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[camera_android_camerax] Fix the rotation of captured videos and streamed images #9637

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[camera_android_camerax] Fix the rotation of captured videos and streamed images #9637

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750c194
fixes
camsim99 Jul 16, 2025
1788b45
small refactor
camsim99 Jul 16, 2025
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29 changes: 7 additions & 22 deletions packages/camera/camera_android_camerax/lib/src/android_camera_camerax.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -195,17 +195,6 @@ class AndroidCameraCameraX extends CameraPlatform {
@visibleForTesting
bool captureOrientationLocked = false;

/// Whether or not the default rotation for [UseCase]s needs to be set
/// manually because the capture orientation was previously locked.
///
/// Currently, CameraX provides no way to unset target rotations for
/// [UseCase]s, so once they are set and unset, this plugin must start setting
/// the default orientation manually.
///
/// See https://developer.android.com/reference/androidx/camera/core/ImageCapture#setTargetRotation(int)
/// for an example on how setting target rotations for [UseCase]s works.
bool shouldSetDefaultRotation = false;

/// Error code indicating that an exposure offset value failed to be set.
static const String setExposureOffsetFailedErrorCode =
'setExposureOffsetFailed';
Expand Down Expand Up @@ -390,17 +379,18 @@ class AndroidCameraCameraX extends CameraPlatform {
);

// Configure ImageCapture instance.
_initialDefaultDisplayRotation =
await deviceOrientationManager.getDefaultDisplayRotation();
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medium

Consider extracting deviceOrientationManager.getDefaultDisplayRotation() to a local variable before calling proxy.newImageCapture. This avoids calling the platform multiple times, which could be inefficient.

final int defaultDisplayRotation = await deviceOrientationManager.getDefaultDisplayRotation();

imageCapture = proxy.newImageCapture(
resolutionSelector: presetResolutionSelector,
/* use CameraX default target rotation */ targetRotation:
await deviceOrientationManager.getDefaultDisplayRotation(),
targetRotation: _initialDefaultDisplayRotation,
);

// Configure ImageAnalysis instance.
// Defaults to YUV_420_888 image format.
imageAnalysis = proxy.newImageAnalysis(
resolutionSelector: presetResolutionSelector,
/* use CameraX default target rotation */ targetRotation: null,
targetRotation: _initialDefaultDisplayRotation,
);

// Configure VideoCapture and Recorder instances.
Expand Down Expand Up @@ -437,8 +427,6 @@ class AndroidCameraCameraX extends CameraPlatform {
_initialDeviceOrientation = _deserializeDeviceOrientation(
await deviceOrientationManager.getUiOrientation(),
);
_initialDefaultDisplayRotation =
await deviceOrientationManager.getDefaultDisplayRotation();

return flutterSurfaceTextureId;
}
Expand Down Expand Up @@ -552,10 +540,7 @@ class AndroidCameraCameraX extends CameraPlatform {
int cameraId,
DeviceOrientation orientation,
) async {
// Flag that (1) default rotation for UseCases will need to be set manually
// if orientation is ever unlocked and (2) the capture orientation is locked
// and should not be changed until unlocked.
shouldSetDefaultRotation = true;
// Flag that the capture orientation is locked and should not be changed until unlocked.
captureOrientationLocked = true;

// Get target rotation based on locked orientation.
Expand Down Expand Up @@ -1104,7 +1089,7 @@ class AndroidCameraCameraX extends CameraPlatform {

// Set target rotation to default CameraX rotation only if capture
// orientation not locked.
if (!captureOrientationLocked && shouldSetDefaultRotation) {
if (!captureOrientationLocked) {
await videoCapture!.setTargetRotation(
await deviceOrientationManager.getDefaultDisplayRotation(),
Comment on lines +1092 to 1094
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medium

Instead of calling deviceOrientationManager.getDefaultDisplayRotation() directly within setTargetRotation, consider storing the value in a variable and reusing it. This avoids redundant calls to the platform, improving efficiency.

final rotation = await deviceOrientationManager.getDefaultDisplayRotation();
await videoCapture!.setTargetRotation(
  rotation,
);

);
Expand Down Expand Up @@ -1253,7 +1238,7 @@ class AndroidCameraCameraX extends CameraPlatform {

// Set target rotation to default CameraX rotation only if capture
// orientation not locked.
if (!captureOrientationLocked && shouldSetDefaultRotation) {
if (!captureOrientationLocked) {
await imageAnalysis!.setTargetRotation(
await deviceOrientationManager.getDefaultDisplayRotation(),
Comment on lines +1241 to 1243
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medium

Instead of calling deviceOrientationManager.getDefaultDisplayRotation() directly within setTargetRotation, consider storing the value in a variable and reusing it. This avoids redundant calls to the platform, improving efficiency.

final rotation = await deviceOrientationManager.getDefaultDisplayRotation();
      await imageAnalysis!.setTargetRotation(
        rotation,
      );

);
Expand Down