Android - Error when inflate Menu Item into Actionbar

I have the following problem, I need to inflate just one item (logout) to the ActionBar displayed in the LoginActivity. But it throws an "unexpected EOF!". So I have tried different ways of inflating the item to showing it up in the action bar but still without good results, at the end I've put the error message.

This is an image of example (what is showing) no item showed..

My code is the following:

app/java/package/MainActivity.

    public class MainActivity extends AppCompatActivity {


    CircleImageView profile_image;
    TextView username;

    FirebaseUser firebaseUser;
    DatabaseReference reference;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar();

        profile_image = findViewById(R.id.profile_image);
        username = (TextView) findViewById(R.id.userId);

        firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        reference = FirebaseDatabase.getInstance().getReference("Users").child(firebaseUser.getUid());

        reference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                User2 user = dataSnapshot.getValue(User2.class);
                System.out.println(user);
                Log.d("Userz",user.getUsername());
                username.setText(user.getUsername().toString());
                if(user.getImageURL().equals("default")){
                    profile_image.setImageResource(R.mipmap.ic_launcher);
                } else {
                    Glide.with(MainActivity.this).load(user.getImageURL()).into(profile_image);
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        //getMenuInflater().inflate(R.menu.menu,menu);
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item){
        Log.d("Itemid",item.toString());
        switch(item.getItemId()){
            case R.id.logoutItem:
                FirebaseAuth.getInstance().signOut();
                startActivity(new Intent(MainActivity.this, StartActivity.class));
                finish();
                return true;
        }

        return false;
    }
}

app/res/menu/menu.xml:

    <?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:id="@+id/logoutItem"
        android:title="Logout"
        app:showAsAction="always"

        />
</menu>

app/res/layout/activity_main.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">


        <android.support.v7.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimaryDark"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:popupTheme="@style/MenuStyle">


            <de.hdodenhof.circleimageview.CircleImageView
                android:layout_width="30dp"
                android:layout_height="30dp"
                android:id="@+id/profile_image"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/userId"
                android:text="username"
                android:textColor="#fff"
                android:layout_marginLeft="25dp"
                android:layout_marginStart="25dp"
                android:textStyle="bold"/>
        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout>

</LinearLayout>

Error Message:

at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at android.support.v7.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:631)
        at android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:518)
        at android.support.v7.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:403)
        at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:191)
        at com.affinity.affinityteam.firebase_chat_try2.MainActivity.onCreateView(MainActivity.java:40)
        at android.app.Activity.onCreateView(Activity.java:6184)
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:389)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at android.support.v7.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:631)
        at android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:518)
        at android.support.v7.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:403)
        at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:191)
        at com.affinity.affinityteam.firebase_chat_try2.MainActivity.onCreateView(MainActivity.java:40)
        at android.app.Activity.onCreateView(Activity.java:6184)
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:389)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at android.support.v7.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:631)
        at android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:518)
        at android.support.v7.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:403)
        at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:191)
        at com.affinity.affinityteam.firebase_chat_try2.MainActivity.onCreateView(MainActivity.java:40)
        at android.app.Activity.onCreateView(Activity.java:6184)
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:389)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at android.support.v7.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:631)
        at android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:518)
        at android.support.v7.app.AppCompatDelegateImpl.findViewById(AppCompatDelegateImpl.java:403)
        at android.support.v7.app.AppCompatActivity.findViewById(AppCompatActivity.java:191)
        at com.affinity.affinityteam.firebase_chat_try2.MainActivity.onCreateView(MainActivity.java:40)
        at android.app.Activity.onCreateView(Activity.java:6184)
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:389)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)

    read: unexpected EOF!