当我使用 camerax "1.0.0-alpha06" 时，为什么 zoomRatio 会显示错误 Unresolved reference？

Question

我已经阅读了文章。https://proandroiddev.com/android-camerax-tap-to-focus-pinch-to-zoom-zoom-slider-eb88f3aa6fc6

我将代码 A 添加到 officecamerx 示例中。 https://github.com/android/camera-samples/tree/master/CameraXBasic

示例代码使用camerax“1.0.0-alpha06”

我收到错误未解决的缩放比例参考，您可以看到图 1，我该如何解决？

代码 A

 private fun setUpPinchToZoom() {
        val cameraControl = CameraX.getCameraControl(lensFacing)
        val cameraInfo = CameraX.getCameraInfo(lensFacing)

        val listener = object : ScaleGestureDetector.SimpleOnScaleGestureListener() {
            override fun onScale(detector: ScaleGestureDetector): Boolean {
                val currentZoomRatio: Float = cameraInfo.zoomRatio.value ?: 0F
                val delta = detector.scaleFactor
                cameraControl.setZoomRatio(currentZoomRatio * delta)
                return true
            }
        }

        val scaleGestureDetector = ScaleGestureDetector(context, listener)

        viewFinder.setOnTouchListener { _, event ->
            scaleGestureDetector.onTouchEvent(event)
            return@setOnTouchListener true
        }
    }

图 1

Answer 1

1.0.0-alpha07 版本中添加了缩放控件。您需要更新代码以至少使用camera-Core版本1.0.0-alpha07：https://developer.android.com/jetpack/androidx/releases/camera