ActionBar não aparecem

esse é meu xml   FormularioActivity





<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#795548">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">



        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Nome"
            android:id="@+id/formulario_nome"/>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Deixe aqui o seu Feedback sobre o local"
            android:id="@+id/formulario_feedback"/>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Telefone"
            android:id="@+id/formulario_telefone"/>


        <RatingBar
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:max="10"
            android:numStars="5"
            android:id="@+id/formulario_nota"/>

    </LinearLayout>

</ScrollView>

esse é minha classe FormularioActivity



package com.chatbus.chat.chatbus.activity;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

import com.chatbus.chat.chatbus.Dao.UsuariosDAO;
import com.chatbus.chat.chatbus.Model.Usuarios;
import com.chatbus.chat.chatbus.R;

public class FormularioActivity extends AppCompatActivity {

    private FormularioHelper helper;//crinado um atributo

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

        helper = new FormularioHelper(this);


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {//criando menu
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_formulario, menu); //chamando menu do formulario
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) { //toda vez que o metodo for clicado
        switch (item.getItemId()){
            case R.id.menu_formulario_ok:
                Usuarios usuarios = helper.getUsuarios();
                UsuariosDAO dao = new UsuariosDAO(this);
                dao.insere(usuarios);

                break;
        }
        return super.onOptionsItemSelected(item);
    }
}

print da tela

https://imgur.com/a/Ggqt6

https://imgur.com/a/XyU4X