直播软件app开发，显示和隐藏 Bottom Navigation bar

直播软件app开发，显示和隐藏 Bottom Navigation bar

1、定义viewbinding变量，初始化，并设置界面

定义变量：

 

 private lateinit var binding: ActivityFavDishBinding

​初始化并将布局设置给activity：

 

 
        binding = ActivityFavDishBinding.inflate(layoutInflater)
        setContentView(binding.root)

2、定义controller变量并初始化

定义变量

 

  private lateinit var mNavController : NavController

初始化

 

  mNavController = findNavController(R.id.nav_host_fragment_activity_fav_dish)

3、为actionbar设置controller

 

        setupActionBarWithNavController(mNavController, appBarConfiguration)
        navView.setupWithNavController(mNavController)

4、隐藏底部导航栏

 

 fun hideBottomNavigationView(){
        mBinding.navView.clearAnimation()
        mBinding.navView.animate().translationY(mBinding.navView.height.toFloat()).duration = 300
    }

5、显示底部导航栏

 

    fun showBottomNavigationView(){
        mBinding.navView.clearAnimation()
        mBinding.navView.animate().translationY(0f).duration = 300
    }

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