android 11 上 imageCapture 用例的camerax“未绑定到有效相机”

我一直收到错误

未绑定到有效相机

当尝试实现 imageCapture 用例时。我正在按照camerax教程在Java中实现该功能here https://codelabs.developers.google.com/codelabs/camerax-getting-started#4.

预览用例绑定正确，我可以在启动活动时访问相机，但是当我点击“拍照”按钮时，出现以下错误：

Photo capture failed: ${exception.message}
    androidx.camera.core.ImageCaptureException: Not bound to a valid Camera [ImageCapture:androidx.camera.core.ImageCapture-9aad1b57-8fb6-4a6e-b528-9347343369b6]
        at androidx.camera.core.ImageCapture.lambda$sendImageCaptureRequest$6$ImageCapture(ImageCapture.java:825)
        at androidx.camera.core.-$$Lambda$ImageCapture$2B91NcXQyr59NDscigcxsZb94mc.run(Unknown Source:4)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

有人面临类似的问题吗？有什么指点吗？

cameraProvider.bindToLifecycle(
   this, cameraSelector, preview, imageCapture)