secure_content 0.1.0

Protect your app from screenshots, screen recording & on recent apps screen. Works for both Android & iOS, and is in development.

example/lib/main.dart

import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:flutter_portal/flutter_portal.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:secure_content/secure_content.dart';
import 'package:provider/provider.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // create an instance of `RouteObserver`
  final RouteObserver<PageRoute> _routeObserver = RouteObserver();
  MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return Portal(
      child: Provider.value(
        value: _routeObserver,
        child: MaterialApp(
          title: 'Flutter Demo',
          theme: ThemeData(
            // This is the theme of your application.
            //
            // Try running your application with "flutter run". You'll see the
            // application has a blue toolbar. Then, without quitting the app, try
            // changing the primarySwatch below to Colors.green and then invoke
            // "hot reload" (press "r" in the console where you ran "flutter run",
            // or simply save your changes to "hot reload" in a Flutter IDE).
            // Notice that the counter didn't reset back to zero; the application
            // is not restarted.
            primarySwatch: Colors.blue,
          ),
          home: const DefaultHome(title: 'Home Page'),
        ),
      ),
    );
  }
}

class DefaultHome extends StatelessWidget {
  const DefaultHome({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You can take screenshot on this page.',
            ),
            TextButton(
              onPressed: () => Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => MyHomePage(title: title),
                ),
              ),
              child: const Text(
                "Go to secure page",
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: const Text('Secure Page'),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            SizedBox(
              width: MediaQuery.of(context).size.width * 0.7,
              child: const Text(
                'You cannot take screenshot on this page, as the bottom text is wrapped with SecureWidget.',
                textAlign: TextAlign.center,
              ),
            ),
            SecureWidget(
              isSecure: true,
              onScreenshotCaptured: () => Fluttertoast.showToast(
                msg: "Screenshot captured!!!",
                toastLength: Toast.LENGTH_SHORT,
                gravity: ToastGravity.CENTER,
                timeInSecForIosWeb: 1,
                backgroundColor: Colors.green,
                textColor: Colors.white,
                fontSize: 16.0,
              ),
              onScreenRecordingStart: () => Fluttertoast.showToast(
                msg: "Screenrecording started!!!",
                toastLength: Toast.LENGTH_SHORT,
                gravity: ToastGravity.CENTER,
                timeInSecForIosWeb: 1,
                backgroundColor: Colors.red,
                textColor: Colors.white,
                fontSize: 16.0,
              ),
              onScreenRecordingStop: () => Fluttertoast.showToast(
                msg: "Screenrecording stopped!!!",
                toastLength: Toast.LENGTH_SHORT,
                gravity: ToastGravity.CENTER,
                timeInSecForIosWeb: 1,
                backgroundColor: Colors.red,
                textColor: Colors.white,
                fontSize: 16.0,
              ),
              builder: (context, onInit, onDispose) => Text(
                '$_counter',
                style: Theme.of(context).textTheme.headlineMedium,
              ),
              overlayWidgetBuilder: (context) => BackdropFilter(
                filter: ImageFilter.blur(sigmaX: 10, sigmaY: 10),
                child: const SizedBox(),
              ),
              appSwitcherMenuColor: Colors.pink,
              protectInAppSwitcherMenu: true,
            ),
            TextButton(
              onPressed: () => Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => const EmptyHome(secure: true),
                ),
              ),
              child: const Text(
                "Go to any other page",
              ),
            ),
            TextButton(
              onPressed: () => Navigator.pushReplacement(
                context,
                MaterialPageRoute(
                  builder: (context) => const EmptyHome(secure: false),
                ),
              ),
              child: const Text(
                "Go to any other page (replace)",
              ),
            )
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

class EmptyHome extends StatelessWidget {
  const EmptyHome({Key? key, required this.secure}) : super(key: key);

  final bool secure;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(secure ? 'Secure Page' : 'Unsecure Page'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            SizedBox(
              width: MediaQuery.of(context).size.width * 0.7,
              child: Text(
                secure
                    ? 'This page is also secured, as the widget still exists in the widget tree. But instead of pushing if you had replaced the previous page, it would have become unsecured.'
                    : 'You can take screenshot on this page, as the widget has been removed from the tree.',
                textAlign: TextAlign.center,
              ),
            ),
          ],
        ),
      ),
    );
  }
}