AndroidTest instrumentation: Check if activity is was launched

ActivityTest.java

        Instrumentation.ActivityMonitor activityBackMonitor = getInstrumentation().addMonitor(StationsActivity.class.getName(), null, false);

//CHECK IF ACTIVITY IS LAUNCHED
        StationDetailActivity nextActivity = (StationDetailActivity) getInstrumentation().waitForMonitorWithTimeout(activityMonitor, 5000);
        // next activity is opened and captured.
        assertNotNull(nextActivity);
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }