如何在 Kotlin 中更改抽屉导航图标？答案

【问题标题】：How to change Drawer Navigation Icon in Kotlin?如何在 Kotlin 中更改抽屉导航图标？
【发布时间】：2020-12-29 03:01:20
【问题描述】：

这是我想以编程方式编辑抽屉导航汉堡图标的 ActivityHome.kt 代码的 onCreate 方法。

`override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_home)
    val toolbar: Toolbar = findViewById(R.id.toolbar)
    setSupportActionBar(toolbar)


    val drawerLayout: DrawerLayout = findViewById(R.id.drawer_layout)
    val navView: NavigationView = findViewById(R.id.nav_view)
    val navController = findNavController(R.id.nav_host_fragment)
    // Passing each menu ID as a set of Ids because each
    // menu should be considered as top level destinations.
    appBarConfiguration = AppBarConfiguration(
        setOf(
            R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow
        ), drawerLayout
    )
    setupActionBarWithNavController(navController, appBarConfiguration)
    navView.setupWithNavController(navController)


}`

【问题讨论】：

标签： android kotlin navigation-drawer

【解决方案1】：

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_home)
        val toolbar: Toolbar = findViewById(R.id.toolbar)
        setSupportActionBar(toolbar)


        val drawerLayout: DrawerLayout = findViewById(R.id.drawer_layout)
        val navView: NavigationView = findViewById(R.id.nav_view)
        val navController = findNavController(R.id.nav_host_fragment)
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        appBarConfiguration = AppBarConfiguration(
            setOf(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow
            ), drawerLayout
        )
        setupActionBarWithNavController(navController, appBarConfiguration)
        navView.setupWithNavController(navController)


        // Add these three lines
        supportActionBar!!.setDisplayHomeAsUpEnabled(true)
        supportActionBar!!.setDefaultDisplayHomeAsUpEnabled(false)
        supportActionBar!!.setHomeAsUpIndicator(R.drawable.ic_back)


    }

【讨论】：