看起来你正在尝试创建一个检测单元测试，因为你想要创建它位于androidTest文件夹中。

It looks like you're trying to create an instrumented unit test, since you want to create it in the androidTest folder.

您可以在测试中使用这两行中的一行来获取上下文：

You can use one of these two lines in your test to get the context:

• 上下文ctx = InstrumentationRegistry.getTargetContext（）;
  这个将为您提供应用程序的上下文。您可以使用它来获取src / main / assets中的资产。

• Context ctx = InstrumentationRegistry.getTargetContext(); this one will give you your app's context. You can use it to grab assets that are in src/main/assets for example.

上下文ctx = InstrumentationRegistry.getContext（）;
这个将为您提供测试应用程序的上下文。您可以使用它来获取src / androidTest / assets

Context ctx = InstrumentationRegistry.getContext(); this one will give you the test app's context. You can use it to grab assets that are in src/androidTest/assets

中的资产如果您想了解有关单元测试资产的更多信息，可以阅读此帖子。在此github文件中你有一个例子。

If you want to know more about assets in unit testing you can read this post. In this github file you have an example.