什么是＆QUOT;点＆QUOT;注册一个活动时，对 [英] What's the "dot" for when registering an Activity

问题描述

我是怎样的一个小白在编程为Android操作系统。我注意到，在书我一直在读的注册他们的活动清单时，作者都放置了一个点的活动名称的前面。我环视了一下Android开发者网站，我能不明白，为什么我们需要的点。请问点，实际上服务器的目的？我需要它？我已经包括下面的一个例子。请注意NewActivity前的点：

 ＆LT;活动机器人：名称=。NewActivity＆GT;＆LT; /活性GT;
 

解决方案

正如您已经注意到的一点是没有必要的，但它的基本含义：活动类生活在同一个包中的应用程序的。所以，如果您的应用程序包为： com.my.package 则：

• .YourActivity 意味着你的类里面 com.my.package 。
• YourActivity 意味着你的类里面 com.my.package （同​​上）。
• .activities.YourActivity 意味着你的类里面 com.my.package.activitites 。
• 您甚至可以这样做： com.my.package.activities.YourActivity 当你想要有不同的版本，您的应用程序，并使用Ant来改变这是有用自动给包的参考文献。

I'm kind of a noob at programming for the Android OS. I noticed in the books I have been reading that the authors have placed a "dot" in front of the activity name when registering their activities in the manifest. I've looked around the Android developer site and I can't figure out why we need the "dot". Does the "dot" actually server a purpose? Do I need it? I have included an example below. Notice the "dot" before "NewActivity":

<activity android:name=".NewActivity"></activity>

解决方案

As you have noticed the point is not necessary but it basically means: the activity class lives in the same package of the app. So, if your app package is: com.my.package then:

• .YourActivity means that your class is inside com.my.package.
• YourActivity means that your class is inside com.my.package (same as above).
• .activities.YourActivity means that your class is inside com.my.package.activitites.
• You can even do something like: com.my.package.activities.YourActivity which is useful when you want to have different versions of your app and use Ant to change the references to the package automatically.

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