CODEWITHSUNDEEP
flutterdart
itslucca
itslucca

Reputation: 93

Method '+' called on null on some devices

I'm getting this error "NoSuchMethodError: The method '+' was called on null. Receiver: null Tried calling: +()"

But on the simulator and my phone, I can see the page perfectly and no error is shown. When other people installed the app on their devices, they get this error. I'm not sure why I can't reproduce it on debugging, but leaves me unsure on what to fix.

This is the only code snippets where I use +

Text(AppLocalizations.of(context).translate("Member since_") + "${timeago.format(user.timestamp.toDate())}",
style: TextStyle(color: Colors.black45))

is it wrong to use + like this to combine strings? It has worked before, and still works on the simulator like I said.

Upvotes: 1

Views: 52

Answers (1)

สรรพสิทธิ์ ศรีแสง
สรรพสิทธิ์ ศรีแสง

Reputation: 524

I think the problem is on ${timeago.format(user.timestamp.toDate())} because this the only varialbe here(Please make sure your JSON translate "Member since_"), Maybe there is null on user.timestamp.toDate() So you should use safe null variable like this:

final String timeRegist = user?.timestamp?.toDate() ?? '';

Text(AppLocalizations.of(context).translate("Member since_") + "$timeRegist )}",
style: TextStyle(color: Colors.black45))

Upvotes: 1

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