Landscape preview orientation issue

[Taylor Stephenson]

Hi,

We are having an issue where the preview changes rotation when tilt the phone sideways/landscape. It is only an issue with preview, the capture comes out in the correct orientation and with the full aspect ratio, but it is hard for users to tell what they are going to capture.

This is specific to certain devices. I attached an image of the native camera and our app on the same phone to compare.

It might be similar to huawei meteX2, preview on landscape has wrong rotation. [262114753] - Visible to Public - Issue Tracker (google.com), but I'm not sure. And I don't know what I need to change to get it working.

Info:

- Spectralink Versity 9540
- Android 8.1.0
- CameraX 1.1.0 and 1.2.0
- our app's layouts are screenOrientation = portrait

Our OrientationListener set the same values for preview.targetRotation on a working and not working device.

ImplementationMode.COMPATIBLE didn't seem to make a difference.


Appreciate any help,
Taylor

[Scott Nien]

Can you share how you set the targetRotation in the  OrientationListener?  
I think you probably don't need to set any targetRotation in Preview as it is mainly for some special cases.  

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[Taylor Stephenson]

I tried not setting preview.targetRotation and it seems to have resolved the issue. Thanks!


We set targetRotation like this: CameraX use case rotations  |  Android Developers.  Except it was set for Preview & ImageCapture because those are our use cases. We were trying to support the "Locked Orientation" case from this table: 

https://developer.android.com/training/camerax/orientation-rotation#device-supported-orientations

I guess I misunderstood the documentation and thought I should also set it for the preview use case.

[Scott Nien]

Glad that it worked!
Looks like the documentation can do better to avoid the issue you ran into.  We will see how we can improve it. Thanks for letting us know.