Debug mode / Release APK

[florianjs]

Hi,

In debug mode, using VC Studio, the plugin is working as expected: the function is running when the back button is pressed. But when I build the app, the function is not running anymore. (Back Button is disabled, but it doesn't launch the function onPressed)

I tried to flutter clean and create a new build but I got the same issue. Some special permission is needed in the Manifest?

[florianjs]

I use the rflutter_alert 1.0.2 to show a dialog box when the user click on the back button:

bool myInterceptor(bool stopDefaultButtonEvent) { //TODO apk-release : back button don't work print("BACK BUTTON!"); // Do some stuff. Alert( context: context, title: "Do you want to close the app?", buttons: [ DialogButton( onPressed: () { Navigator.pop(context); exit(0); }, child: Text("Yes", style: TextStyle(fontWeight: FontWeight.bold, color: Colors.white),), ), DialogButton(onPressed: (){ Navigator.pop(context); }, child: Text('No', style: TextStyle(fontWeight: FontWeight.bold, color: Colors.white),),) ], ).show(); return false; }

[marcglasberg]

Could you please include your flutter doctor?

[florianjs]

@marcglasberg

Doctor summary (to see all details, run flutter doctor -v): [√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [version 10.0.18362.175], locale fr-FR)

[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3) [√] Android Studio (version 3.4) [√] VS Code (version 1.35.1) [!] Connected device ! No devices available

! Doctor found issues in 1 category.

[marcglasberg]

@Icesofty You are not using this package as you should. You are not supposed to return false, but true instead, since you want the BackButtonInterceptor to stop the default button event. The package rflutter_alert is preventing the app from closing somehow. That's why your code worked (at least in debug), but it was not supposed to. I'd suggest you re-read the back_button_interceptor documentation carefully. Thank you.