To test that your example has been successfully added to the samples gallery, you first start a runtime workbench.
为了测试您的样例是否被成功添加到样例库中，首先您需要运行一个运行时工作台。
Rather than building the history stack directly into the photo gallery, we generated a simple page to test our class.
我们没有直接在相册应用程序中建立历史堆栈，而是用一个简单的页面测试这个类。
Before we integrate the history stack with the photo gallery application, we will build a simple page to test the functionality.
在把历史堆栈集成到相册应用程序之前，首先要建立一个简单的页面来测试其功能。
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