How to make a FullScreen Activity on Android
Just add this in your style.xml:
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
Just add this to your onCreate()
method:
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
To make an activity fullscreen put this in your manifest:
<activity android:name=".ActivityName"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"/>
Source: Fullscreen Activity in Android?