fix crash when poping a route with the camera preview (#32)

Author: kevin-sakemaer

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [2.0.1] - 5/05/2019
+
+* fix a crash when poping a route with the camera preview
+
 ## [2.0.0] - 2/05/2019
 
 * We now forward the result from firebase_ml_vision for onResult

example/pubspec.lock

@@ -70,7 +70,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "2.0.0"
+    version: "2.0.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter

lib/flutter_camera_ml_vision.dart

@@ -91,10 +91,12 @@ class CameraMlVisionState<T> extends State<CameraMlVision<T>> {
     }
   }
 
-  Future<void> _stop(bool silently) async {
-    if (_cameraController.value.isStreamingImages) {
-      await _cameraController.stopImageStream();
-    }
+  void _stop(bool silently) {
+    Future.microtask(() async {
+      if (_cameraController?.value?.isStreamingImages == true && mounted) {
+        await _cameraController.stopImageStream();
+      }
+    });
 
     if (silently) {
       _isStreaming = false;

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_camera_ml_vision
 description: A flutter widget that show the camera stream and allow ML vision recognition on it, it allow you to detect barcodes, labels, text, faces...
-version: 2.0.0
+version: 2.0.1
 authors:
   - Jimmy Aumard <[email protected]>
   - Rushio Consulting <[email protected]>