Improvement/dispose on qr controller

android/src/main/kotlin/com/xzp/qrcode_flutter/QRCaptureView.kt

@@ -45,6 +45,12 @@ class QRCaptureView(id: Int) :
                 barcodeView?.setTorch(isOn)
             }
         }
+
+        when (call?.method) {
+            "dispose" -> {
+                dispose()
+            }
+        }
     }
 
     private fun resume() {

example/lib/main.dart

@@ -16,6 +16,8 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
 
   String _captureText = '';
 
+  int _captureCount = 0;
+
   @override
   void initState() {
     super.initState();
@@ -24,6 +26,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
       print('$data');
       setState(() {
         _captureText = data;
+        _captureCount++;
       });
     });
   }
@@ -48,6 +51,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
                     await QRCaptureController.getQrCodeByImagePath(image.path);
                 setState(() {
                   _captureText = qrCodeResult.join('\n');
+                  _captureCount++;
                 });
               },
               child: Text('photoAlbum', style: TextStyle(color: Colors.white)),
@@ -72,24 +76,21 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
             ),
             Container(
               child: Text('$_captureText'),
-            )
+            ),
+            Container(
+              child: Text('Capture count: $_captureCount'),
+              alignment: Alignment.topCenter.add(Alignment(0, 0.2)),
+            ),
           ],
         ),
       ),
     );
   }
 
   Widget _buildToolBar() {
-    return Row(
-      mainAxisSize: MainAxisSize.max,
-      mainAxisAlignment: MainAxisAlignment.center,
-      children: <Widget>[
-        FlatButton(
-          onPressed: () {
-            _controller.pause();
-          },
-          child: Text('pause'),
-        ),
+    return Column(
+      mainAxisAlignment: MainAxisAlignment.end,
+      children: [
         FlatButton(
           onPressed: () {
             if (_isTorchOn) {
@@ -99,13 +100,31 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
             }
             _isTorchOn = !_isTorchOn;
           },
-          child: Text('torch'),
+          child: Text('\n\ntorch'),
         ),
-        FlatButton(
-          onPressed: () {
-            _controller.resume();
-          },
-          child: Text('resume'),
+        Row(
+          mainAxisSize: MainAxisSize.max,
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            FlatButton(
+              onPressed: () {
+                _controller.pause();
+              },
+              child: Text('pause'),
+            ),
+            FlatButton(
+              onPressed: () {
+                _controller.resume();
+              },
+              child: Text('resume'),
+            ),
+            FlatButton(
+              onPressed: () {
+                _controller.dispose();
+              },
+              child: Text('dispose'),
+            ),
+          ],
         ),
       ],
     );

ios/Classes/QRCaptureView.m

@@ -82,6 +82,8 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
             [device setTorchMode:AVCaptureTorchModeOff];
         }
         [device unlockForConfiguration];
+    } else if ([call.method isEqualToString:@"dispose"]) {
+        [self dealloc];
     }
 }
 

lib/qrcode_flutter.dart

@@ -37,6 +37,10 @@ class QRCaptureController {
     _capture = capture;
   }
 
+  void dispose() {
+    _methodChannel?.invokeMethod('dispose');
+  }
+
   set torchMode(CaptureTorchMode mode) {
     var isOn = mode == CaptureTorchMode.on;
     _methodChannel?.invokeMethod('setTorchMode', isOn);