public TweetObj(
     String createdAt,
     long id,
     String text,
     String user,
     String screen_name,
     String img,
     boolean isSent) {
   this.createdAt = ProjectUtils.convertDate(createdAt);
   this.id = id;
   this.text = text;
   this.user = user;
   this.screen_name = screen_name;
   this.img = img;
   this.isSent = isSent;
   updateDiff();
 }
 public void updateDiff() {
   this.diffTime = ProjectUtils.getDiffDate(getCreatedAt());
 }