只需将此添加到根Activity中。

if (supportFragmentManager.backStackEntryCount > 0) {
  supportActionBar!!.setDisplayHomeAsUpEnabled(true)
  toolbar.setNavigationOnClickListener {
      if (supportFragmentManager.backStackEntryCount > 0) {
          super.onBackPressed()
      } else {
          supportActionBar!!.setDisplayHomeAsUpEnabled(false)
          drawerLayout.addDrawerListener(toggle)
          toggle.syncState()
          drawerLayout.openDrawer(GravityCompat.START)
      }
  }
} else {
  supportActionBar!!.setDisplayHomeAsUpEnabled(false)
  drawerLayout.addDrawerListener(toggle)
  toggle.syncState()
}

在您的活动中尝试此操作

NavigationView nav_view = (NavigationView) findViewById(R.id.nav_view);
          drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        NavHostFragment navHostFragment = (NavHostFragment) getSupportFragmentManager().findFragmentById(R.id.nav_host_fragment);

        appBarConfiguration =
                new AppBarConfiguration.Builder(navController.getGraph()).build();
        setupActionBarWithNavController(this, navController,appBarConfiguration);
        NavigationUI.setupWithNavController(nav_view, navController);
        NavigationUI.setupActionBarWithNavController(this, navController);
        NavigationUI.setupActionBarWithNavController(this, navController, drawer);

我在AppBarConfiguration中设置了多个片段。

appBarConfiguration = AppBarConfiguration(
    setOf(
        R.id.nav_main, R.id.nav_detail
    ), drawerLayout
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)

由于详细信息片段是在AppBarConfiguration中设置的，因此当从主片段导航到详细信息片段时，汉堡菜单图标保持不变，因为详细信息片段被设置为drawerlayout之一。
从AppBarConfiguration中删除R.id.nav_detail后，导航到detail片段，汉堡菜单图标将自动更改为带有DrawerArrowDrawable动画的后退箭头图标。

appBarConfiguration = AppBarConfiguration(
    setOf(
        R.id.nav_main
    ), drawerLayout
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)