[camera] Fixed stale images in imageStream subscriptions

packages/camera/camera/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.6.0+2
+
+Set ImageStreamReader listener to null to prevent stale images when streaming images. 
+
 ## 0.6.0+1
 
 Updated README to inform users that iOS 10.0+ is needed for use

packages/camera/camera/android/src/main/java/io/flutter/plugins/camera/Camera.java

@@ -470,9 +470,7 @@ public void onListen(Object o, EventChannel.EventSink imageStreamSink) {
           }
 
           @Override
-          public void onCancel(Object o) {
-            imageStreamReader.setOnImageAvailableListener(null, null);
-          }
+          public void onCancel(Object o) {}
         });
   }
 
@@ -509,6 +507,13 @@ private void setImageStreamImageAvailableListener(final EventChannel.EventSink i
         null);
   }
 
+  public void stopImageStream() throws CameraAccessException {
+    if (imageStreamReader != null) {
+      imageStreamReader.setOnImageAvailableListener(null, null);
+    }
+    startPreview();
+  }
+
   private void closeCaptureSession() {
     if (cameraCaptureSession != null) {
       cameraCaptureSession.close();

packages/camera/camera/android/src/main/java/io/flutter/plugins/camera/MethodCallHandlerImpl.java

@@ -135,7 +135,7 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull final Result result)
       case "stopImageStream":
         {
           try {
-            camera.startPreview();
+            camera.stopImageStream();
             result.success(null);
           } catch (Exception e) {
             handleException(e, result);

packages/camera/camera/pubspec.yaml

@@ -2,7 +2,7 @@ name: camera
 description: A Flutter plugin for getting information about and controlling the
   camera on Android and iOS. Supports previewing the camera feed, capturing images, capturing video,
   and streaming image buffers to dart.
-version: 0.6.0+1
+version: 0.6.0+2
 homepage: https://github.com/flutter/plugins/tree/master/packages/camera/camera
 
 dependencies: