IssueTracker

CAMERAX VERSION (ex - 1.1.0-beta01) ANDROID OS BUILD NUMBER: Android 7.1.1

DEVICE NAME: (Meizu 15)

DESCRIPTION: i want to freeze preview when taking picture so i call

cameraProvider?.unbind(preview)

imageCapture?.takePicture(builder, Executors.newSingleThreadExecutor(), callback)

OBSERVED RESULTS: freeze preview but can not take picture

EXPECTED RESULTS: freeze preview and take picture

REPRODUCIBILITY: 5 of 5

ADDITIONAL INFORMATION:

if i add this line:

cameraProvider?.unbind(preview) here:

https://github.com/android/camera-samples/blob/9a92a8a1d81b581c442f2e66c066bec8c94225fb/CameraXBasic/app/src/main/java/com/android/example/cameraxbasic/fragments/CameraFragment.kt#L473

i've got:

androidx.camera.core.ImageCaptureException: Request is canceled. at androidx.camera.core.ImageCapture$ImageCaptureRequest.lambda$notifyCallbackError$1$ImageCapture$ImageCaptureRequest(ImageCapture.java:2166) at androidx.camera.core.-$$Lambda$ImageCapture$ImageCaptureRequest$KlqAxzwB-08wcOFrjThjf8ncF2g.run(lambda) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6394) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1000) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:890) at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:107) Caused by: java.util.concurrent.CancellationException: Request is canceled. at androidx.camera.core.ImageCapture.clearPipeline(ImageCapture.java:485) at androidx.camera.core.ImageCapture.lambda$createPipeline$3$ImageCapture(ImageCapture.java:462) at androidx.camera.core.-$$Lambda$ImageCapture$Pgyx9UAVlv_6AWTYhheL71llVHA.onError(lambda) at androidx.camera.camera2.internal.Camera2CameraImpl.lambda$postSurfaceClosedError$14(Camera2CameraImpl.java:1175) at androidx.camera.camera2.internal.-$$Lambda$Camera2CameraImpl$mXKgpn7oCoUsbBlL_FtX0cw1qkM.run(lambda) at android.os.Handler.handleCallback(Handler.java:751)  at android.os.Handler.dispatchMessage(Handler.java:95)  at android.os.Looper.loop(Looper.java:154)  at android.app.ActivityThread.main(ActivityThread.java:6394)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1000)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:890)  at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:107) 

and little different ImageCaptureException with my personal implementation, but same result (just stop preview and then take picture)

idx.camera.core.impl.DeferrableSurface$SurfaceClosedException: Cannot begin use on a closed surface. at androidx.camera.core.impl.DeferrableSurface.incrementUseCount(DeferrableSurface.java:232) at androidx.camera.core.impl.DeferrableSurfaces.incrementAll(DeferrableSurfaces.java:151) at androidx.camera.camera2.internal.SynchronizedCaptureSessionBaseImpl.holdDeferrableSurfaces(SynchronizedCaptureSessionBaseImpl.java:578) at androidx.camera.camera2.internal.SynchronizedCaptureSessionBaseImpl.lambda$openCaptureSession$0$androidx-camera-camera2-internal-SynchronizedCaptureSessionBaseImpl(SynchronizedCaptureSessionBaseImpl.java:152) at androidx.camera.camera2.internal.SynchronizedCaptureSessionBaseImpl$$ExternalSyntheticLambda1.attachCompleter(D8$$SyntheticClass) at androidx.concurrent.futures.CallbackToFutureAdapter.getFuture(CallbackToFutureAdapter.java:102) at androidx.camera.camera2.internal.SynchronizedCaptureSessionBaseImpl.openCaptureSession(SynchronizedCaptureSessionBaseImpl.java:147) at androidx.camera.camera2.internal.SynchronizedCaptureSessionImpl.lambda$openCaptureSession$1$androidx-camera-camera2-internal-SynchronizedCaptureSessionImpl(SynchronizedCaptureSessionImpl.java:128) at androidx.camera.camera2.internal.SynchronizedCaptureSessionImpl$$ExternalSyntheticLambda0.apply(D8$$SyntheticClass) at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.run(ChainingListenableFuture.java:203) at androidx.camera.core.impl.utils.executor.DirectExecutor.execute(DirectExecutor.java:46) at androidx.concurrent.futures.AbstractResolvableFuture.executeListener(AbstractResolvableFuture.java:1053) at androidx.concurrent.futures.AbstractResolvableFuture.addListener(AbstractResolvableFuture.java:668) at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.addListener(CallbackToFutureAdapter.java:210) at androidx.camera.core.impl.utils.futures.ListFuture.addListener(ListFuture.java:198) at androidx.camera.core.impl.utils.futures.FutureChain.addListener(FutureChain.java:135) at androidx.camera.core.impl.utils.futures.Futures.transformAsync(Futures.java:108) at androidx.camera.core.impl.utils.futures.FutureChain.transformAsync(FutureChain.java:82) at androidx.camera.camera2.internal.SynchronizedCaptureSessionImpl.openCaptureSession(SynchronizedCaptureSessionImpl.java:127) at androidx.camera.camera2.internal.SynchronizedCaptureSessionOpener.openCaptureSession(SynchronizedCaptureSessionOpener.java:153) at androidx.camera.camera2.internal.CaptureSession.openCaptureSession(CaptureSession.java:334) at androidx.camera.camera2.internal.CaptureSession.lambda$open$0$androidx-camera-camera2-internal-CaptureSession(CaptureSession.java:210) at androidx.camera.camera2.internal.CaptureSession$$ExternalSyntheticLambda1.apply(D8$$SyntheticClass) 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:1133) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) at java.lang.Thread.run(Thread.java:761)

but if i wait 50 ms for take picture, all works:

cameraProvider?.unbind(preview)

postDelayed( imageCapture?.takePicture.. , 50)

so. how i can correct freeze preview for user when i taking picture?

am i need to

• subscribe to fragmentCameraBinding.viewFinder.previewStreamState
• call unbind preview
• wait until Streamstate changed to IDLE
• and only then take picture?

this both solutions does not look like really correct