PerformException: Error performing 'single click'

Question

I got a error when i run android espresso test:

com.google.android.apps.common.testing.ui.espresso.PerformException: Error performing 'single click' on view 'with id: is <2131034173>'.

My code is easy:

onView(withId(R.id.btn)).perform(click()); 

But there is no error with this code:

onView(withId(R.id.btn)).check(matches(isDisplayed())); 

I can not find the cause why it happen.

Answer 1

The trick is to read the full stack-trace of the error. In the middle, there is some crucial piece of information like this:

Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints: at least 90 percent of the view's area is displayed to the user. Target view: "ImageView{id=2131492903, res-name=button_hamburger, desc=opens the side drawer, visibility=VISIBLE, width=64, height=64, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=false, is-focusable=false, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=6.0, y=6.0}" 

which explains the error in detail.

Answer 2

Try to make sure that the soft keyboard is not showing. It can easily be closed with the closeSoftKeyboard ViewAction.

Moreover, make sure that system animations are disabled. Under Settings -> Developing Options turn off the following:

• Window animation scale
• Transition animation scale
• Animator duration scale

Also, this might be caused by ANR dialogs from other apps.

There's been an issue reported here as well.