Merge branch 'master' into fix/flashToggle

android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt

@@ -89,6 +89,17 @@ class QRView(private val registrar: PluginRegistry.Registrar, id: Int) :
 
     }
 
+    private fun pauseCamera() {
+        if (barcodeView!!.isPreviewActive) {
+            barcodeView?.pause()
+        }
+    }
+
+    private fun resumeCamera() {
+        if (!barcodeView!!.isPreviewActive) {
+            barcodeView?.resume()
+        }
+    }
 
     private fun hasFlash(): Boolean {
         return registrar.activeContext().packageManager
@@ -154,6 +165,12 @@ class QRView(private val registrar: PluginRegistry.Registrar, id: Int) :
             "toggleFlash" -> {
                 toggleFlash()
             }
+            "pauseCamera" -> {
+                pauseCamera()
+            }
+            "resumeCamera" -> {
+                resumeCamera()
+            }
         }
     }
 

azure-pipelines.yml

@@ -17,19 +17,19 @@ pool:
 steps:
 - script: |
     cd example
-    $(flutterPath)/flutter build ios
+    $flutterPath/flutter build ios
   displayName: 'Test iOS -- Build'
   env:
     flutterPath: $(flutterPath)
 - script: |
     cd example
-    $(flutterPath)/flutter packages get
-    $(flutterPath)/flutter build apk --target-platform android-arm,android-arm64 --split-per-abi
+    $flutterPath/flutter packages get
+    $flutterPath/flutter build apk --target-platform android-arm,android-arm64 --split-per-abi
   displayName: 'Test Android -- Build'
   env:
     flutterPath: $(flutterPath)
 - script: |
-    $(flutterPath)/flutter pub pub publish --dry-run
+    $flutterPath/flutter pub pub publish --dry-run
   displayName: 'Publish -- Dry Run'
   env:
     flutterPath: $(flutterPath)

example/lib/main.dart

@@ -85,7 +85,31 @@ class _QRViewExampleState extends State<QRViewExample> {
                       ),
                     )
                   ],
-                )
+                ),
+                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)),
+                      ),
+                    ),
+                    Container(
+                      margin: EdgeInsets.only(bottom: 8.0),
+                      child: RaisedButton(
+                        onPressed: () {
+                          controller.resumeCamera();
+                        },
+                        child: Text('resume', style: TextStyle(fontSize: 20)),
+                      ),
+                    )
+                  ],
+                ),
               ],
             ),
             flex: 1,

ios/Classes/QRView.swift

@@ -83,4 +83,20 @@ public class QRView:NSObject,FlutterPlatformView {
             }
         }
     }
+    
+    func pauseCamera() {
+        if let sc: MTBBarcodeScanner = scanner {
+            if sc.isScanning() {
+                sc.freezeCapture()
+            }
+        }
+    }
+    
+    func resumeCamera() {
+        if let sc: MTBBarcodeScanner = scanner {
+            if !sc.isScanning() {
+                sc.unfreezeCapture()
+            }
+        }
+    }
 }

lib/qr_code_scanner.dart

@@ -90,4 +90,12 @@ class QRViewController {
   void toggleFlash() {
     channel.invokeMethod("toggleFlash");
   }
+
+  void pauseCamera() {
+    channel.invokeMethod("pauseCamera");
+  }
+
+  void resumeCamera() {
+    channel.invokeMethod("resumeCamera");
+  }
 }