CODEWITHSUNDEEP
dartflutter
Ravindra Bhanderi
Ravindra Bhanderi

Reputation: 2936

Package:flutter/src/widgets/overlay.dart': Failed assertion: line 133 pos 12: '_overlay != null':

entry is a instance of OverlayEntry class

entry?.remove();

Error 

Package:flutter/src/widgets/overlay.dart': Failed assertion: line 133 pos 12: '_overlay != null':

Upvotes: 17

Views: 14883

Answers (4)

saigopi.me
saigopi.me

Reputation: 14938

try this, it is working for me

 if (overlayEntry != null && overlayEntry.mounted) {
  overlayEntry?.remove();
  overlayEntry = null;
}

Upvotes: 9

David Kiarie Macharia
David Kiarie Macharia

Reputation: 289

You can check if the overlay is mounted like this

  if (floatingDropdown?.mounted ?? false) {
    floatingDropdown?.remove();
  }

Upvotes: 2

Ravindra Bhanderi
Ravindra Bhanderi

Reputation: 2936

Resolved

After lots of research a try I found below a simple solution.

entry?.remove();
entry = null;

Upvotes: 21

halface_sun
halface_sun

Reputation: 429

If there is no OverlayEntry inserted to the Overlay and you try to call the remove method, you will get that error: Failed assertion: '_overlay != null'. So before removing the entry, add a condition to judge whether it is legal or not. It's more like a hack code, you can add a variable like isEntryNotNull for convenience and understandable as well. And when you insert a new OverlayEntry into Overlay, reassign it to the entry variable, then the condition will work fine.

if (entry != null) {
  entry.remove();
  entry = null;
}

Upvotes: 15

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