fixed error in timestamp format in Android's action class

android/Pictogram/Pictogram.iml

@@ -13,7 +13,7 @@
     <content url="file://$MODULE_DIR$">
       <excludeFolder url="file://$MODULE_DIR$/.gradle" />
     </content>
-    <orderEntry type="jdk" jdkName="1.7" jdkType="JavaSDK" />
+    <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file

android/Pictogram/app/src/main/java/com/yottacode/pictogram/action/Action.java

@@ -43,7 +43,7 @@ public  abstract class Action {
         final String param_id_dev="id_dev";
         final String param_timestamp="timestamp";
         final Date currentTime = new Date();
-        SimpleDateFormat datetime = new SimpleDateFormat("yyyy-MM-ddTHH:mm:ss.SSSZ");
+        SimpleDateFormat datetime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSSZ");
         try {
             JSONObject jsonObject = new JSONObject()
                                                     .put(param_id_stu, PCBcontext.getPcbdb().getCurrentUser().get_id_stu())