public void recordStartTime() {
        PreferenceManager.getDefaultSharedPreferences(BlockCanaryContext.get().provideContext())
                .edit()
                .putLong("BlockCanary_StartTime", System.currentTimeMillis())
                .commit();
    }
Record monitor start time to preference, you may use it when after push which tells start
BlockCanary.
blockcanary-android/src/main/java/com/github/moduth/blockcanary/BlockCanary.java