Friday, 29 November 2019

How can I display a negative mode preview with CameraX in Android?

I'm learning CameraX API, and CameraXBasic is a office sample code.

CameraFragment.kt in CameraXBasic project displays a real camera preview.

Now I hope to display a negative mode preview. How can I do with CameraX API? Is there a sample code?

CameraFragment.kt

private lateinit var viewFinder: TextureView

private fun bindCameraUseCases() {
    // Get screen metrics used to setup camera for full screen resolution
    val metrics = DisplayMetrics().also { viewFinder.display.getRealMetrics(it) }
    val screenAspectRatio = Rational(metrics.widthPixels, metrics.heightPixels)
    Log.d(TAG, "Screen metrics: ${metrics.widthPixels} x ${metrics.heightPixels}")

    // Set up the view finder use case to display camera preview
    val viewFinderConfig = PreviewConfig.Builder().apply {
        setLensFacing(lensFacing)
        // We request aspect ratio but no resolution to let CameraX optimize our use cases
        setTargetAspectRatio(screenAspectRatio)
        // Set initial target rotation, we will have to call this again if rotation changes
        // during the lifecycle of this use case
        setTargetRotation(viewFinder.display.rotation)
    }.build()

    // Use the auto-fit preview builder to automatically handle size and orientation changes
    preview = AutoFitPreviewBuilder.build(viewFinderConfig, viewFinder)

 ....

 CameraX.bindToLifecycle(
            viewLifecycleOwner, preview, imageCapture, imageAnalyzer)
}


from How can I display a negative mode preview with CameraX in Android?

No comments:

Post a Comment