Clicking hamburger icon on Toolbar does not open Navigation Drawer

Question

I have a simple android.support.v7.widget.Toolbar and all I am trying to do is to open a NavigationDrawer by pressing the \"hamburger\" icon in the top left cor

Answer 1

I fixed it by giving openable which is drawerLayout to navigateUp function.

More info navigateUp Doc

 override fun onSupportNavigateUp(): Boolean {
    val navController = this.findNavController(R.id.host_fragment)
    return NavigationUI.navigateUp(navController,drawer_layout)
}