blocks|key|161386|text|我尝试过shared_preferences:+"0.2.4"和上面提到的其他版本，但都没有成功。最后，在将颤振通道从dev更改为beta之后，它终于开始工作了：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|161387|flutter+channel+beta|code-block|syntax|javascript|161388|至少，这暂时解决了这个问题，只需等待对dev通道上的shared_preferences插件进行修复。|161389|entityMap^0|4|R|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

I've tried <code>shared_preferences: "0.2.4"</code> and other versions suggested above without any success. Finally got it to work after changing flutter channel from dev to beta:

<pre><code>flutter channel beta
</code></pre>

At least this fixes this problem for now and just wait for a fix for the shared_preferences plugin on the dev channel.

blocks|key|937746|text|我通过更改为shared_preferences:+"0.3.3"来修复它。这很有可能再次打破。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|937747|entityMap^0|6|R|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I fixed it by changing to <code>shared_preferences: &quot;0.3.3&quot;</code>. There is a good chance this breaks again.

blocks|key|934093|text|你需要像这样使用未来|type|unstyled|depth|inlineStyleRanges|entityRanges|data|934094|Future<SharedPreferences>+_sprefs+=+SharedPreferences.getInstance();|code-block|syntax|javascript|934095|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

you need to use Future like this

<pre><code>Future&lt;SharedPreferences&gt; _sprefs = SharedPreferences.getInstance();
</code></pre>

blocks|key|2827823|text|我使用以下解决方法解决了这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2827824|Future<SharedPreferences>+prefs+=+SharedPreferences.getInstance();
prefs.then(
++(pref)
++{
++++//call+functions+like+pref.getInt(),+etc.+here
++}
);|code-block|syntax|javascript|2827825|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I solved this using the following workaround:
<pre><code>Future&lt;SharedPreferences&gt; prefs = SharedPreferences.getInstance();
prefs.then(
 (pref)
 {
 //call functions like pref.getInt(), etc. here
 }
);
</code></pre>

blocks|key|161471|text|要调试这一点，请使用以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|161472|Future<SharedPreferences>+_sprefs+=+SharedPreferences.getInstance();
_sprefs.then((prefs)+{
++//+...
},+
onError:+(error)+{
++print("SharedPreferences+ERROR+=+$error");+++
});|code-block|syntax|javascript|161473|在我的例子中，错误是我想在调用await+SharedPreferences.getInstance()之前调用runApp()，因此错误消息给我的解决方案是按如下顺序排列我的代码：|offset|length|style|CODE|161474|第一：|161475|WidgetsFlutterBinding.ensureInitialized();|161476|之后：|161477|SharedPreferences+prefs+=+await+SharedPreferences.getInstance();|161478|最后：|161479|runApp(...);|161480|entityMap^0|0|0|F|11|1K|8|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@$I|13|J|14|K|L]|$I|15|J|16|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|18|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|1A|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|1B|8|@]|9|@]|A|$]]|$1|W|3|X|5|D|7|1C|8|@]|9|@]|A|$E|F]]|$1|Y|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|Z|$]]

To debug this, use the following:
<pre><code>Future&lt;SharedPreferences&gt; _sprefs = SharedPreferences.getInstance();
_sprefs.then((prefs) {
 // ...
}, 
onError: (error) {
 print(&quot;SharedPreferences ERROR = $error&quot;); 
});
</code></pre>
In my case the error was that I wanted to call <code>await SharedPreferences.getInstance()</code> before I called <code>runApp()</code>, so that solution the error message gave me was to order my code as follows:
First:
<pre><code>WidgetsFlutterBinding.ensureInitialized();
</code></pre>
Afterwards:
<pre><code>SharedPreferences prefs = await SharedPreferences.getInstance();
</code></pre>
Finally:
<pre><code>runApp(...);
</code></pre>

blocks|key|937789|text|我一个一个地删除包，发现它是由flutter_barcode_scanner引起的。我把它升级到2.0.0版本，它解决了我的问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|937790|entityMap^0|F|N|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I remove packages one by one, and found that it was caused by <code>flutter_barcode_scanner</code>. I upgraded it to version 2.0.0 and it solved my problem.

I was using <code>shared_preferences</code> plugin in my Flutter application. From one moment (probably after Flutter upgrade), it started to throw an exception:

<pre><code>E/flutter (27778): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter (27778): type '_InternalLinkedHashMap' is not a subtype of type 'Map&lt;String, Object&gt;' where
E/flutter (27778): _InternalLinkedHashMap is from dart:collection
E/flutter (27778): Map is from dart:core
E/flutter (27778): String is from dart:core
E/flutter (27778): Object is from dart:core
E/flutter (27778): 
E/flutter (27778): #0 SharedPreferences.getInstance (package:shared_preferences/shared_preferences.dart)
E/flutter (27778): &lt;asynchronous suspension&gt;
E/flutter (27778): #1 loadFirstUse (**path**/lib/main.dart:29:53)
E/flutter (27778): &lt;asynchronous suspension&gt;
E/flutter (27778): #2 main (**path**/lib/main.dart:17:9)
E/flutter (27778): &lt;asynchronous suspension&gt;
E/flutter (27778): #3 _startIsolate.&lt;anonymous closure&gt; (dart:isolate/runtime/libisolate_patch.dart:279:19)
E/flutter (27778): #4 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:165:12)
</code></pre>

It happens when I simple try to create instance of SharedPreferences: 

<pre><code>SharedPreferences prefs = await SharedPreferences.getInstance();
</code></pre>

I was trying to find root of the problem, but was unable to find it. Thank you for any help.

EDIT: I am using <code>shared_preferences: "^0.4.0"</code>

SharedPreferences error in Flutter

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在我的颤振应用程序中使用了shared_preferences插件。从一开始(可能在颤振升级之后)，它就开始抛出一个异常：E/flutter (27778): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:E/flutter...

问颤振中的SharedPreferences误差
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