How to get an Android Camera2 with 1:1 ratio like Instagram?

Question

My question is very simple:

How to get an Android android.hardware.Camera2 with 1:1 ratio and without deformation like Instagram?

Answer 1

I did it with the Layout, in that way, google code can be keeped as it comes and automatically set a 1:1 preview based on the UI.

Just put the AutoFitTextureView inside a ConstraintLayout and then

previewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class), width, height, videoSize); does all the magic