Android 如何在Kotlin中设置ViewDragHelper灵敏度？

我使用Kotlin中的SwipeBackActivity库。此库在滑动活动时使用ViewDragHelper。这是这个库中的一些代码

   private final androidx.customview.widget.ViewDragHelper viewDragHelper;

private class ViewDragHelperCallBack extends androidx.customview.widget.ViewDragHelper.Callback {
    private ViewDragHelperCallBack() { /* compiled code */ }

    public boolean tryCaptureView(android.view.View child, int pointerId) { /* compiled code */ }

    public int getViewVerticalDragRange(android.view.View child) { /* compiled code */ }

    public int getViewHorizontalDragRange(android.view.View child) { /* compiled code */ }

    public int clampViewPositionVertical(android.view.View child, int top, int dy) { /* compiled code */ }

    public int clampViewPositionHorizontal(android.view.View child, int left, int dx) { /* compiled code */ }

    public void onViewDragStateChanged(int state) { /* compiled code */ }

    public void onViewPositionChanged(android.view.View changedView, int left, int top, int dx, int dy) { /* compiled code */ }

    public void onViewReleased(android.view.View releasedChild, float xvel, float yvel) { /* compiled code */ }
}

我想设置阻力灵敏度。有人就github的问题编写了此代码

  viewDragHelper = ViewDragHelper.create(this, 0.1f, new ViewDragHelperCallBack());

但是我找不到如何使用这个代码。如何在Kotlin中定义viewDragHelper？如何在项目中设置viewDragHelper