Navigation+BottomNavigationView实现的tab效果重建fragment问题
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Navigation+BottomNavigationView实现的tab效果重建fragment问题
由于这个控件内部实现会导致fragment频繁重建。因此我们需要对它的listener做一点定制,来处理这个问题
val periodManagerFragment: Fragment = PeriodManagerFragment()
val mineFragment: Fragment = MineFragment()
private fun initNavigationView()
val navView = uiViewBinding.navView
navView.setBackgroundColor(resources.getColor(R.color.colorBottomNavigationViewBackgroundColor))
val navController = findNavController(R.id.nav_host_fragment)
navView.setupWithNavController(navController)
var active = periodManagerFragment
supportFragmentManager.beginTransaction().add(R.id.nav_host_fragment, mineFragment, "2")
.hide(mineFragment).commit()
supportFragmentManager.beginTransaction()
.add(R.id.nav_host_fragment, periodManagerFragment, "1").commit()
navView.setOnNavigationItemReselectedListener
navView.setOnNavigationItemSelectedListener
when (it.itemId)
R.id.navigation_home ->
supportFragmentManager.beginTransaction().hide(active)
.show(periodManagerFragment).commit()
active = periodManagerFragment
R.id.navigation_mine ->
supportFragmentManager.beginTransaction().hide(active).show(mineFragment)
.commit()
active = mineFragment
return@setOnNavigationItemSelectedListener true
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