title: Why can't a Flutter application connect to the Internet when installing "app-release.apk"? But it works normally in debug mode
body: <p>In debug mode, everything looks good. I get answers and data lists from my API. But after creating <em>app-release.apk</em> and installing it on my phone, there isn't an Internet connection any more.</p>
  <p>Here is my code:</p>
  <pre><code>ScopedModelDescendant&lt;ReportPosViewModel&gt;(
    builder: (context, child, model) {
      return FutureBuilder&lt;List&lt;Invoice&gt;&gt;(
        future: model.invoices,
        builder: (_,
          AsyncSnapshot&lt;List&lt;Invoice&gt;&gt; snapshot) {
            switch (snapshot.connectionState) {
              case ConnectionState.none:
              case ConnectionState.active:
              case ConnectionState.waiting:
                return Center(
                  child:
                    const CircularProgressIndicator());
              case ConnectionState.done:
                if (snapshot.hasData) {
                  // Something todo
                }
                else if (snapshot.hasError) {
                  return NoInternetConnection(
                    action: () async {
                      await model.setInvoice();
                      await getData();
                    },
                  );
                }
            }
        },
      );
    },
  ),
  </code></pre>