问题导航抽屉，Android，Kotlin

Question

I wanted to make a side menu for my android application. To do this, in MainActivity, I changed the root layout element from ConstraintLayout to DrawerLayout, added my own toolbar, and then wrote the side menu code. But when I started testing the app on my phone, the elements of my start fragment(fragment_start) moved to the right. I sat all day, but did not understand what was the mistake, where did I screw up? And there are a couple of questions in connection with this: Why is the hamburger not displayed on the toolbar, although I added the code for this ( appBarConfig = AppBarConfiguration(navController.graph,binding.drawerLayout) )? How can I make the side menu open only in the fragment that I need, and not in the whole application?

My code:

activyty_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:id="@+id/drawer_layout"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_centerVertical="true"

        >

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#FF3700B3"
            android:minHeight="?attr/actionBarSize"
            app:title="Отель"/>

        <fragment
            android:id="@+id/fragmentContainerView"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:defaultNavHost="true"
            app:navGraph="@navigation/navigation" />
    </LinearLayout>

    <com.google.android.material.navigation.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="right"
        android:fitsSystemWindows="true"
        app:menu="@menu/main_menu"
        />


</androidx.drawerlayout.widget.DrawerLayout>

main_menu

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:icon="@drawable/ic_menu"
        android:id="@+id/fragment_registration"
        android:title="Settings" />
    <item
        android:id="@+id/fragment_admin"
        android:title="About" />
</menu>

fragment_start.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".start.StartFragment"
   >

    <EditText
        android:id="@+id/editInputEmail"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="150dp"
        android:layout_marginStart="80dp"
        android:background="@drawable/edit_text_style"
        android:ems="10"
        android:gravity="center"
        android:inputType="textPersonName"
        android:minHeight="48dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="SpeakableTextPresentCheck" />

    <EditText
        android:id="@+id/editInputPassword"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="80dp"
        android:layout_marginTop="300dp"
        android:background="@drawable/edit_text_style"
        android:ems="10"
        android:gravity="center"
        android:inputType="textPassword"
        android:minHeight="48dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="SpeakableTextPresentCheck" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:text="Email"
        android:textColor="@color/black"
        android:textSize="30dp"
        app:layout_constraintEnd_toEndOf="@+id/textView2"
        app:layout_constraintStart_toStartOf="@+id/textView2"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="60dp"
        android:layout_marginBottom="12dp"
        android:text="Password"
        android:textColor="@color/black"
        android:textSize="30dp"
        app:layout_constraintBottom_toTopOf="@+id/editInputPassword"
        app:layout_constraintStart_toStartOf="@+id/editInputPassword" />

    <Button
        android:id="@+id/button_login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="25dp"
        android:layout_marginBottom="30dp"
        android:backgroundTint="#FFFFFFFF"
        android:text="Log In"
        android:textColor="@color/black"
        app:layout_constraintBottom_toTopOf="@+id/button_registr"
        app:layout_constraintStart_toStartOf="@+id/button_registr"
        app:strokeColor="#5584E6"
        app:strokeWidth="3dp" />

    <Button
        android:id="@+id/button_registr"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="140dp"
        android:layout_marginTop="100dp"
        android:backgroundTint="#FFFFFFFF"
        android:text="Registration"
        android:textColor="@color/black"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editInputPassword"
        app:strokeColor="#5584E6"
        app:strokeWidth="3dp" />


</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.example.hotel2


class MainActivity : AppCompatActivity() {

    private lateinit var binding: ActivityMainBinding
    lateinit var appBarConfig: AppBarConfiguration



    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        val view = binding.root
        setContentView(view)
        APP_ACTIVITY = this


        setSupportActionBar(androidx.appcompat.widget.Toolbar(this))
        val navController = findNavController(R.id.fragmentContainerView)
        appBarConfig = AppBarConfiguration(navController.graph,binding.drawerLayout)
        setupActionBarWithNavController(navController, appBarConfig)
        binding.navView.setupWithNavController(navController)


    }

    override fun onSupportNavigateUp(): Boolean {
        val navController = findNavController(R.id.fragmentContainerView)
        return navController.navigateUp(appBarConfig) || super.onSupportNavigateUp()
    }

}

Answer 1

It's worked perfect before adding drawer . Nope , it doesn't.

What with my layout?

Currently, your views are not properly attached to constraints that lead to inconsistence behavior, such as jumping to the top left corner of the screen. You better check constraint layout docs or videos . android:layout_gravity="right" in navigation view may crash the app, use start instead. Also, you can replace constraint with linear layout , it simpler and fits to your view requirements.

Where is my menu icon?

Idk, some strange behavior occurs while working with setSupportActionBar() . But you can setup toolbar directly toolbar.setupWithNavController(navController, appBarConfig) .

How to control drawer state?

You can listen destination changes navController.addOnDestinationChangedListener() and lock drawer in particular screens drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED) and vise-verse.

FYI material drawer guideline , nav components & ui .

Answer 2

The first screenshot is as shown on the phone The second is how it should be