Same Navigation Drawer in different Activities

Question

I made a working navigation drawer like it\'s shown in the tutorial on the developer.android.com website. But now, I want to use one Navigation Drawer, i created in the Navi

Answer 1

I do it in Kotlin like this:

open class BaseAppCompatActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {

protected lateinit var drawerLayout: DrawerLayout
protected lateinit var navigationView: NavigationView
@Inject
lateinit var loginService: LoginService

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    Log.d("BaseAppCompatActivity", "onCreate()")
    App.getComponent().inject(this)
    drawerLayout = findViewById(R.id.drawer_layout) as DrawerLayout

    val toolbar = findViewById(R.id.toolbar) as Toolbar
    setSupportActionBar(toolbar)

    navigationView = findViewById(R.id.nav_view) as NavigationView
    navigationView.setNavigationItemSelectedListener(this)

    val toggle = ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)

    drawerLayout.addDrawerListener(toggle)
    toggle.syncState()
    toggle.isDrawerIndicatorEnabled = true

    val navigationViewHeaderView = navigationView.getHeaderView(0)
    navigationViewHeaderView.login_txt.text = SharedKey.username
}
private inline fun  launch():Boolean{
    if(this is T) return closeDrawer()
    val intent = Intent(applicationContext, T::class.java)
    startActivity(intent)
    finish()
    return true
}

private fun closeDrawer(): Boolean {
    drawerLayout.closeDrawer(GravityCompat.START)
    return true
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
    val id = item.itemId

    when (id) {
        R.id.action_tasks -> {
            return launch()
        }
        R.id.action_contacts -> {
            return launch()
        }
        R.id.action_logout -> {
            createExitDialog(loginService, this)
        }
    }
    return false
}
}

Activities for drawer must inherit this BaseAppCompatActivity, call super.onCreate after content is set (actually, can be moved to some init method) and have corresponding elements for ids in their layout