使用问题中的当前Activity实现，即，通过单击ChildActivity中的按钮设置结果，然后立即销毁该活动，在ChildActivityTest中我们无法做很多测试结果相关的东西。
相关问题测试onActivityResult（）的答案显示了如何在MainActivityTest中独立测试startActivityForResult（）和/或onActivityResult（）。通过独立方式，MainActivityTest不依赖于ChildActivity的交互，检测将捕获ChildActivity的创建并立即将其杀死，然后返回准备好的烘焙模拟ActivityResult，从而对MainActivity进行单元测试。
如果您不希望检测中断并返回模拟的ActivityResult，则可以让ChildActivity继续进行，然后在ChildActivity中模拟交互，然后将实际的ActivityResult返回给MainActivity。说如果您要MainActivity启动ChildActivity作为结果，然后更新TextView，以测试整个端到端的交互/合作，请参见下面的示例代码：
public class MainActivityTest extends ActivityInstrumentationTestCase2<MainActivity> { ... ... public void testStartActivityForResult() { MainActivity mainActivity = getActivity(); assertNotNull(activity); // Check initial value in TextView: TextView text = (TextView) mainActivity.findViewById(com.example.R.id.textview1); assertEquals(text.getText(), "default vaule"); try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } // Create an ActivityMonitor that monitor ChildActivity, do not interrupt, do not return mock result: Instrumentation.ActivityMonitor activityMonitor = getInstrumentation().addMonitor(ChildActivity.class.getName(), null , false); // Simulate a button click in MainActivity that start ChildActivity for result: final Button button = (Button) mainActivity.findViewById(com.example.R.id.button1); mainActivity.runonUiThread(new Runnable() { public void run() { button.performClick(); } }); try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } getInstrumentation().waitForIdleSync(); ChildActivity childActivity = (ChildActivity) getInstrumentation().waitForMonitorWithTimeout(activityMonitor, 5); // ChildActivity is created and gain focus on screen: assertNotNull(childActivity); // Simulate a button click in ChildActivity that set result and finish ChildActivity: final Button button2 = (Button) childActivity.findViewById(com.example.R.id.button1); childActivity.runonUiThread(new Runnable() { public void run() { button2.performClick(); } }); try { Thread.sleep(2000); } catch (InterruptedException e) { e.printStackTrace(); } getInstrumentation().waitForIdleSync(); // TextView in MainActivity should be changed: assertEquals(text.getText(), "default value changed"); } ... ...}我在这里添加了三个Thread.sleep（）调用，以便您有机会在运行JUnit Test时看到单击模拟的按钮。如您在这里看到的那样，一个独立的ChildActivityTest不足以测试整个合作，实际上我们是通过MainActivityTest间接测试ChildActivity.setResult（）的，因为我们从一开始就需要模拟整个交互。
