Wait until the UI thread becomes idle

[paulohvalipio]

Hi,

It would be very interesting to add functionality to wait until the UI thread becomes idle similar to the mobile command: waitForUIThread from the appium-espresso-driver or a capability appium:waitForUIThread, this functionality is necessary to avoid the use of implicit waiting that can impact the performance of test case execution.

[mykola-mokhnach]

Do you known any UIAutomator APIs that would allow this? I have doubts it is possible because Espresso is very different from UIA2. The latter relies merely on system accessibility and is a black box solution, while Espresso has access to the app code and its code execution sandbox.