVCParticipantInfo*)participant leaveRoomWithReason:(ARTVCParticipantLe...

flutter android 原生集成mPaaS扫码组件以后，运行报错找不到 so库

根据文档对flutter项目接入mPaaS扫码组件以后使用打开flutter 原生Android项目可以正常运行项目，但是使用flutter工程运行，报错提示:java.util.concurrent.ExecutionException: java.lang.UnsatisfiedLinkErro...

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ViewModel状态的保存(程序在后台被系统杀死数据也存活)

前言：本篇是在上一篇的基础上，进行的修改，没有看上一篇请先移步上一篇文章Android JetPack组件之DataBinding的使用详解想要在程序被系统杀死后，数据依然还在有两种方法。第一种方法就是比较旧的一种方法，重写onSaveInstanceState方法，来存放我们想要保存的界面数据。直...

Android JetPack组件之DataBinding的使用详解

前言：DataBinding的介绍数据绑定库是一种支持库，借助该库，您可以使用声明性格式（而非程序化地）将布局中的界面组件绑定到应用中的数据源。要开始使用数据绑定，必须将应用配置为使用数据绑定，在应用模块的build.gradle 文件中添加 dataBinding 元素android { ...

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...

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