By clicking on a tab you are supposed to start an Activity. You simply fire off an Intent. What the Activity you start does and how it looks like is totally up to you.
If you start an Activity through a tab click then the default Android Activity life cycle kicks in which means that you can implement your list updating logic somewhere in onCreate() if appropriate for you.
I highly recommend reading up the articles and tutorials on http://d.android.com as your main problem seems to be that you don't understand how Android is supposed to work.
To create a tabbed UI, you need to use a TabHost and a TabWidget. The TabHost must be the root node for the layout, which contains both the TabWidget for displaying the tabs and a FrameLayout for displaying the tab content.
You can implement your tab content in one of two ways: use the tabs to swap Views within the same Activity, or use the tabs to change between entirely separate activities. Which method you want for your application will depend on your demands, but if each tab provides a distinct user activity, then it probably makes sense to use a separate Activity for each tab, so that you can better manage the application in discrete groups, rather than one massive application and layout.
Maybe this is an outdated version and in higher android versions creating an activity is the cleanest way to accomplish this task, but in the documentation it states that it is also possible to handle Views instead of Activities.
Sadly the documentation only describes the possibility of handling Activites in its tutorial.
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通过单击一个选项卡，您应该启动一个
活动。您只需触发一个Intent即可。您启动的Activity的作用以及它的外观完全取决于您。如果您通过单击选项卡启动
Activity，则默认的 Android Activity 生命周期将启动，这意味着您可以在onCreate()中的某个位置实现列表更新逻辑（如果适用）你。我强烈建议您阅读 http://d.android.com 上的文章和教程，因为您的主要问题似乎是是因为你不明白 Android 应该如何工作。
By clicking on a tab you are supposed to start an
Activity. You simply fire off anIntent. What theActivityyou start does and how it looks like is totally up to you.If you start an
Activitythrough a tab click then the default Android Activity life cycle kicks in which means that you can implement your list updating logic somewhere inonCreate()if appropriate for you.I highly recommend reading up the articles and tutorials on http://d.android.com as your main problem seems to be that you don't understand how Android is supposed to work.
Android 文档位于 http://developer.android.com/resources/ Tutorials/views/hello-tabwidget.html 指出：
也许这是一个过时的版本，在更高的 Android 版本中，创建活动是完成此任务的最干净的方法，但在文档中它指出也可以处理
Views而不是Activities。遗憾的是，该文档仅在其教程中描述了处理 Activites 的可能性。
The android documentation at http://developer.android.com/resources/tutorials/views/hello-tabwidget.html states:
Maybe this is an outdated version and in higher android versions creating an activity is the cleanest way to accomplish this task, but in the documentation it states that it is also possible to handle
Viewsinstead ofActivities.Sadly the documentation only describes the possibility of handling Activites in its tutorial.