Flutter Connectivity_plus Not Updating GetX Observable On WiFi Toggle

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Introduction

As a developer, managing internet connectivity across your app is crucial for providing a seamless user experience. In this article, we will explore the issue of Flutter's connectivity_plus package not updating the GetX observable when toggling WiFi on or off. We will delve into the possible causes and provide a step-by-step solution to resolve this issue.

Problem Statement

When using Flutter with connectivity_plus and GetX to manage internet connectivity globally across your app, you may encounter an issue where the .isConnected observable does not update when toggling WiFi on or off. This can lead to inconsistent behavior and affect the overall user experience.

Possible Causes

Before we dive into the solution, let's explore the possible causes of this issue:

  • Insufficient permissions: Ensure that your app has the necessary permissions to access the device's WiFi settings.
  • Incorrect package versions: Verify that you are using the latest versions of connectivity_plus and GetX.
  • Observer not updated: Check if the observer is properly updated when the WiFi state changes.
  • Async operation: The WiFi toggle operation might be asynchronous, causing the observable to not update immediately.

Step-by-Step Solution

To resolve the issue, follow these steps:

Step 1: Verify Permissions

Ensure that your app has the necessary permissions to access the device's WiFi settings. You can do this by adding the following code to your AndroidManifest.xml file:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

Step 2: Update Package Versions

Verify that you are using the latest versions of connectivity_plus and GetX. You can update the packages by running the following commands in your terminal:

flutter pub upgrade connectivity_plus
flutter pub upgrade getx

Step 3: Update Observer

Check if the observer is properly updated when the WiFi state changes. You can do this by adding a StreamBuilder to your widget tree to listen for changes in the WiFi state:

StreamBuilder<ConnectivityResult>(
  stream: Connectivity().onConnectivityChanged,
  builder: (context, snapshot) {
    if (snapshot.hasData) {
      return Text('Connected: ${snapshot.data}');
    } else {
      return Text('No connection');
    }
  },
)

Step 4: Handle Async Operation

The WiFi toggle operation might be asynchronous, causing the observable to not update immediately. You can handle this by using a FutureBuilder to wait for the WiFi state to change:

FutureBuilder<bool>(
  future: _toggleWiFi(),
  builder: (context, snapshot) {
    if (snapshot.hasData) {
      return Text('WiFi toggled: ${snapshot.data}');
    } else {
      return Text('Toggling WiFi...');
    }
  },
)

Step 5: Update GetX Observable

Finally, update the GetX observable when the WiFi state changes. You can do this by using the Rx library to create a stream that updates the observable```dart import 'package:get/get.dart'; import 'package:connectivity_plus/connectivity_plus.dart';

class ConnectivityController extends GetxController { final _connectivity = Connectivity();

@override void onInit() { super.onInit(); _connectivity.onConnectivityChanged.listen((event) { updateIsConnected(event); }); }

void updateIsConnected(ConnectivityResult event) { if (event == ConnectivityResult.wifi) { _isConnected.value = true; } else { _isConnected.value = false; } }

final _isConnected = Rx(false);

bool get isConnected => _isConnected.value; }


**Conclusion**
----------

In this article, we explored the issue of Flutter's connectivity_plus package not updating the GetX observable when toggling WiFi on or off. We delved into the possible causes and provided a step-by-step solution to resolve this issue. By following these steps, you should be able to update the GetX observable when the WiFi state changes, ensuring a seamless user experience across your app.


Example Use Case


Here's an example use case where you can use the ConnectivityController to update the GetX observable when the WiFi state changes:


class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: &#39;My App&#39;,
      home: Scaffold(
        appBar: AppBar(
          title: Text(&#39;My App&#39;),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text(&#39;Connected: ${Get.find&lt;ConnectivityController&gt;().isConnected}&#39;),
              ElevatedButton(
                onPressed: () async {
                  await Get.find&lt;ConnectivityController&gt;().toggleWiFi();
                },
                child: Text(&#39;Toggle WiFi&#39;),
              ),
            ],
          ),
        ),
      ),
    );
  }
}
</code></pre>
<code></code><code></code><code></code><code></code><code></code>

