CAMERAX VERSION: 1.3.0-alpha02

ANDROID OS BUILD NUMBER: TP1A.221105.002

DEVICE NAME: Pixel 6

DESCRIPTION: ImageCapture use case throw an exception when app trying to take picture on front camera with flash mode set to FLASH_MODE_ON.

In java doc in ImageCapture for public void setFlashMode(@FlashMode int flashMode)

... If there is no flash unit, then calling this API will take no effect for the subsequent photo capture requests and they will act like FLASH_MODE_OFF...

So in my understanding even i set ImageCapture.FLASH_MODE_ON on camera that doesn't have flash unit, it should work fine without any exceptions.

STEPS TO REPRODUCE: 1.

enable flash

 cameraController.imageCaptureFlashMode = ImageCapture.FLASH_MODE_ON

2.

select front camera

cameraController.cameraSelector =  CameraSelector.DEFAULT_FRONT_CAMERA

3.

try to take picture

cameraController.takePicture(...)

OBSERVED RESULTS:

Exception

2022-12-22 13:36:57.372 androidx.camera.core.ImageCaptureException: Failed to submit capture request
      at androidx.camera.core.imagecapture.TakePictureManager$1.onFailure(TakePictureManager.java:258)
      at androidx.camera.core.impl.utils.futures.Futures$CallbackListener.run(Futures.java:345)
      at android.os.Handler.handleCallback(Handler.java:942)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loopOnce(Looper.java:201)
      at android.os.Looper.loop(Looper.java:288)
      at android.app.ActivityThread.main(ActivityThread.java:7898)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
   Caused by: java.lang.IllegalStateException: No flash unit
      at androidx.camera.camera2.internal.TorchControl.enableTorchInternal(TorchControl.java:185)
      at androidx.camera.camera2.internal.Camera2CapturePipeline$TorchTask.lambda$preCapture$0$androidx-camera-camera2-internal-Camera2CapturePipeline$TorchTask(Camera2CapturePipeline.java:571)
      at androidx.camera.camera2.internal.Camera2CapturePipeline$TorchTask$$ExternalSyntheticLambda3.attachCompleter(Unknown Source:2)
      at androidx.concurrent.futures.CallbackToFutureAdapter.getFuture(CallbackToFutureAdapter.java:102)
      at androidx.camera.camera2.internal.Camera2CapturePipeline$TorchTask.preCapture(Camera2CapturePipeline.java:570)
      at androidx.camera.camera2.internal.Camera2CapturePipeline$Pipeline$1.preCapture(Camera2CapturePipeline.java:221)
      at androidx.camera.camera2.internal.Camera2CapturePipeline$Pipeline.lambda$executeCapture$0$androidx-camera-camera2-internal-Camera2CapturePipeline$Pipeline(Camera2CapturePipeline.java:290)
      at androidx.camera.camera2.internal.Camera2CapturePipeline$Pipeline$$ExternalSyntheticLambda2.apply(Unknown Source:6)
      at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.run(ChainingListenableFuture.java:203)
      at androidx.camera.core.impl.utils.executor.SequentialExecutor$QueueWorker.workOnQueue(SequentialExecutor.java:231)
      at androidx.camera.core.impl.utils.executor.SequentialExecutor$QueueWorker.run(SequentialExecutor.java:173)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
      at java.lang.Thread.run(Thread.java:1012)

EXPECTED RESULTS:

Image successfully captured, without any exceptions

REPRODUCIBILITY: 100%