[helloAndroid 读书笔记] key concepts

最新推荐文章于 2025-11-26 22:21:13 发布

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本文深入探讨了Android SDK中每个开发者都需掌握的四大关键组件：活动、意图、服务和内容提供者，并提供了针对编辑main.xml时遇到错误的解决方法，指导开发者如何安装SDK文档和源代码，以及升级到AD2.2版本，同时介绍了快速查找文档的技巧，以及abd命令的使用方法。

chapter 2.3

A few objects are defined in the Android SDK that every developer needs
to be familiar with. The most important ones are activities, intents,
services , and content providers.

Activities
An activity is a user interface screen . Applications can define one or
more activities to handle different phases of the program.

Intents
An intent is a mechanism for describing a specific action, such as “pick
a photo,” “phone home,” or “open the pod bay doors.” In Android, just
about everything goes through intents, so you have plenty of opportunities
to replace or reuse components.

Services

Content Providers

3.4

there is error when edit main.xml?

adugment of the layout: the size of button,the position of the button

debug:

HOW install doc and source code for the SDK

how to upgrade to AD2.2?

如何快速查找doc?

abd的使用：sdk/tools，通过cmd窗口运行，例如上传一个文件：

adb push a.mp4 /data

chapter5