[camera] Pause/resume video recording for Android(update of PR 1370)

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

@@ -166,6 +166,16 @@ public void onMethodCall(MethodCall call, final Result result) {
           camera.stopVideoRecording(result);
           break;
         }
+      case "pauseVideoRecording":
+        {
+          camera.pauseVideoRecording(result);
+          break;
+        }
+      case "resumeVideoRecording":
+        {
+          camera.resumeVideoRecording(result);
+          break;
+        }
       case "startImageStream":
         {
           try {
@@ -702,6 +712,34 @@ private void stopVideoRecording(@NonNull final Result result) {
       }
     }
 
+    private void pauseVideoRecording(@NonNull final Result result) {
+      if (!recordingVideo) {
+        result.success(null);
+        return;
+      }
+
+      try {
+        mediaRecorder.pause();
+        result.success(null);
+      } catch (IllegalStateException e) {
+        result.error("videoRecordingFailed", e.getMessage(), null);
+      }
+    }
+
+    private void resumeVideoRecording(@NonNull final Result result) {
+      if (!recordingVideo) {
+        result.success(null);
+        return;
+      }
+
+      try {
+        mediaRecorder.resume();
+        result.success(null);
+      } catch (IllegalStateException e) {
+        result.error("videoRecordingFailed", e.getMessage(), null);
+      }
+    }
+
     private void startPreview() throws CameraAccessException {
       closeCaptureSession();
 

packages/camera/lib/camera.dart

@@ -477,6 +477,62 @@ class CameraController extends ValueNotifier<CameraValue> {
     }
   }
 
+  /// Pause recording.
+  Future<void> pauseVideoRecording() async {
+    if (!value.isInitialized || _isDisposed) {
+      throw CameraException(
+        'Uninitialized CameraController',
+        'pauseVideoRecording was called on uninitialized CameraController',
+      );
+    }
+    if (!value.isRecordingVideo) {
+      throw CameraException(
+        'No video is recording',
+        'pauseVideoRecording was called when no video is recording.',
+      );
+    }
+    try {
+      // value = value.copyWith(isRecordingVideo: false);
+      // TODO(amirh): remove this on when the invokeMethod update makes it to stable Flutter.
+      // https://github.com/flutter/flutter/issues/26431
+      // ignore: strong_mode_implicit_dynamic_method
+      await _channel.invokeMethod(
+        'pauseVideoRecording',
+        <String, dynamic>{'textureId': _textureId},
+      );
+    } on PlatformException catch (e) {
+      throw CameraException(e.code, e.message);
+    }
+  }
+
+  /// Resume recording.
+  Future<void> resumeVideoRecording() async {
+    if (!value.isInitialized || _isDisposed) {
+      throw CameraException(
+        'Uninitialized CameraController',
+        'resumeVideoRecording was called on uninitialized CameraController',
+      );
+    }
+    if (!value.isRecordingVideo) {
+      throw CameraException(
+        'No video is recording',
+        'resumeVideoRecording was called when no video is recording.',
+      );
+    }
+    try {
+      // value = value.copyWith(isRecordingVideo: false);
+      // TODO(amirh): remove this on when the invokeMethod update makes it to stable Flutter.
+      // https://github.com/flutter/flutter/issues/26431
+      // ignore: strong_mode_implicit_dynamic_method
+      await _channel.invokeMethod(
+        'resumeVideoRecording',
+        <String, dynamic>{'textureId': _textureId},
+      );
+    } on PlatformException catch (e) {
+      throw CameraException(e.code, e.message);
+    }
+  }
+
   /// Releases the resources of this camera.
   @override
   Future<void> dispose() async {