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[Solved] Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null

I am trying to run my flutter project But I am facing the following error: Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null in a flutter. So today Here I come with all possible solutions for this error.

We are providing you with all possible solutions to solve this error. let’s start this article without wasting your time.

How Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null Error Occurs?

I am trying to run my flutter project But I am facing the following error:

Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null
Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null
Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null
Error: Method ‘addObserver’ cannot be called on ‘WidgetsBinding?’ because it is potentially null
Error: Method ‘removeObserver’ cannot be called on ‘WidgetsBinding?’ because it is potentially null
Error: Method ‘addPostFrameCallback’ cannot be called on ‘WidgetsBinding?’ because it is potentially null

How To Solve Error: Method ‘addPostFrameCallback’ cannot be called on ‘SchedulerBinding?’ because it is potentially null Error?

  1. How To Solve Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null Error?

    To Solve Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null Error If Solution 1 is not working then Just downgrade your flutter version to v2.10.5. Just run this command in your terminal: flutter downgrade v2.10.5 And, Now Your error must be solved.

  2. Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null

    To Solve Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null Error This error occurred just after Flutter 3.0.0 was Released and also Flutter 3.0.0 release notes say: When migrating to Flutter 3, you might see warnings like the following: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null. and If You are updated Flutter to 3.0.0 version then just run this command in your terminal: dart fix –apply and Hopefully, Your error might be solved. Thanks.

Solution 1: Run dart fix –apply

This error occurred just after Flutter 3.0.0 was Released and also Flutter 3.0.0 release notes say: When migrating to Flutter 3, you might see warnings like the following:

Warning: Operand of null-aware operation ‘!’ has type ‘SchedulerBinding’ which excludes null.

and If You are updated Flutter to 3.0.0 version then just run this command in your terminal.

dart fix --apply

and Hopefully, Your error might be solved. Thanks.

Solution 2: Downgrade Flutter version

If Solution 1 is not working then Just downgrade your flutter version to v2.10.5. Just run this command in your terminal.

flutter downgrade v2.10.5

And, Now Your error must be solved.

Conclusion

So, It’s All About This Error. I hope this tutorial helps you to Solve your error. Please Comment Below if You stucks anywhere with my code. And please comment below on which solution worked for you. Thank You.

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