config.setFocusMode

[zygoh1986]

I am trying to get my google pixel 4a rear camera to auto focus on the marker.

I am not able to focus till i onPause and return to the app. The auto focus works perfectly well.

May i know why didn't it auto focus when i first initiate the camera?

Thanks in advance!

[RGregat]

If possible, please attach the Video you showed me

[zygoh1986]

Sure. Please see attached video. https://user-images.githubusercontent.com/69612872/137099811-644805a6-c64d-42e4-a026-6a4fc98affa3.MOV

[MarcoGoe]

I had the same issue. Try to call session.resume() in onSessionConfiguration. This works for me:

override fun onSessionConfiguration(session: Session?, config: Config?) {

    if (session?.isDepthModeSupported(Config.DepthMode.AUTOMATIC) == true) {
         config?.depthMode = Config.DepthMode.AUTOMATIC
     }

     config?.focusMode = Config.FocusMode.AUTO

     session?.configure(config)
     session?.resume()
}

In general the auto focus is not really reliable with sceneform. Somethimes you have to wait a few seconds and move your camera back and forth to get the focus on an object. Does anybody know optimizations to get a faster and more reliable focus?

[ThomasGorisse]

This sounds more like an ARCore issue.

Can you create an issue on the ARCore repo to have more infos about how the autofocus should be configured ?

[ThomasGorisse]

The FocusMode.AUTO is already set by default before the session?.resume() but there seems to have an issue when the 2 calls or done without waits.

[monsterbrain]

Yes. This bug was there when we did ARCore samples, in several device models.

A dirty-hack we did was to start an empty activity and finish it immediately 😉

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