如何在底部片段代码中添加滑动

Question

我的底部导航代码正常运行，但是交换无效，如何添加交换代码？

我在Kotlin中使用了片段导航和底部导航

private val mOnNavigationItemSelectedListener=BottomNavigationView.OnNavigationItemSelectedListener { item ->
        when (item.itemId) {
            R.id.navigation_shop -> {
                // toolbar!!.title="live Track"
                fragment=StoreFragment()
                loadFragment(fragment)
                return@OnNavigationItemSelectedListener true
            }

            R.id.navigation_gifts -> {
                //toolbar!!.title="Team Management"
                fragment=GiftsFragment()
                loadFragment(fragment)
                return@OnNavigationItemSelectedListener true
            }

            R.id.navigation_cart -> {
                //toolbar!!.title="All task"
                fragment=CartFragment()
                loadFragment(fragment)
                return@OnNavigationItemSelectedListener true
            }

            R.id.navigation_profile -> {
                // toolbar!!.title="Report"
                fragment=ProfileFragment()
                loadFragment(fragment)
                return@OnNavigationItemSelectedListener true
            }
        }

        true
    }

Answer 1

底部导航栏不应为您的片段提供滑动。如果要滑动，则必须在导航栏中使用view-pager。

看看 https://developer.android.com/reference/android/support/v4/view/ViewPager