diff --git a/README.md b/README.md
index 09332c5..888c668 100644
--- a/README.md
+++ b/README.md
@@ -60,31 +60,39 @@ class _QRViewExampleState extends State<QRViewExample> {
   Widget build(BuildContext context) {
     return Scaffold(
       body: Column(
-                children: <Widget>[
-                    QRView(
-                      key: qrKey,
-                      onQRViewCreated: _onQRViewCreated,
-                    ),          
-                  ],
-                ),
-          );
+        children: <Widget>[
+          Expanded(
+            flex: 5,
+            child: QRView(
+              key: qrKey,
+              onQRViewCreated: _onQRViewCreated,
+            ),
+          ),
+          Expanded(
+            flex: 1,
+            child: Center(
+              child: Text('Scan result: $qrText'),
+            ),
+          )
+        ],
+      ),
+    );
   }
 
   void _onQRViewCreated(QRViewController controller) {
-    final channel = controller.channel;
-    controller.init(qrKey);
     this.controller = controller;
-    channel.setMethodCallHandler((MethodCall call) async {
-      switch (call.method) {
-        case "onRecognizeQR":
-          dynamic arguments = call.arguments;
-          setState(() {
-            qrText = arguments.toString();
-          });
-      }
+    controller.scannedDataStream.listen((scanData) {
+      setState(() {
+        qrText = scanData;
+      });
     });
   }
-  
+
+  @override
+  void dispose() {
+    controller?.dispose();
+    super.dispose();
+  }
 }
 ```
 
@@ -104,9 +112,21 @@ controller.flipCamera();
 ## Flash (Off/On)
 By default, flash is OFF.
 ```dart
-controller.flipFlash();
+controller.toggleFlash();
+```
+
+## Resume/Pause
+Pause camera stream and scanner.
+```dart
+controller.pause();
+```
+Resume camera stream and scanner.
+```dart
+controller.resume();
 ```
 
+
+
 # TODO'S:
 * iOS Native embedding is written to match what is supported in the framework as of the date of publication of this package. It needs to be improved as the framework support improves.
 * In future, options will be provided for default states.
diff --git a/example/lib/main.dart b/example/lib/main.dart
index cc85f8a..49d97d3 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:qr_code_scanner/qr_code_scanner.dart';
 
 void main() => runApp(MaterialApp(home: QRViewExample()));
@@ -19,11 +18,11 @@ class QRViewExample extends StatefulWidget {
 }
 
 class _QRViewExampleState extends State<QRViewExample> {
-  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
   var qrText = "";
   var flashState = flash_on;
   var cameraState = front_camera;
   QRViewController controller;
+  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
 
   @override
   Widget build(BuildContext context) {
@@ -38,79 +37,86 @@ class _QRViewExampleState extends State<QRViewExample> {
             flex: 4,
           ),
           Expanded(
-            child: Column(
-              children: <Widget>[
-                Text("This is the result of scan: $qrText"),
-                Row(
-                  mainAxisAlignment: MainAxisAlignment.center,
-                  crossAxisAlignment: CrossAxisAlignment.center,
-                  children: <Widget>[
-                    Container(
-                      margin: EdgeInsets.all(8.0),
-                      child: RaisedButton(
-                        onPressed: () {
-                          if (controller != null) {
-                            controller.toggleFlash();
-                            if (_isFlashOn(flashState))
-                              setState(() {
-                                flashState = flash_off;
-                              });
-                            else
-                              setState(() {
-                                flashState = flash_on;
-                              });
-                          }
-                        },
-                        child: Text(flashState, style: TextStyle(fontSize: 20)),
-                      ),
-                    ),
-                    Container(
-                      margin: EdgeInsets.all(8.0),
-                      child: RaisedButton(
-                        onPressed: () {
-                          if (controller != null) {
-                            controller.flipCamera();
-                            if (_isBackCamera(cameraState))
-                              setState(() {
-                                cameraState = front_camera;
-                              });
-                            else
-                              setState(() {
-                                cameraState = back_camera;
-                              });
-                          }
-                        },
-                        child:
-                            Text(cameraState, style: TextStyle(fontSize: 20)),
-                      ),
-                    )
-                  ],
-                ),
-                Row(
-                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-                  crossAxisAlignment: CrossAxisAlignment.center,
-                  children: <Widget>[
-                    Container(
-                      margin: EdgeInsets.only(bottom: 8.0),
-                      child: RaisedButton(
-                        onPressed: () {
-                          controller?.pauseCamera();
-                        },
-                        child: Text('pause', style: TextStyle(fontSize: 20)),
+            child: FittedBox(
+              fit: BoxFit.contain,
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                children: <Widget>[
+                  Text("This is the result of scan: $qrText"),
+                  Row(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    crossAxisAlignment: CrossAxisAlignment.center,
+                    children: <Widget>[
+                      Container(
+                        margin: EdgeInsets.all(8.0),
+                        child: RaisedButton(
+                          onPressed: () {
+                            if (controller != null) {
+                              controller.toggleFlash();
+                              if (_isFlashOn(flashState)) {
+                                setState(() {
+                                  flashState = flash_off;
