viewpager2降低水平滚动的灵敏度

import android.content.Context
import android.util.AttributeSet
import android.view.GestureDetector
import android.view.MotionEvent
import androidx.viewpager2.widget.ViewPager2

class LessSensitiveViewPager2 @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null
) : ViewPager2(context, attrs) {

    private val gestureDetector = GestureDetector(context, LessSensitiveGestureListener())

    override fun onTouchEvent(ev: MotionEvent?): Boolean {
        return gestureDetector.onTouchEvent(ev) || super.onTouchEvent(ev)
    }

    private inner class LessSensitiveGestureListener : GestureDetector.SimpleOnGestureListener() {
        override fun onFling(e1: MotionEvent, e2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
            // 减少滑动速度
            val reducedVelocityX = velocityX / 2f
            return super.onFling(e1, e2, reducedVelocityX, velocityY)
        }

        override fun onScroll(e1: MotionEvent, e2: MotionEvent, distanceX: Float, distanceY: Float): Boolean {
            // 减少滚动距离
            val reducedDistanceX = distanceX / 2f
            return super.onScroll(e1, e2, reducedDistanceX, distanceY)
        }
    }
}

import android.view.View
import androidx.viewpager2.widget.ViewPager2

class LessSensitivePageTransformer : ViewPager2.PageTransformer {
    override fun transformPage(page: View, position: Float) {
        // 可以在这里调整页面的缩放或透明度等属性
        val scaleFactor = Math.max(0.75f, 1 - Math.abs(position))
        page.scaleX = scaleFactor
        page.scaleY = scaleFactor
    }
}

// 在你的 Activity 或 Fragment 中设置 PageTransformer
viewPager2.setPageTransformer(LessSensitivePageTransformer())

viewPager2.isUserInputEnabled = false

// 手动处理滑动事件
viewPager2.setOnTouchListener { v, event ->
    // 自定义滑动逻辑
    when (event.action) {
        MotionEvent.ACTION_DOWN -> {
            // 记录按下时的位置
            downX = event.x
            true
        }
        MotionEvent.ACTION_MOVE -> {
            val deltaX = event.x - downX
            if (Math.abs(deltaX) > SWIPE_THRESHOLD) {
                if (deltaX > 0) {
                    viewPager2.currentItem = viewPager2.currentItem - 1
                } else {
                    viewPager2.currentItem = viewPager2.currentItem + 1
                }
                downX = event.x
            }
            true
        }
        else -> false
    }
}

companion object {
    private var downX = 0f
    private const val SWIPE_THRESHOLD = 100f // 调整这个值来控制灵敏度
}