fix: android back button

README.md

@@ -208,7 +208,11 @@ Open Source Licenses and Acknowledgements are available within the "About" dialo
     </tbody>
 </table>
 
-Special thanks to the [Office of Associate Provost for Innovation and Student Success](https://www.qc.cuny.edu/student-success/), the [International Students and Scholars Office](https://www.qc.cuny.edu/academics/iss/), and the [Office of Student Affairs and Enrollment Management](https://www.qc.cuny.edu/student-affairs-enrollment-management/) at Queens College for their support and guidance.
+Special thanks to the following departments at Queens College for their support and guidance: 
+
+- [Office of Associate Provost for Innovation and Student Success](https://www.qc.cuny.edu/student-success/)
+- [International Students and Scholars Office](https://www.qc.cuny.edu/academics/iss/)
+- [Office of Student Affairs and Enrollment Management](https://www.qc.cuny.edu/student-affairs-enrollment-management/) 
 
 <p align="right">(<a href="#readme-top">back to top</a>)</p>
 

lib/aboutapp.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'package:package_info_plus/package_info_plus.dart';
+import 'package:back_button_interceptor/back_button_interceptor.dart';
 
 class AboutAppPage extends StatefulWidget {
   const AboutAppPage({super.key, required this.title});
@@ -32,11 +33,22 @@ class _AboutAppPageState extends State<AboutAppPage> {
     buildSignature: 'Unknown',
     installerStore: 'Unknown',
   );
+  bool myInterceptor(bool stopDefaultButtonEvent, RouteInfo info) {
+    Navigator.of(context).pop();
+    return true;
+  }
 
   @override
   void initState() {
     super.initState();
     _initPackageInfo();
+    BackButtonInterceptor.add(myInterceptor);
+  }
+
+  @override
+  void dispose() {
+    BackButtonInterceptor.remove(myInterceptor);
+    super.dispose();
   }
 
   Future<void> _initPackageInfo() async {

lib/home.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/cupertino.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_i18n/flutter_i18n.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:url_launcher/url_launcher.dart';
@@ -49,6 +50,20 @@ class CupertinoTabBarDemo extends StatelessWidget {
         CupertinoIcons.profile_circled,
       ),
     ];
+    // set system navigation bar color and icon brightness for android
+    var mySystemTheme =
+        MediaQuery.of(context).platformBrightness == Brightness.light
+            ? SystemUiOverlayStyle.light.copyWith(
+                systemNavigationBarColor:
+                    CupertinoTheme.of(context).barBackgroundColor,
+                systemNavigationBarIconBrightness: Brightness.dark,
+              )
+            : SystemUiOverlayStyle.dark.copyWith(
+                systemNavigationBarColor:
+                    CupertinoTheme.of(context).barBackgroundColor,
+                systemNavigationBarIconBrightness: Brightness.light,
+              );
+    SystemChrome.setSystemUIOverlayStyle(mySystemTheme);
 
     return WillPopScope(
       // forbidden swipe in iOS(my ThemeData(platform: TargetPlatform.iOS,) from onboarding.dart)
@@ -415,6 +430,14 @@ class _MyHomePageState extends State<MyHomePage> {
   bool myInterceptor(bool stopDefaultButtonEvent, RouteInfo info) {
     // navigator pop
     print("BACK BUTTON!"); // Do some stuff.
+    // if there are more than 1 routes, pop
+    if (Navigator.of(context).canPop()) {
+      Navigator.of(context).pop();
+    } else {
+      // if there is only 1 route, exit app
+      SystemChannels.platform.invokeMethod<void>('SystemNavigator.pop');
+      return true;
+    }
     return true;
   }
 

pubspec.yaml

@@ -17,7 +17,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 2.0.0+36
+version: 2.0.0+37
 
 environment:
   sdk: '>=3.1.0 <4.0.0'