+                                });
+                              } else {
+                                setState(() {
+                                  flashState = flash_on;
+                                });
+                              }
+                            }
+                          },
+                          child:
+                              Text(flashState, style: TextStyle(fontSize: 20)),
+                        ),
                       ),
-                    ),
-                    Container(
-                      margin: EdgeInsets.only(bottom: 8.0),
-                      child: RaisedButton(
-                        onPressed: () {
-                          controller.resumeCamera();
-                        },
-                        child: Text('resume', style: TextStyle(fontSize: 20)),
+                      Container(
+                        margin: EdgeInsets.all(8.0),
+                        child: RaisedButton(
+                          onPressed: () {
+                            if (controller != null) {
+                              controller.flipCamera();
+                              if (_isBackCamera(cameraState)) {
+                                setState(() {
+                                  cameraState = front_camera;
+                                });
+                              } else {
+                                setState(() {
+                                  cameraState = back_camera;
+                                });
+                              }
+                            }
+                          },
+                          child:
+                              Text(cameraState, style: TextStyle(fontSize: 20)),
+                        ),
+                      )
+                    ],
+                  ),
+                  Row(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    crossAxisAlignment: CrossAxisAlignment.center,
+                    children: <Widget>[
+                      Container(
+                        margin: EdgeInsets.all(8.0),
+                        child: RaisedButton(
+                          onPressed: () {
+                            controller?.pauseCamera();
+                          },
+                          child: Text('pause', style: TextStyle(fontSize: 20)),
+                        ),
                       ),
-                    )
-                  ],
-                ),
-              ],
+                      Container(
+                        margin: EdgeInsets.all(8.0),
+                        child: RaisedButton(
+                          onPressed: () {
+                            controller?.resumeCamera();
+                          },
+                          child: Text('resume', style: TextStyle(fontSize: 20)),
+                        ),
+                      )
+                    ],
+                  ),
+                ],
+              ),
             ),
             flex: 1,
           )
@@ -128,17 +134,17 @@ class _QRViewExampleState extends State<QRViewExample> {
   }
 
   void _onQRViewCreated(QRViewController controller) {
-    final channel = controller.channel;
-    controller.init(qrKey);
     this.controller = controller;
-    channel.setMethodCallHandler((MethodCall call) async {
-      switch (call.method) {
-        case "onRecognizeQR":
-          dynamic arguments = call.arguments;
-          setState(() {
-            qrText = arguments.toString();
-          });
-      }
+    controller.scannedDataStream.listen((scanData) {
+      setState(() {
+        qrText = scanData;
+      });
     });
   }
+
+  @override
+  void dispose() {
+    controller.dispose();
+    super.dispose();
+  }
 }
diff --git a/lib/qr_code_scanner.dart b/lib/qr_code_scanner.dart
index 2f1cde2..60e08e3 100644
--- a/lib/qr_code_scanner.dart
+++ b/lib/qr_code_scanner.dart
@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -6,9 +8,11 @@ typedef void QRViewCreatedCallback(QRViewController controller);
 
 class QRView extends StatefulWidget {
   const QRView({
-    Key key,
-    this.onQRViewCreated,
-  }) : super(key: key);
+    @required Key key,
+    @required this.onQRViewCreated,
+  })  : assert(key != null),
+        assert(onQRViewCreated != null),
+        super(key: key);
 
   final QRViewCreatedCallback onQRViewCreated;
 
@@ -45,7 +49,7 @@ class _QRViewState extends State<QRView> {
     if (widget.onQRViewCreated == null) {
       return;
     }
-    widget.onQRViewCreated(new QRViewController._(id));
+    widget.onQRViewCreated(QRViewController._(id, widget.key));
   }
 }
 
@@ -71,31 +75,50 @@ class _CreationParams {
 }
 
 class QRViewController {
-  QRViewController._(int id)
-      : channel = MethodChannel('net.touchcapture.qr.flutterqr/qrview_$id');
-  final MethodChannel channel;
+  static const scanMethodCall = "onRecognizeQR";
+
+  final MethodChannel _channel;
+
+  StreamController<String> _scanUpdateController = StreamController<String>();
+
+  Stream<String> get scannedDataStream => _scanUpdateController.stream;
 
-  void init(GlobalKey qrKey) {
+  QRViewController._(int id, GlobalKey qrKey)
+      : _channel = MethodChannel('net.touchcapture.qr.flutterqr/qrview_$id') {
     if (defaultTargetPlatform == TargetPlatform.iOS) {
       final RenderBox renderBox = qrKey.currentContext.findRenderObject();
-      channel.invokeMethod("setDimensions",
+      _channel.invokeMethod("setDimensions",
           {"width": renderBox.size.width, "height": renderBox.size.height});
     }
+    _channel.setMethodCallHandler(
+      (MethodCall call) async {
+        switch (call.method) {
+          case scanMethodCall:
+            if (call.arguments != null) {
+              _scanUpdateController.sink.add(call.arguments.toString());
+            }
+        }
+      },
+    );
   }
 
   void flipCamera() {
-    channel.invokeMethod("flipCamera");
+    _channel.invokeMethod("flipCamera");
   }
 
   void toggleFlash() {
-    channel.invokeMethod("toggleFlash");
+    _channel.invokeMethod("toggleFlash");
   }
 
   void pauseCamera() {
-    channel.invokeMethod("pauseCamera");
+    _channel.invokeMethod("pauseCamera");
   }
 
   void resumeCamera() {
-    channel.invokeMethod("resumeCamera");
+    _channel.invokeMethod("resumeCamera");
+  }
+
+  void dispose() {
+    _scanUpdateController.close();
   }
 }