How to zoom Camera?

[Pinkal7600]

I have tried to zoom camera with below code. Please check and correct me where I am wrong.

First I get a Preview from CameraX and tried to perform zoom using Preview like below.

   var config = CameraX.getDefaultUseCaseConfig(PreviewConfig::class.java, lensFacing)
   var preview = Preview(config)
   preview.zoom(zoom)

After preview.zoom() I just bind again with CameraX and get some error and it's not working.

   CameraX.bindToLifecycle(this, preview, imageCapture, videoCapture)

When the above code was not working, I also tried with CameraX.unbindAll() first and then I call CameraX.bindToLifecycle(). But face some error again and not get succeed.

Please provide an answer on below question or add some description in Wiki or Readme file related to the below question.

1. How we can zoom camera?
2. How to get max zoom from CameraX?

And also if possible please provide how to manage flash with CameraX?

Thank you!

[owahltinez]

This issue is unrelated to the sample, for issues related to the library please use StackOverflow using the android-camerax tag or the relevant component in Android's issue tracker.

To answer your question, take a look at https://developer.android.com/reference/androidx/camera/core/Preview.html#zoom(android.graphics.Rect). The Rect passed as a parameter should correspond to what you would set for Camera2's crop region parameter.

[owahltinez]

Please see the CameraControl class which will implement methods for zoom

[ktchernov]

@owahltinez the Preview#zoom documentation does not answer either of the two questions, which would be quite common.

The Android issue tracker is for logging bugs, not for asking questions.

It would be good for the official sample project to demonstrate what is quite common functionality, which is not otherwise sufficiently covered in the documentation.

[Pinkal7600]

Zoom API is now available from CameraX Team.
Please check my answer for more details.
StackOverflow: https://stackoverflow.com/a/59855737/7235539

Thanks to CameraX Team.