学习Andriod------A Programmer‘s Guide

A Programmer‘s Guide

作者：Jerome DiMarzio

About author

JD 是一个有着15年开发经验的程序工程师。他主要从事于网络和项目开发中，本作者还有7本计算机技术书。也是算是个多产的人了。嘿嘿。他现在住在Central Florida（中佛罗里达）

 

下面就开始我们的Andriod之旅

What is Andriod？

（什么是Andriod那？）

Andriod一词的英文本义指机器人，它是Google公司2007年11宣布的基于Linux平台的开源手机操作系统，该平台由操作系统，中间件，用户界面和应用软件组成

Andriod的重要发展：

1.开放手机联盟成立

Open Handset Alliance

2.发布第一版Andriod SDK

3.Andriod 开发者竞赛

4.Anriod Market上线

5.T-Mobile G1 上市

6.Andriod1.0 SDK release1版本发布

7.Andriod被宣布开放源代码

8.Andriod 1.5，1.6，2.0，2.1，2.2，2.3，2.4，3.0发布

今年要发布3.1嘿嘿

工具：

这里就不介绍了，网上有的很多文章，还有我把书上的问答给大家翻译一下基本就没什么问题了：

Q: Eclipse is used to develop applications in Java, but can Android run applications
written in any other languages?

eclipse是用java开发应用程序的，那么Andriod能不能在其他语言中运行应用程序么？

A: As of the writing of this book, there were no other SDKs or emulators available to allow
Android development in any language other than Java.

本书出版今天为止，还没有其他SDKs或者可用的模拟器允许Andriod的项目运行，除了java

Q: Can you use Eclipse (and the Android SDK) with a version of the JRE other than
version 5?

你能用java 5版本么？

A: Technically you can use Eclipse with versions 5 and newer. However, the latest version
of Eclipse was only tested on the Java 5 JRE.

科学的说，你可以用，但最近的版本，测试的时候用的仅仅是java 5版本

Android Plugin.

地址：https://dl-ssl.google.com/android/eclipse/. Click OK.

Q: Is the Android SDK available for any languages other than Java?

Andriod SDK 能运行在其他语言上吗,除了java

A: No. Android applications can be developed only in Java.

不，Andriod 项目只能运行在java平台上

Q: Will there be updates to the Android SDK?

Andriod 能更新么？

A: Yes! Even during the writing of this book, an SDK update was released that addresses
many issues within the platform. I suggest checking the development page often for the
latest updates.

可以的。SDK的更新在网站上。我建议你更新最近版本

Q: If an update is released, how do I upgrade my SDK?

Upgrading the SDK can be very tricky. When a new SDK is released, chances are a
new plugin is also released. During the writing of this book, both a new SDK and a new
plugin were released. I attempted to use the “provided” upgrade tools to change
versions. However, this proved fruitless and left me with two conflicting versions,
neither of which worked correctly. I eventually had to uninstall both versions and
reinstall only the latest version. The newest SDK then worked correctly. I suggest that
anyone faced with the possibility of upgrading from one version of an SDK/plugin
combo to another use this same process: simply uninstall the older version, and install
the newer one, rather than upgrading.

上面的太多了。这里就大概说明下重点，他的建议在后面，先卸载旧版本，在安装新版本

其实还有更好的办法

上面没有QA中没有说明，这里说明一下：

From the command-line you can also directly trigger an update by
executing:
  tools\android.bat update sdk

这个是在Andriod SDK中找到的，很简单 嘿嘿

找到tools文件夹下的 andriod.bat

然后运行

出现下面图片就ok了

点一下Update All

全部update

获得下面的东东，然后安装就ok了

Andriod SDK 和 ADT Ecplipse Plugin

 

 

下面介绍一下Andriod的四大天王

1.activity

2.intend

3.service

4.contentProvider

 

在介绍上面的天王级人物之前，我先介绍一下 怎么查看android的版本

大家可以在cmd中输入android list targets

就会出现下面的

     Type: Platform
     API level: 4
     Revision: 3
     Skins: WVGA800, QVGA, WVGA854, HVGA (default)
id: 3 or "android-7"
     Name: Android 2.1-update1
     Type: Platform
     API level: 7
     Revision: 2
     Skins: WQVGA432, WVGA800, HVGA (default), WVGA854, QVGA, WQVGA400
id: 4 or "android-8"
     Name: Android 2.2
     Type: Platform
     API level: 8
     Revision: 2
     Skins: HVGA (default), WQVGA400, WQVGA432, WVGA854, QVGA, WVGA800
id: 5 or "android-9"
     Name: Android 2.3
     Type: Platform
     API level: 9
     Revision: 1
     Skins: HVGA (default), WVGA800, WQVGA432, QVGA, WVGA854, WQVGA400
id: 6 or "android-10"
     Name: Android 2.3.3
     Type: Platform
     API level: 10
     Revision: 1
     Skins: WQVGA400, QVGA, WVGA800, HVGA (default), WQVGA432, WVGA854 

 

嘿嘿大家可以看到  我有的版本到了2.3.3 现在有3.0的我这个更新只能到这个版本，大家可以先下载在更新，这样会有的

也可以独立的创建一个AVD

输入android create avd --name 2.2 --target 4