Why flutter snackBar not working inside if statement?

Question

I have coded a SnackBar inside the if condition, if the condition is true it has to show SnackBar but it's not happening even when the condition is true.

this is my code

TextButton(
    onPressed: () async {
      await fetch();
      await _scan();
      setState(() {
        total = initial! + last!;
      });
      if (total.toString() == scanResult.rawContent){
        ScaffoldMessenger.of(context).showSnackBar(snackBar)                                 
      }
    },
    child: Text("scan")),

I don't know why it's not working when even the condition is true

final snackBar = SnackBar( duration: Duration(seconds: 20), content: Text('scan again ..'), ); @Yashraj — MOBILES RECOVERY, Aug 06 '22 at 06:53
You need to provide more snippet how you are passing context, means where and how you are showing the snackBar — Md. Yeasin Sheikh, Aug 06 '22 at 07:05
i have just updated the code with the snippet sir, please check and help @Yeasin Sheikh — MOBILES RECOVERY, Aug 06 '22 at 07:20
i have just updated the code with the snippet sir, please check and help @Yashraj — MOBILES RECOVERY, Aug 06 '22 at 07:20
if (total.toString() == scanResult.rawContent) is true then you need to show Snackbar right? — Yashraj, Aug 06 '22 at 07:23

score 0 · Answer 1 · answered Aug 06 '22 at 07:27

0

use ScaffoldMessenger outside the setState

onPressed: () async {
    await fetch();
    await _scan();
  total = initial! + last!;
    setState(() { });      
    if(total.toString() == scanResult.rawContent){
      ScaffoldMessenger.of(context).showSnackBar(snackBar) ;   
     }}

answered Aug 06 '22 at 07:27

Md. Yeasin Sheikh

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still not working bro @Yeasin Sheikh – MOBILES RECOVERY Aug 06 '22 at 07:38
try checking `otal.toString() == scanResult.rawContent` is true – Md. Yeasin Sheikh Aug 06 '22 at 07:46
i tried bro, it's still not working for some reason i dont understand , i tried using a alret dailog box it's too not working @Yeasin Sheikh – MOBILES RECOVERY Aug 06 '22 at 07:53
Can you check if the condition is really true, like do a print state inside the if method – Md. Yeasin Sheikh Aug 06 '22 at 07:54

Why flutter snackBar not working inside if statement?

1 Answers1