Flutter：Connectivity Widget Wrapper Provider 错误

Question

I've added ConnectivityWrapperWidget with my custom offlineWidget. I'm getting this error, while running the app

Error: Could not find the correct Provider above this ConnectivityWidgetWrapper Widget

This likely happens because you used a BuildContext that does not include the provider of your choice. There are a few common scenarios:

• The provider you are trying to read is in a different route.

  Providers are "scoped". So if you insert of provider inside a route, then other routes will not be able to access that provider.

• You used a BuildContext that is an ancestor of the provider you are trying to read.

  Make sure that ConnectivityWidgetWrapper is under your MultiProvider/Provider. This usually happen when you are creating a provider and trying to read it immediately.

  For example, instead of:

   Widget build(BuildContext context) { return Provider<Example>( create: (_) => Example(), // Will throw a ProviderNotFoundError, because `context` is associated // to the widget that is the parent of `Provider<Example>` child: Text(context.watch<Example>()), ), }

  consider using builder like so:

   Widget build(BuildContext context) { return Provider<Example>( create: (_) => Example(), // we use `builder` to obtain a new `BuildContext` that has access to the provider builder: (context) { // No longer throws return Text(context.watch<Example>()), } ), }

I don't get it. Can somebody explain, what is the issue

Answer 1

Try to use builder instead of child, as your error suggests. If it doesn't help, show some code.

Answer 2

在添加 ConnectivityWrapper 时，如果使用自定义的 offlineWidget()，则需要将 ConnectivityAppWrapper 添加为 MaterialApp 的父级。