CODEWITHSUNDEEP
flutter
Santosh Kumar
Santosh Kumar

Reputation: 206

Flutter: Widgets are missing in release build and showing grey screen

in one of my Flutter files I have this code that theoretically doesn't seem it should be a problem to run at all. It renders nicely in the debug version but when I build a release iOS and Android app files, it becomes partly invisible. There's a widget inside listview.builder which renders CheckboxListTile. yet this one doesn't render and neither does any widget afterwards.Console is not showing any errors Following is the widget where I face error

ListView.builder(
                      physics: const ScrollPhysics(parent: null),
                      shrinkWrap: true,
                      itemBuilder: (cont, index) {
                        return CheckboxListTile(
                          value: value.selected_box.contains(index),
                          onChanged: (val) {
                            // print(val);
                            value.selectedCat(value.categories![index]['id']);
                            value.update(index);
                          },
                          title: Text(value.categories![index]['title']),
                        );
                      },
                      itemCount: value.categories!.length,
                    );

enter image description here

above image is from release mode below is the expected result in release mode enter image description here

Upvotes: 0

Views: 787

Answers (2)

Shahed Oali Noor
Shahed Oali Noor

Reputation: 654

change your main.dart as below:

void main() async {
    WidgetsFlutterBinding.ensureInitialized();
    await Future.delayed(Duration(milliseconds: 1000));
     // I added 1000 ms, but I guess less than 1000 ms will also work.
    runApp(App());
}

Upvotes: 0

Fabián Bardecio
Fabián Bardecio

Reputation: 259

If you see a grey screen after building your app, it means there is some error on it. The grey screen is the very same red screen with yellow letters that you can see while debugging your app, but on some occasions, this red screen is not displayed since the error does not break the app in debug, but it does break the app after a build.

Therefore you should check your logs in debug, you are probably missing an error that does not break your app in debug, but it does in the release.

Upvotes: 3

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