[camera] A fix for stopImageStream method which solves a stale images bug

packages/camera/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.5.7+6
+
+* Fixed an issue, where after restarting a subscription of the image stream, first few received images would be stale (typically images from the end of the first stream).
+
 ## 0.5.7+5
 
 * Replace deprecated `getFlutterEngine` call on Android.

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

@@ -475,6 +475,11 @@ private void setImageStreamImageAvailableListener(final EventChannel.EventSink i
         null);
   }
 
+  public void stopImageStream() throws CameraAccessException {
+    imageStreamReader.setOnImageAvailableListener(null, null);
+    startPreview();
+  }
+
   private void closeCaptureSession() {
     if (cameraCaptureSession != null) {
       cameraCaptureSession.close();

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

@@ -116,7 +116,7 @@ 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/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: 0.5.7+5
+version: 0.5.7+6
 
 homepage: https://github.com/flutter/plugins/tree/master/packages/camera