<h2><strong>Introduction</strong></h2>
<p>In our previous article, we explored the issue of Flutter's <code>connectivity_plus</code> package not updating the <code>GetX</code> observable when toggling WiFi on or off. We provided a step-by-step solution to resolve this issue. In this article, we will answer some frequently asked questions (FAQs) related to this topic.</p>
<h2><strong>Q: What are the possible causes of this issue?</strong></h2>
<p>A: The possible causes of this issue include:</p>
<ul>
<li><strong>Insufficient permissions</strong>: Ensure that your app has the necessary permissions to access the device's WiFi settings.</li>
<li><strong>Incorrect package versions</strong>: Verify that you are using the latest versions of <code>connectivity_plus</code> and <code>GetX</code>.</li>
<li><strong>Observer not updated</strong>: Check if the observer is properly updated when the WiFi state changes.</li>
<li><strong>Async operation</strong>: The WiFi toggle operation might be asynchronous, causing the observable to not update immediately.</li>
</ul>
<h2><strong>Q: How do I verify permissions?</strong></h2>
<p>A: To verify permissions, add the following code to your <code>AndroidManifest.xml</code> file:</p>
<pre><code class="hljs">&lt;uses-permission android:name=&quot;android.permission.ACCESS_WIFI_STATE&quot; /&gt;
&lt;uses-permission android:name=&quot;android.permission.CHANGE_WIFI_STATE&quot; /&gt;
</code></pre>
<h2><strong>Q: How do I update package versions?</strong></h2>
<p>A: To update package versions, run the following commands in your terminal:</p>
<pre><code class="hljs">flutter pub upgrade connectivity_plus
flutter pub upgrade getx
</code></pre>
<h2><strong>Q: How do I update the observer?</strong></h2>
<p>A: To update the observer, add a <code>StreamBuilder</code> to your widget tree to listen for changes in the WiFi state:</p>
<pre><code class="hljs">StreamBuilder&lt;ConnectivityResult&gt;(
  stream: Connectivity().onConnectivityChanged,
  builder: (context, snapshot) {
    if (snapshot.hasData) {
      return Text(&#39;Connected: ${snapshot.data}&#39;);
    } else {
      return Text(&#39;No connection&#39;);
    }
  },
)
</code></pre>
<h2><strong>Q: How do I handle async operation?</strong></h2>
<p>A: To handle async operation, use a <code>FutureBuilder</code> to wait for the WiFi state to change:</p>
<pre><code class="hljs">FutureBuilder&lt;bool&gt;(
  future: _toggleWiFi(),
  builder: (context, snapshot) {
    if (snapshot.hasData) {
      return Text(&#39;WiFi toggled: ${snapshot.data}&#39;);
    } else {
      return Text(&#39;Toggling WiFi...&#39;);
    }
  },
)
</code></pre>
<h2><strong>Q: How do I update GetX observable?</strong></h2>
<p>A: To update the <code>GetX</code> observable, use the <code>Rx</code> library to create a stream that updates the observable:</p>
<pre><code class="hljs">import &#39;package:get/get.dart&#39;;
import &#39;package:connectivity_plus/connectivity_plus.dart&#39;;

class ConnectivityController extends GetxController {
  final _connectivity = Connectivity();

  @override
  void onInit() {
    super.onInit();
    _connectivity.onConnectivityChanged.listen((event) {
      updateIsConnected(event);
    });
  }

  void updateIsConnected(ConnectivityResult event) {
    if (event == ConnectivityResult.wifi) {
      _isConnected.value = true;
    } else {
      _isConnected.value = false;
    }
  }

  final _isConnected = Rx&lt;bool&gt;(false);

  bool get isConnected =&gt; _isConnected.value;
}
</code></pre>
<h2><strong>Q: Can I use this solution in my production app?</strong></h2>
<p>A: Yes, you can use this solution in your production app. However, make sure to test it thoroughly to ensure that it works as expected.</p>
<h2><strong>Q: Are there any other solutions to this issue?</strong></h2>
<p>A: Yes, there are other solutions to this issue. You can use the <code>connectivity</code> package instead of <code>connectivity_plus</code>. You can also use the <code>flutter_connectivity</code> package.</p>
<h2><strong>Conclusion</strong></h2>
<p>In this article, we answered some frequently asked questions related to the issue of Flutter's <code>connectivity_plus</code> package not updating the <code>GetX</code> observable when toggling WiFi on or off. We provided a step-by-step solution to resolve this issue and discussed some alternative solutions. By following these steps, you should be able to update the <code>GetX</code> observable when the WiFi state changes, ensuring a seamless user experience across your app.</p>