getCurrentParameters()/getCapabilities().whenAvailable{} returns null if called too early

[jpribble]

What are you trying to achieve or the steps to reproduce?

I'm trying to call Fotoapparat.getCurrentParameters().whenAvailable { ... } and Fotoapparat.getCapabilities().whenAvailable { ... } in my Activity's onStart().

override fun onStart() {
  super.onStart()
  camera.start()
  camera.getCurrentParameters().whenAvailable { … }
  camera.getCapabilities().whenAvailable { … }
}

How did you initialize FA?

override fun onCreate() {
  super.onCreate()
  …
  camera = Fotoapparat
    .with(this)
    .into(cameraView!!)
    .previewScaleType(ScaleType.CenterCrop)
    .photoResolution([custom_selector])
    .previewResolution([custom_selector])
    .lensPosition(single(LensPosition.Back))
    .focusMode(firstAvailable(
        continuousFocusPicture(),
        autoFocus(),
        fixed()))
    .flash(off())
    .frameProcessor { … }
    .previewFpsRange(highestFps())
    .cameraErrorCallback { … }
    .logger(logcat())
    .build()
}

What was the result you received?

Both calls return NULL and the log shows "Couldn't deliver pending result":

01-05 15:48:56.884 9089-9089/[package_name] D/Fotoapparat: Fotoapparat: getCapabilities
01-05 15:48:56.887 9089-13521/[package_name] D/Fotoapparat: CameraDevice: getParameters
01-05 15:48:56.888 9089-13094/[package_name] D/Fotoapparat: Couldn't deliver pending result.

What did you expect?

I expect the calls to return valid results and delay their async callbacks if the camera is still initializing.

Context:

• FA version: 2.0.2
• Devices/APIs affected: Samsung Galaxy S8 running Android 7.0.
• Other Notes: This used to work in version 1.5.0.

[Diolor]

(same will happen for current parameters)

[Diolor]

Explicit, improved logs in #181

[jpribble]

I'm still seeing this issue when testing the latest master code. Here are the logs:

01-18 10:52:17.208 11349-11349/ D/Fotoapparat: Fotoapparat:
01-18 10:52:17.228 11349-11349/ D/Fotoapparat: Fotoapparat: start
01-18 10:52:17.228 11349-11349/ D/Fotoapparat: Fotoapparat: getCurrentParameters
01-18 10:52:17.228 11349-12587/ D/Fotoapparat: Device: selectCamera
01-18 10:52:17.228 11349-12587/ D/Fotoapparat: CameraDevice: open
01-18 10:52:17.228 11349-11349/ D/Fotoapparat: Fotoapparat: getCapabilities
01-18 10:52:17.228 11349-12975/ D/Fotoapparat: CameraDevice: getParameters$suspendImpl
01-18 10:52:17.368 11349-12587/ D/Fotoapparat: CameraDevice: getCapabilities$suspendImpl
01-18 10:52:17.368 11349-12587/ D/Fotoapparat: CameraDevice: updateParameters$suspendImpl
01-18 10:52:17.368 11349-12975/ D/Fotoapparat: CameraDevice: getCapabilities$suspendImpl
01-18 10:52:17.368 11349-12590/ D/Fotoapparat: Couldn't deliver pending result: Operation failed internally.
01-18 10:52:17.368 11349-12587/ D/Fotoapparat: New camera parameters are: CameraParameters ...

[dmitry-zaitsev]

I believe that pull request will fix it #188