Ao executar meu aplicativo não aparece a barra superior, segue o print no link abaixo
http://i.imgur.com/chgzypC.jpg
AndroidManifest.xml
<application android:allowBackup="true" android:label="@string/app_name"
android:icon="@mipmap/ic_launcher" android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".ListaAlunosActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".FormularioActivity"></activity>
</application>
</manifest>menu_lista_alunos.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/novo"
android:title="Novo"/>
<item android:id="@+id/mapa"
android:title="Mapa"/>
<item android:id="@+id/enviar_alunos"
android:title="Enviar Alunos"/>
<item android:id="@+id/receber_alunos"
android:title="Receber Alunos"/>
<item android:id="@+id/preferencias"
android:title="Preferências"/>
</menu>listagem_alunos.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/lista"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout>
