Why can't a Flutter application connect to the Internet when installing "app-release.apk"? But it works normally in debug mode

Question

In debug mode, everything looks good. I get answers and data lists from my API. But after creating app-release.apk and installing it on my phone, there isn't an Internet connection any more.

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();
                  },
                );
              }
          }
      },
    );
  },
),

CopsOnRoad · Accepted Answer · 2023-04-13 14:40:30Z

291

Open the AndroidManifest.xml file located at <your_project>/android/app/src/main and add the following line:

<manifest xmlns:android="...">
  <uses-permission android:name="android.permission.INTERNET"/> <!-- Add this -->
</manifest>

From here:

Add the android.permission.INTERNET permission if your application code needs Internet access. The standard template does not include this tag but allows Internet access during development to enable communication between Flutter tools and a running app.

edited Apr 13, 2023 at 14:40

answered Apr 10, 2019 at 6:33

CopsOnRoad

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13 Comments

Soon Santos Over a year ago

No changes necessary for iOS?

CopsOnRoad Over a year ago

@SoonSantos yes no changes needed for iOS.

john Over a year ago

is this necessary for flutter too??it is flutter and not java project,I used this but does not work yet

CopsOnRoad Over a year ago

@john This isn't like Flutter or Java, rather it's for Android. And for an Android project it is necessary to use it.

CopsOnRoad Over a year ago

@RayCoder Profile won't do the work for release, you need to put it in a place mentioned in the answer.

|

Peter Mortensen · Accepted Answer · 2021-04-21 19:25:19Z

29

If you had put

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

in AndroidManifest.xml

And if it's not working, try checking the connectivity of the device. Mobile data or Wi-Fi on the Android device. Try using the Google Chrome browser for Google Search.

If it's not working, allow

8.8.8.8

in the DNS setting of the computer you are using.

edited Apr 21, 2021 at 19:25

Peter Mortensen

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answered Nov 25, 2019 at 18:08

Aseem

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5 Comments

Rahman Rezaee Over a year ago

I add to manifest internet permission but network not work, I also test in google and other browser it work. just in application not work . but its work in debug and release mode when I get aab not work

justin0060 Over a year ago

Did you find a solution for it? @RahmanRezaee

mekdigital Over a year ago

<3 try checking the connectivity of the device

Don Over a year ago

After adding the permission and stil doesnt work try reinstalling the app again, I did that and it worked.

Houari Over a year ago

Same, i had already that persmission set, but did not work. In debug mode everything working pefectly. but after downloading it from playstore, i had SocketException: failed host lookup

CopsOnRoad · Accepted Answer · 2021-06-18 17:36:52Z

23

Add this to file android/app/src/main/AndroidManifest.xml after the package name:

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

edited Jun 18, 2021 at 17:36

CopsOnRoad

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answered Apr 10, 2019 at 3:39

bimasakti

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Comments

CopsOnRoad · Accepted Answer · 2023-04-13 14:44:45Z

8

Add these in Android Manifest file.

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

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

Then run:

flutter clean
flutter pub get
flutter run

edited Apr 13, 2023 at 14:44

CopsOnRoad

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answered Mar 7, 2023 at 5:04

Yash Raj Mani

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Comments

null_override · Accepted Answer · 2021-10-05 09:43:50Z

1

For my project, which uses Firebase, downloading the updated google-services.json from firebase console solved the issue.

answered Oct 5, 2021 at 9:43

null_override

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