[camera] Implement setDescription with android camerax (#10117)

setDescription allows switching camera while a video recording is in progress. This feature was only working with camera2 setup, but the camera plugin uses camerax by default. So, this PR includes update to address the issue.

Fixes [#148013](flutter/flutter#148013)

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Author: blackorbs-dev

packages/camera/camera/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.11.3
+
+* Adds support to configure persistent recording on Android. See `CameraController.startVideoRecording(enablePersistentRecording)`.
+* Updates minimum supported SDK version to Flutter 3.35.0/Dart 3.9.
+
 ## 0.11.2+1
 
 * Updates examples to use the new RadioGroup API instead of deprecated Radio parameters.

packages/camera/camera/example/integration_test/camera_test.dart

@@ -260,7 +260,9 @@ void main() {
     return completer.future;
   }
 
-  testWidgets('Set description while recording', (WidgetTester tester) async {
+  testWidgets('Set description while recording captures full video', (
+    WidgetTester tester,
+  ) async {
     final List<CameraDescription> cameras = await availableCameras();
     if (cameras.length < 2) {
       return;
@@ -269,7 +271,6 @@ void main() {
     final CameraController controller = CameraController(
       cameras[0],
       ResolutionPreset.low,
-      enableAudio: false,
     );
 
     await controller.initialize();
@@ -278,7 +279,27 @@ void main() {
     await controller.startVideoRecording();
     await controller.setDescription(cameras[1]);
 
-    expect(controller.description, cameras[1]);
+    await tester.pumpAndSettle(const Duration(seconds: 4));
+
+    await controller.setDescription(cameras[0]);
+
+    await tester.pumpAndSettle(const Duration(seconds: 1));
+
+    final XFile file = await controller.stopVideoRecording();
+
+    final File videoFile = File(file.path);
+    final VideoPlayerController videoController = VideoPlayerController.file(
+      videoFile,
+    );
+    await videoController.initialize();
+    final int duration = videoController.value.duration.inMilliseconds;
+    await videoController.dispose();
+
+    expect(
+      duration,
+      greaterThanOrEqualTo(const Duration(seconds: 4).inMilliseconds),
+    );
+    await controller.dispose();
   });
 
   testWidgets('Set description', (WidgetTester tester) async {

packages/camera/camera/lib/src/camera_controller.dart

@@ -187,20 +187,17 @@ class CameraValue {
           exposurePointSupported ?? this.exposurePointSupported,
       focusPointSupported: focusPointSupported ?? this.focusPointSupported,
       deviceOrientation: deviceOrientation ?? this.deviceOrientation,
-      lockedCaptureOrientation:
-          lockedCaptureOrientation == null
-              ? this.lockedCaptureOrientation
-              : lockedCaptureOrientation.orNull,
-      recordingOrientation:
-          recordingOrientation == null
-              ? this.recordingOrientation
-              : recordingOrientation.orNull,
+      lockedCaptureOrientation: lockedCaptureOrientation == null
+          ? this.lockedCaptureOrientation
+          : lockedCaptureOrientation.orNull,
+      recordingOrientation: recordingOrientation == null
+          ? this.recordingOrientation
+          : recordingOrientation.orNull,
       isPreviewPaused: isPreviewPaused ?? this.isPreviewPaused,
       description: description ?? this.description,
-      previewPauseOrientation:
-          previewPauseOrientation == null
-              ? this.previewPauseOrientation
-              : previewPauseOrientation.orNull,
+      previewPauseOrientation: previewPauseOrientation == null
+          ? this.previewPauseOrientation
+          : previewPauseOrientation.orNull,
     );
   }
 
@@ -439,6 +436,10 @@ class CameraController extends ValueNotifier<CameraValue> {
 
   /// Sets the description of the camera.
   ///
+  /// On Android, you must start the recording with [startVideoRecording]
+  /// with `enablePersistentRecording` set to `true`
+  /// to avoid cancelling any active recording.
+  ///
   /// Throws a [CameraException] if setting the description fails.
   Future<void> setDescription(CameraDescription description) async {
     if (value.isRecordingVideo) {
@@ -554,8 +555,15 @@ class CameraController extends ValueNotifier<CameraValue> {
   ///
   /// The video is returned as a [XFile] after calling [stopVideoRecording].
   /// Throws a [CameraException] if the capture fails.
+  ///
+  /// `enablePersistentRecording` parameter configures the recording to be a persistent recording.
+  /// A persistent recording can only be stopped by explicitly calling [stopVideoRecording]
+  /// and will ignore events that would normally cause recording to stop,
+  /// such as lifecycle events or explicit calls to [setDescription] while recording is in progress.
+  /// Currently a no-op on platforms other than Android.
   Future<void> startVideoRecording({
     onLatestImageAvailable? onAvailable,
+    bool enablePersistentRecording = true,
   }) async {
     _throwIfNotInitialized('startVideoRecording');
     if (value.isRecordingVideo) {
@@ -574,7 +582,11 @@ class CameraController extends ValueNotifier<CameraValue> {
 
