好的，我刚刚开始进入Android的程序，现在，我下面的机器人TabActivity教程：的 http://developer.android.com/reference/android/app/TabActivity.html 。 逝去的工作，但它似乎无法找到一些支持类的，请参见下面的code正在生成错误。

Ok i'm just starting to get into Android programming now, and I'm following the android "TabActivity" tutorial: http://developer.android.com/reference/android/app/TabActivity.html. Everythings working but it can't seem to find some of the support classes, see the code below that is generating the errors.

    mTabManager.addTab(mTabHost.newTabSpec("simple").setIndicator("Simple"),
            FragmentStackSupport.CountingFragment.class, null);
    mTabManager.addTab(mTabHost.newTabSpec("contacts").setIndicator("Contacts"),
            LoaderCursorSupport.CursorLoaderListFragment.class, null);
    mTabManager.addTab(mTabHost.newTabSpec("custom").setIndicator("Custom"), 
            LoaderCustomSupport.AppListFragment.class, null);
    mTabManager.addTab(mTabHost.newTabSpec("throttle").setIndicator("Throttle"),
            LoaderThrottleSupport.ThrottledLoaderListFragment.class,null);

有关FragmentStackSupport / LoaderCursorSupport / LoaderCustomSupport / LoaderThrottleSupport，它说，对所有的人都无法解析为一个类型。我已经添加了最新的支持库名为库的根目录的文件夹，也coppied成C：/ Eclipse中/ V4 /目录下。我的导入文件是：

For FragmentStackSupport/LoaderCursorSupport/LoaderCustomSupport/LoaderThrottleSupport, it says for all of them cannot be resolved to a type. I've added the latest support library to a folder in the root directory named "libs" and also coppied it into "C:/Eclipse/v4/" directory. My import files are:

    import java.util.HashMap;
    import android.R;
    import android.content.Context;
    import android.os.Bundle;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentActivity;
    import android.support.v4.app.FragmentTransaction;
    import android.support.v4.app.FragmentPagerAdapter;
    import android.view.View;
    import android.widget.TabHost;
    import cowdawg.hello_tab.namespace.R.layout;
    import cowdawg.hello_tab.namespace.R.id;

可能有人请我提供关于如何解决这方面的一些建议，谢谢。）

Could someone please offer me some advice on how to solve this, thanks :).

推荐答案

这可能是因为下列类不是标准的Andr​​oid API（或支持库）的一部分，但只存在于支持演示示例code出于演示的目的：

It's probably because the following classes are not part of the standard Android API (or the support library), but only exist in the support demos sample code for demonstration purposes:

FragmentStackSupport.CountingFragment
LoaderCursorSupport.CursorLoaderListFragment
LoaderCustomSupport.AppListFragment
LoaderThrottleSupport.ThrottledLoaderListFragment

您需要将这些类添加到您自己的项目，以便能够使用它们。 Here你可以找到在小节文件的源文件。

You will need to add these classes to your own project in order to be able to use them. Here you can find the source files under the subsection 'Files'.