如何在底部片段代码中添加滑动

Question

>我有底部导航代码，它工作正常，但交换不起作用如何添加交换代码？

我在 kotlin 中使用了片段和底部导航

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

底部导航栏不会为您的片段提供滑动。如果要滑动，则必须在导航栏中使用视图页。

看一看https://developer.android.com/reference/android/support/v4/view/ViewPager