Hidding the status and title bar of your application

AndroidManifest.xml:

<activity android:name=".MainActivity"
          android:label="@string/app_name"
          android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen">

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or modify the .java file as follows

//Remove title bar
this.requestWindowFeature(Window.FEATURE_NO_TITLE);

//Remove status bar
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);