gistfile1.java

    /** Perform action of waiting for a specific view id. */
    public static ViewAction waitForId(final int viewId, final long millis) {
        return new ViewAction() {
            @Override
            public Matcher<View> getConstraints() {
                return isDisplayed();
            }

            @Override
            public String getDescription() {
                return "waited for a specific view with id <" + viewId + "> for " + millis + " millis.";
            }

            @Override
            public void perform(final UiController uiController, final View view) {
                uiController.loopMainThreadUntilIdle();
                final long startTime = System.currentTimeMillis();
                final long endTime = startTime + millis;

                do {
                    uiController.loopMainThreadForAtLeast(100);
                }
                while (System.currentTimeMillis() < endTime);
            }
        };
    }