How can I check if the new activity was started

问题

Scenario:

1. The user starts the app
2. The user goes to the "CreateAccountActivity"
3. In order to use the application the user has to enter the email and a password

4. The user clicks "create" which switches to the next activity.

   @Test
   public void createAccountAndLogIn() {
       onView(withId(R.id.login_create)).perform(click());
       onView(withId(R.id.create_email)).perform(clearText(),typeText("xxx@gmail.com"));
       onView(withId(R.id.create_pass)).perform(clearText(),typeText("pass"));
       onView(withId(R.id.create_pass_repeat)).perform(clearText(),typeText("pass"));
       onView(withId(R.id.create_create_button)).perform(click());
   }
   

How to check, after the last line, if the new "MainActivity" was launched?

回答1:

It is possible using ActivityLifecycleMonitor ... However it will not be a "black box" approach that you are looking for.

If you want to go full black box, asserting the view on the next activity should be sufficient enough to pass a test.

Here is the same question that has more detailed explanation.

Is there any way to know if an activity has been started with Espresso?

回答2:

You can control this defining a variable in Application class. When you define a variable in Application class , variable be protected until your app kill and you can reach this variable every class in project. I think it resolves your problem.

回答3:

Have you tried using onResume() method as a quick hack in your MainActivity? Have a boolean variable which changes to true in onResume() and false in onPause().

Cheers, SSG

来源：https://stackoverflow.com/questions/35155638/how-can-i-check-if-the-new-activity-was-started