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 · Answer 1 · 2023-04-13T14:40:30.740

253

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 '23 at 14:40

answered Apr 10 '19 at 06:33

CopsOnRoad

237,138
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5

No changes necessary for iOS? – Soon Santos Oct 09 '19 at 23:37
19

@SoonSantos yes no changes needed for iOS. – CopsOnRoad Oct 10 '19 at 04:13
1

is this necessary for flutter too??it is flutter and not java project,I used this but does not work yet – john Oct 24 '19 at 21:31
5

@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 Oct 25 '19 at 06:07
I think in debug mode we dont have to use this,but I add it to manifest but still does not work.I tested it last night and it was ok but now it does not work agian!!! – john Oct 25 '19 at 10:18
I have put permission in profile. Should i put it in main androidmanifest? – Ray Coder Mar 27 '20 at 23:17
3

@RayCoder Profile won't do the work for release, you need to put it in a place mentioned in the answer. – CopsOnRoad Mar 28 '20 at 06:39
Just inserting didn't work for me. Run/debug app required before taking build – Vipin Krishna Sep 15 '21 at 10:16
Important note: `uses-permission` comes directly under `manifest` but not inside `application`. Like ``. The official documentation about that can be found over here https://flutter.dev/docs/development/data-and-backend/networking – Imran Zahoor Nov 09 '21 at 18:45
@ImranZahoor It's already put directly under the `manifest` tag in the answer. – CopsOnRoad Nov 10 '21 at 15:57
While doing this, it created confusion for me, so shared this, so others can took benefit from it. For me the example shared on flutter link was more clearer :) – Imran Zahoor Nov 10 '21 at 16:00
I know it's not that relevant, but your closing tag says `maniFAST` instead of `manifest`. Gotta go FAST! – Marwin Lebensky Feb 16 '22 at 17:12
@MarwinLebensky Haha, thanks for pointing that out, I updated the post. – CopsOnRoad Feb 19 '22 at 18:24

score 26 · Answer 2 · edited Apr 21 '21 at 19:25

26

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 '21 at 19:25

Peter Mortensen

30,738
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131

answered Nov 25 '19 at 18:08

Aseem

261
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4

2

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 – Rahman Rezaee Jan 20 '21 at 03:48
Did you find a solution for it? @RahmanRezaee – justin0060 Feb 02 '21 at 10:02
<3 try checking the connectivity of the device – mekdigital Dec 06 '21 at 22:45
After adding the permission and stil doesnt work try reinstalling the app again, I did that and it worked. – Don May 29 '23 at 13:47

score 19 · Answer 3 · edited Jun 18 '21 at 17:36

19

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

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

edited Jun 18 '21 at 17:36

CopsOnRoad

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answered Apr 10 '19 at 03:39

bimasakti

1,369
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score 3 · Answer 4 · edited Apr 13 '23 at 14:44

3

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 '23 at 14:44

CopsOnRoad

237,138
77
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answered Mar 07 '23 at 05:04

Yash Raj Mani

51
3

score 1 · Answer 5 · answered Oct 05 '21 at 09:43

1

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

answered Oct 05 '21 at 09:43

null_override

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

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