why flutter application can't connect to internet when install app-release.apk? but normal in debug mode

问题

when in debug mode everything looks good, get response and lists of data from my API. But after I build app-release.apk and install to my phone, it shows no internet connection

here is my code

ScopedModelDescendant<ReportPosViewModel>(
  builder: (context, child, model) {
    return FutureBuilder<List<Invoice>>(
      future: model.invoices,
      builder: (_,
          AsyncSnapshot<List<Invoice>> 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();
                },
              );
            }
        }
      },
    );
  },
),

回答1:

In the AndroidManifest.xml file located at android/app/src/main you need to add this permission in <manifest tag.

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

回答2:

add to android/app/src/main/AndroidManifest.xml after package name

回答3:

If you had put

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

on AndroidManifest.xml

And If it's not working

Try checking connectivity of device. Mobile data or WiFi on android device. Try using chrome browser for google search If it's not working

allow

8.8.8.8

in DNS setting of computer you are using.

来源：https://stackoverflow.com/questions/55603979/why-flutter-application-cant-connect-to-internet-when-install-app-release-apk