Remove the title bar from an Android app

To remove the title bar from an Android app, insert the following line in the activity tag of your desired activity in the Android manifest:

android:theme="@android:style/Theme.NoTitleBar"

So an example would look like this:

<activity android:name=".CameraActivity"
android:label="@string/app_name"
android:screenOrientation="landscape"
android:theme="@android:style/Theme.NoTitleBar">
</activity>