Espresso：由于“keyDispatchingTimedOut”，仪器运行失败

Question

Below is a section of an espresso test that tries to login to a remote server when a submit button is clicked and then after a successful Login it checks if the view with test " FAQ " is displayed.

 onView(withId(R.id.buttonSubmit)).perform(scrollTo());
 onView(withId(R.id.buttonSubmit)).perform(click());
 onView(withText("FAQ")).check(matches(ViewMatchers.isDisplayed()));

The following error is shown when the button is clicked :

[INFO] emulator-52981_unknown_sdk : Run failed: Instrumentation run failed due to 'keyDispatchingTimedOut'

I would like to know if anybody has an idea of what could be the cause of this error.

Thanks

Answer 1

NOT perform(click()) in UI thread

below code run in instrument test, throw keyDispatchingTimedOut

    try (ActivityScenario<MainActivity> activityScenario
                 = ActivityScenario.launch(MainActivity.class)) {
        activityScenario.onActivity(activity -> {
            onView(withId(R.id.tv1)).perform(click());
        });
    }

change to below code

    try (ActivityScenario<MainActivity> activityScenario
                 = ActivityScenario.launch(MainActivity.class)) {
        onView(withId(R.id.tv1)).perform(click());
    }