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lib/Data.dart

@@ -50,6 +50,14 @@ class Activity{
   DateTime endTime;
   String? metadata;
 
+  Activity.fromJson(Map<String,dynamic> json): taskType=json['taskType'], startTime=json['sTime'], endTime=json['eTime'];
+
+  Map<String, dynamic> toJson()=>{
+    'taskType': taskType,
+    'sTime':startTime,
+    'eTime':endTime
+  };
+
   static String colType = "type";
   static String colStartTime = "s_time";
   static String colEndTime = "e_time";