     try {
       await CameraPlatform.instance.startVideoCapturing(
-        VideoCaptureOptions(_cameraId, streamCallback: streamCallback),
+        VideoCaptureOptions(
+          _cameraId,
+          streamCallback: streamCallback,
+          enablePersistentRecording: enablePersistentRecording,
+        ),
       );
       value = value.copyWith(
         isRecordingVideo: true,

packages/camera/camera/lib/src/camera_preview.dart

@@ -23,24 +23,23 @@ class CameraPreview extends StatelessWidget {
   Widget build(BuildContext context) {
     return controller.value.isInitialized
         ? ValueListenableBuilder<CameraValue>(
-          valueListenable: controller,
-          builder: (BuildContext context, Object? value, Widget? child) {
-            return AspectRatio(
-              aspectRatio:
-                  _isLandscape()
-                      ? controller.value.aspectRatio
-                      : (1 / controller.value.aspectRatio),
-              child: Stack(
-                fit: StackFit.expand,
-                children: <Widget>[
-                  _wrapInRotatedBox(child: controller.buildPreview()),
-                  child ?? Container(),
-                ],
-              ),
-            );
-          },
-          child: child,
-        )
+            valueListenable: controller,
+            builder: (BuildContext context, Object? value, Widget? child) {
+              return AspectRatio(
+                aspectRatio: _isLandscape()
+                    ? controller.value.aspectRatio
+                    : (1 / controller.value.aspectRatio),
+                child: Stack(
+                  fit: StackFit.expand,
+                  children: <Widget>[
+                    _wrapInRotatedBox(child: controller.buildPreview()),
+                    child ?? Container(),
+                  ],
+                ),
+              );
+            },
+            child: child,
+          )
         : Container();
   }
 
@@ -73,7 +72,7 @@ class CameraPreview extends StatelessWidget {
     return controller.value.isRecordingVideo
         ? controller.value.recordingOrientation!
         : (controller.value.previewPauseOrientation ??
-            controller.value.lockedCaptureOrientation ??
-            controller.value.deviceOrientation);
+              controller.value.lockedCaptureOrientation ??
+              controller.value.deviceOrientation);
   }
 }

packages/camera/camera/pubspec.yaml

@@ -4,11 +4,11 @@ description: A Flutter plugin for controlling the camera. Supports previewing
   Dart.
 repository: https://github.com/flutter/packages/tree/main/packages/camera/camera
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
-version: 0.11.2+1
+version: 0.11.3
 
 environment:
-  sdk: ^3.7.0
-  flutter: ">=3.29.0"
+  sdk: ^3.9.0
+  flutter: ">=3.35.0"
 
 flutter:
   plugin:
@@ -21,9 +21,9 @@ flutter:
         default_package: camera_web
 
 dependencies:
-  camera_android_camerax: ^0.6.13
+  camera_android_camerax: ^0.6.22
   camera_avfoundation: ^0.9.18
-  camera_platform_interface: ^2.10.0
+  camera_platform_interface: ^2.11.0
   camera_web: ^0.3.3
   flutter:
     sdk: flutter

packages/camera/camera/test/camera_preview_test.dart

@@ -112,6 +112,7 @@ class FakeController extends ValueNotifier<CameraValue>
   @override
   Future<void> startVideoRecording({
     onLatestImageAvailable? onAvailable,
+    bool enablePersistentRecording = true,
   }) async {}
 
   @override

packages/camera/camera/test/camera_test.dart

@@ -1838,10 +1838,9 @@ class MockCameraPlatform extends Mock
   Future<int> createCameraWithSettings(
     CameraDescription cameraDescription,
     MediaSettings? mediaSettings,
-  ) =>
-      mockPlatformException
-          ? throw PlatformException(code: 'foo', message: 'bar')
-          : Future<int>.value(mockInitializeCamera);
+  ) => mockPlatformException
+      ? throw PlatformException(code: 'foo', message: 'bar')
+      : Future<int>.value(mockInitializeCamera);
 
   @override
   Future<int> createCamera(
@@ -1869,10 +1868,9 @@ class MockCameraPlatform extends Mock
       );
 
   @override
-  Future<XFile> takePicture(int cameraId) =>
-      mockPlatformException
-          ? throw PlatformException(code: 'foo', message: 'bar')
-          : Future<XFile>.value(mockTakePicture);
+  Future<XFile> takePicture(int cameraId) => mockPlatformException
+      ? throw PlatformException(code: 'foo', message: 'bar')
+      : Future<XFile>.value(mockTakePicture);
 
   @override
   Future<void> prepareForVideoRecording() async =>