Added button to switch from front camera to back camera

README.md

@@ -22,6 +22,9 @@ Connect your device or start the emulator and run the following code
 # change directories
 cd Yoga-Guru
 
+# gets all the dependencies
+flutter get pub
+
 # run the app
 flutter run
 ```

lib/camera.dart

@@ -19,6 +19,7 @@ class Camera extends StatefulWidget {
 class _CameraState extends State<Camera> {
   CameraController controller;
   bool isDetecting = false;
+  int indexCamera = 0;
 
   static const platform = const MethodChannel('ondeviceML');
 
@@ -40,38 +41,60 @@ class _CameraState extends State<Camera> {
         if (!mounted) {
           return;
         }
-        setState(() {});
-
-        controller.startImageStream((CameraImage img) {
-          if (!isDetecting) {
-            isDetecting = true;
-
-            int startTime = new DateTime.now().millisecondsSinceEpoch;
-
-            Tflite.runPoseNetOnFrame(
-              bytesList: img.planes.map((plane) {
-                return plane.bytes;
-              }).toList(),
-              imageHeight: img.height,
-              imageWidth: img.width,
-              numResults: 1,
-              rotation: -90,
-              threshold: 0.2,
-              nmsRadius: 10,
-            ).then((recognitions) {
-              int endTime = new DateTime.now().millisecondsSinceEpoch;
-              print("Detection took ${endTime - startTime}");
-
-              widget.setRecognitions(recognitions, img.height, img.width);
-
-              isDetecting = false;
-            });
-          }
-        });
+        setState((){});
+        _poseCamera();
+
       });
     }
   }
 
+  void _poseCamera(){
+    controller.startImageStream((CameraImage img) {
+      if (!isDetecting) {
+        isDetecting = true;
+
+        int startTime = new DateTime.now().millisecondsSinceEpoch;
+
+        Tflite.runPoseNetOnFrame(
+          bytesList: img.planes.map((plane) {
+            return plane.bytes;
+          }).toList(),
+          imageHeight: img.height,
+          imageWidth: img.width,
+          numResults: 1,
+          rotation: -90,
+          threshold: 0.2,
+          nmsRadius: 10,
+        ).then((recognitions) {
+          int endTime = new DateTime.now().millisecondsSinceEpoch;
+          print("Detection took ${endTime - startTime}");
+
+          widget.setRecognitions(recognitions, img.height, img.width);
+
+          isDetecting = false;
+        });
+      }
+    });
+  }
+
+
+  void _onSwitchCamera() {
+    indexCamera = indexCamera < widget.cameras.length - 1 ? indexCamera + 1 : 0;
+
+    controller = new CameraController(
+      widget.cameras[indexCamera],
+      ResolutionPreset.high,
+    );
+
+    controller.initialize().then((_) {
+      if (!mounted) {
+        return;
+      }
+      setState((){});
+      _poseCamera();
+    });
+  }
+
   @override
   void dispose() {
     controller?.dispose();
@@ -93,12 +116,25 @@ class _CameraState extends State<Camera> {
     var screenRatio = screenH / screenW;
     var previewRatio = previewH / previewW;
 
-    return OverflowBox(
-      maxHeight:
-          screenRatio > previewRatio ? screenH : screenW / previewW * previewH,
-      maxWidth:
-          screenRatio > previewRatio ? screenH / previewH * previewW : screenW,
-      child: CameraPreview(controller),
+    return Stack(
+      children: <Widget> [
+        OverflowBox(
+          maxHeight: screenRatio > previewRatio ? screenH : screenW / previewW * previewH,
+          maxWidth: screenRatio > previewRatio ? screenH / previewH * previewW : screenW,
+          child: CameraPreview(controller),
+        ),
+        Align(
+          alignment: Alignment.centerRight,
+          child: FloatingActionButton(
+            onPressed: () {
+              _onSwitchCamera();
+            },
+            child: Icon(Icons.switch_camera),
+            backgroundColor: Colors.green,
+            elevation: 5,
+          ),
+        )
+      ],
     );
   }
-}
+}