//模擬手動移動viewpager2
    private fun startAnimator(viewPager2: ViewPager2) {
        Thread {
            viewPager2.beginFakeDrag()
            for (i in 1..40) {
                Thread.sleep(15)
                Handler(Looper.getMainLooper()).post { viewPager2.fakeDragBy(-viewPager2.width.toFloat() / 40) }
            }
            viewPager2.endFakeDrag()
        }.start()
    }