notification_permissions 0.6.1

A plugin to check and ask for notification permissions on Android and iOS

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:notification_permissions/notification_permissions.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
  Future<String> permissionStatusFuture;

  var permGranted = "granted";
  var permDenied = "denied";
  var permUnknown = "unknown";
  var permProvisional = "provisional";

  @override
  void initState() {
    super.initState();
    // set up the notification permissions class
    // set up the future to fetch the notification data
    permissionStatusFuture = getCheckNotificationPermStatus();
    // With this, we will be able to check if the permission is granted or not
    // when returning to the application
    WidgetsBinding.instance.addObserver(this);
  }

  /// When the application has a resumed status, check for the permission
  /// status
  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state == AppLifecycleState.resumed) {
      setState(() {
        permissionStatusFuture = getCheckNotificationPermStatus();
      });
    }
  }

  /// Checks the notification permission status
  Future<String> getCheckNotificationPermStatus() {
    return NotificationPermissions.getNotificationPermissionStatus()
        .then((status) {
      switch (status) {
        case PermissionStatus.denied:
          return permDenied;
        case PermissionStatus.granted:
          return permGranted;
        case PermissionStatus.unknown:
          return permUnknown;
        case PermissionStatus.provisional:
          return permProvisional;
        default:
          return null;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Notification Permissions'),
        ),
        body: Center(
            child: Container(
          margin: EdgeInsets.all(20),
          child: FutureBuilder(
            future: permissionStatusFuture,
            builder: (context, snapshot) {
              // if we are waiting for data, show a progress indicator
              if (snapshot.connectionState == ConnectionState.waiting) {
                return CircularProgressIndicator();
              }

              if (snapshot.hasError) {
                return Text('error while retrieving status: ${snapshot.error}');
              }

              if (snapshot.hasData) {
                var textWidget = Text(
                  "The permission status is ${snapshot.data}",
                  style: TextStyle(fontSize: 20),
                  softWrap: true,
                  textAlign: TextAlign.center,
                );
                // The permission is granted, then just show the text
                if (snapshot.data == permGranted) {
                  return textWidget;
                }

                // else, we'll show a button to ask for the permissions
                return Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    textWidget,
                    SizedBox(
                      height: 20,
                    ),
                    FlatButton(
                      color: Colors.amber,
                      child: Text("Ask for notification status".toUpperCase()),
                      onPressed: () {
                        // show the dialog/open settings screen
                        NotificationPermissions.requestNotificationPermissions(
                                iosSettings: const NotificationSettingsIos(
                                    sound: true, badge: true, alert: true))
                            .then((_) {
                          // when finished, check the permission status
                          setState(() {
                            permissionStatusFuture =
                                getCheckNotificationPermStatus();
                          });
                        });
                      },
                    )
                  ],
                );
              }
              return Text("No permission status yet");
            },
          ),
        )),
      ),
    );
  }
}