camerax_pinch_to_zoom.kt

// Listen to pinch gestures
val listener = object : ScaleGestureDetector.SimpleOnScaleGestureListener() {
    override fun onScale(detector: ScaleGestureDetector): Boolean {
        // Get the camera's current zoom ratio
        val currentZoomRatio = cameraInfo.zoomState.value?.zoomRatio ?: 0F
        
        // Get the pinch gesture's scaling factor 
        val delta = detector.scaleFactor
        
        // Update the camera's zoom ratio. This is an asynchronous operation that returns
        // a ListenableFuture, allowing you to listen to when the operation completes.
        cameraControl.setZoomRatio(currentZoomRatio * delta)
        
        // Return true, as the event was handled
        return true
    }
}
val scaleGestureDetector = ScaleGestureDetector(context, listener)

// Attach the pinch gesture listener to the viewfinder
previewView.setOnTouchListener { _, event ->
    scaleGestureDetector.onTouchEvent(event)
    return@setOnTouchListener true
}

i found this error, can you help me ?

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.view.ScaleGestureDetector.(ScaleGestureDetector.java:237)
at android.view.ScaleGestureDetector.(ScaleGestureDetector.java:217)
at id.t_rec.app.modules.absentx.AbsentXActivity.startCamera(AbsentXActivity.kt:126)