public void appBecomeActive() {
        synchronized (mTrackTimer) {
            try {
                for (Map.Entry<String, EventTimer> entry : mTrackTimer.entrySet()) {
                    if (entry != null) {
                        EventTimer eventTimer = entry.getValue();
                        if (eventTimer != null) {
                            eventTimer.setStartTime(SystemClock.elapsedRealtime());
                        }
                    }
                }
            } catch (Exception e) {
                SALog.printStackTrace(e);
            }
        }
    }
@Test
    public void appBecomeActive() {
        mInstance.addEventTimer("EventTimer", new EventTimer(TimeUnit.SECONDS, 10000L));
        mInstance.appBecomeActive();
        Assert.assertEquals(100, mInstance.getEventTimer("EventTimer").getStartTime());
    }