diff --git a/android/src/main/java/com/amolg/flutterbarcodescanner/BarcodeCaptureActivity.java b/android/src/main/java/com/amolg/flutterbarcodescanner/BarcodeCaptureActivity.java
index b44216a1..2659cb70 100755
--- a/android/src/main/java/com/amolg/flutterbarcodescanner/BarcodeCaptureActivity.java
+++ b/android/src/main/java/com/amolg/flutterbarcodescanner/BarcodeCaptureActivity.java
@@ -111,33 +111,33 @@ public void onCreate(Bundle icicle) {
 
             String buttonText = "";
             try {
-                    buttonText = (String) getIntent().getStringExtra("cancelButtonText");
-        } catch (Exception e) {
-            buttonText = "Cancel";
-            Log.e("BCActivity:onCreate()", "onCreate: " + e.getLocalizedMessage());
-        }
+                buttonText = (String) getIntent().getStringExtra("cancelButtonText");
+            } catch (Exception e) {
+                buttonText = "Cancel";
+                Log.e("BCActivity:onCreate()", "onCreate: " + e.getLocalizedMessage());
+            }
 
-        Button btnBarcodeCaptureCancel = findViewById(R.id.btnBarcodeCaptureCancel);
-        btnBarcodeCaptureCancel.setText(buttonText);
-        btnBarcodeCaptureCancel.setOnClickListener(this);
+            Button btnBarcodeCaptureCancel = findViewById(R.id.btnBarcodeCaptureCancel);
+            btnBarcodeCaptureCancel.setText(buttonText);
+            btnBarcodeCaptureCancel.setOnClickListener(this);
 
-        imgViewBarcodeCaptureUseFlash = findViewById(R.id.imgViewBarcodeCaptureUseFlash);
-        imgViewBarcodeCaptureUseFlash.setOnClickListener(this);
-        imgViewBarcodeCaptureUseFlash.setVisibility(FlutterBarcodeScannerPlugin.isShowFlashIcon ? View.VISIBLE : View.GONE);
+            imgViewBarcodeCaptureUseFlash = findViewById(R.id.imgViewBarcodeCaptureUseFlash);
+            imgViewBarcodeCaptureUseFlash.setOnClickListener(this);
+            imgViewBarcodeCaptureUseFlash.setVisibility(FlutterBarcodeScannerPlugin.isShowFlashIcon ? View.VISIBLE : View.GONE);
 
-        imgViewSwitchCamera = findViewById(R.id.imgViewSwitchCamera);
-        imgViewSwitchCamera.setOnClickListener(this);
+            imgViewSwitchCamera = findViewById(R.id.imgViewSwitchCamera);
+            imgViewSwitchCamera.setOnClickListener(this);
 
-        mPreview = findViewById(R.id.preview);
-        mGraphicOverlay = findViewById(R.id.graphicOverlay);
+            mPreview = findViewById(R.id.preview);
+            mGraphicOverlay = findViewById(R.id.graphicOverlay);
 
-        // read parameters from the intent used to launch the activity.
-        boolean autoFocus = true;
-        boolean useFlash = false;
+            // read parameters from the intent used to launch the activity.
+            boolean autoFocus = true;
+            boolean useFlash = false;
 
-        // Check for the camera permission before accessing the camera.  If the
-        // permission is not granted yet, request permission.
-        int rc = ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
+            // Check for the camera permission before accessing the camera.  If the
+            // permission is not granted yet, request permission.
+            int rc = ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
             if (rc == PackageManager.PERMISSION_GRANTED) {
                 createCameraSource(autoFocus, useFlash, CameraSource.CAMERA_FACING_BACK);
             } else {
@@ -419,13 +419,30 @@ public void onClick(View v) {
             finish();
         } else if (i == R.id.imgViewSwitchCamera) {
             int currentFacing = mCameraSource.getCameraFacing();
-            boolean autoFocus = mCameraSource.getFocusMode() != null;
-            boolean useFlash = flashStatus == USE_FLASH.ON.ordinal();
-            createCameraSource(autoFocus, useFlash, getInverseCameraFacing(currentFacing));
-            startCameraSource();
+            int inverseFacing = getInverseCameraFacing(currentFacing);
+            if (hasCamera(inverseFacing)) {
+                boolean autoFocus = mCameraSource.getFocusMode() != null;
+                boolean useFlash = flashStatus == USE_FLASH.ON.ordinal();
+                createCameraSource(autoFocus, useFlash, inverseFacing);
+                startCameraSource();
+            }
         }
     }
 
+    private boolean hasCamera(int cameraFacing) {
+        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
+        int numberOfCameras = Camera.getNumberOfCameras();
+
+        for (int i = 0; i < numberOfCameras; i++) {
+            Camera.getCameraInfo(i, cameraInfo);
+            if (cameraInfo.facing == cameraFacing) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     private int getInverseCameraFacing(int cameraFacing) {
         if (cameraFacing == CameraSource.CAMERA_FACING_FRONT) {
             return CameraSource.CAMERA_FACING_BACK;
diff --git a/example/ios/Flutter/flutter_export_environment.sh b/example/ios/Flutter/flutter_export_environment.sh
deleted file mode 100755
index 9e2cc398..00000000
--- a/example/ios/Flutter/flutter_export_environment.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/sh
-# This is a generated file; do not edit or check into version control.
-export "FLUTTER_ROOT=/Volumes/MyData/Flutter_SDK/flutter"
-export "FLUTTER_APPLICATION_PATH=/Users/admin/Desktop/FlutterBarcodeScanner/flutter_barcode_scanner/example"
-export "FLUTTER_TARGET=lib/main.dart"
-export "FLUTTER_BUILD_DIR=build"
-export "SYMROOT=${SOURCE_ROOT}/../build/ios"
-export "FLUTTER_BUILD_NAME=2.0.0.0"
-export "FLUTTER_BUILD_NUMBER=2.0.0.0"
-export "DART_OBFUSCATION=false"
-export "TRACK_WIDGET_CREATION=false"
-export "TREE_SHAKE_ICONS=false"
-export "PACKAGE_CONFIG=.packages"