title: Android Studio Toolbar Automatically showing up
body: <p>I am a brand new Android developer coming over from iOS development.  All I want to do right now is launch an app with a basic Toolbar using api 21.  However, when I do do, it adds the toolbar underneath a seemingly identical bar.  Upon removing the toolbar, the other bar is still present.  Is this default for all Android apps to have a toolbar with the app name built into the top? How do I add actions/customize this default toolbar?</p>
  
  <p>Here is my xml:</p>
  
  <pre><code>&lt;LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:id="@+id/sample_main_layout"&gt;&lt;/LinearLayout&gt;
  </code></pre>
  
  <p>And here is my main activity:</p>
  
  <p>public class MainActivity extends AppCompatActivity {</p>
  
  <pre><code>@Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      //Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
      //toolbar.setTitle("Groups");
  }
  </code></pre>
  
  <p>}</p>
  
  <p><img src="https://i.stack.imgur.com/BNDQw.png" alt="This is the result of the code I listed"></p>
  
  <p>This is literally the extent of my project, and though I have been searching online for a while everyone says I should be using a Toolbar.  If this is not a Toolbar then what is it then?  I apologize for my naivety.</p>