无意义的优化~

app/src/main/java/com/bgycc/smartcanteen/activity/MainActivity.java

@@ -532,7 +532,7 @@ public class MainActivity extends AppCompatActivity implements View.OnClickListe
     private Runnable updateTimeRunnable = new Runnable() {
         @Override
         public void run() {
-            socketConnectedTime.setText(socketConnectedTimeDateFormat.format(new Date()));
+            socketConnectedTime.setText(socketConnectedTimeDateFormat.format(System.currentTimeMillis()));
             handler.postDelayed(this, 1000);
         }
     };