How to create a DialogFragment without title?

I'm creating a DialogFragment to show some help messages regarding my app. Everything works fine besides one thing: There is a black stripe at the top of the window that shows the DialogFragment, that I presume is reserved for the title, something I don't want to use.

This is specially painful since my custom DialogFragment uses a white background, so the change is way too notorious to be left aside.

Let me show you this in a more graphical manner:

Now the XML code for my DialogFragment is as follows:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

	<LinearLayout
		android:id="@+id/holding" 
		android:orientation="vertical" 
		android:layout_width="fill_parent" 
		android:layout_height="fill_parent"
		android:background="@drawable/dialog_fragment_bg"
		>
		<!-- Usamos un LinearLayout para que la imagen y el texto esten bien alineados -->
		<LinearLayout
			android:id="@+id/confirmationToast" 
			android:orientation="horizontal" 
			android:layout_width="wrap_content" 
			android:layout_height="wrap_content"
			>
	
			<TextView android:id="@+id/confirmationToastText" 
			android:layout_width="wrap_content"
			android:layout_height="fill_parent" 
			android:text="@string/help_dialog_fragment"
			android:textColor="#AE0000"
			android:gravity="center_vertical"
			/>
		    
		</LinearLayout>
		<LinearLayout
			android:id="@+id/confirmationButtonLL" 
			android:orientation="horizontal" 
			android:layout_width="fill_parent" 
			android:layout_height="fill_parent"
			android:gravity="center_horizontal"
			>    
			<Button android:id="@+id/confirmationDialogButton"
				android:layout_width="wrap_content"
				android:layout_height="wrap_content"
				android:gravity="center"
				android:layout_marginBottom="60dp"
				android:background="@drawable/ok_button">
			</Button>
		</LinearLayout>
	</LinearLayout>
</ScrollView>

And the code of the class that implements the DialogFragment:

public class HelpDialog extends DialogFragment {
   
	public HelpDialog() {
    	// Empty constructor required for DialogFragment
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        //Inflate the XML view for the help dialog fragment
    	View view = inflater.inflate(R.layout.help_dialog_fragment, container);
    	TextView text = (TextView)view.findViewById(R.id.confirmationToastText);
    	text.setText(Html.fromHtml(getString(R.string.help_dialog_fragment)));
    	//get the OK button and add a Listener
    	((Button) view.findViewById(R.id.confirmationDialogButton)).setOnClickListener(new OnClickListener() {
    		public void onClick(View v) {
                 // When button is clicked, call up to owning activity.
    			HelpDialog.this.dismiss();
             }
         });
        return view;
    }
    
}

And the creation process in the main Activity:

/**
 * Shows the HelpDialog Fragment
 */
private void showHelpDialog() {
    android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
    HelpDialog helpDialog = new HelpDialog();
    helpDialog.show(fm, "fragment_help");
}

I really don't know if this answer, related with a Dialog, fits here also Android: How to create a Dialog without a title?

How can I get rid of this title area?

Just add this line of code in your HelpDialog.onCreateView(...)

getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);

This way you're explicitly asking to get a window without title :)

EDIT

As @DataGraham and @Blundell pointed out on the comments below, it's safer to add the request for a title-less window in the onCreateDialog() method instead of onCreateView(). This way you can prevent ennoying NPE when you're not using your fragment as a Dialog:

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
  Dialog dialog = super.onCreateDialog(savedInstanceState);

  // request a window without the title
  dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
  return dialog;
}

Dialog fragment has setStyle method, which should be called before view creation Java Doc. Also style of the dialog can be set with the same method

public static MyDialogFragment newInstance() {
        MyDialogFragment mDialogFragment = new MyDialogFragment();
        //Set Arguments here if needed for dialog auto recreation on screen rotation
        mDialogFragment.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
        return mDialogFragment;
}

FragmentManager manager = getSupportFragmentManager();
SettingsDialog sd = new SettingsDialog();
sd.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
sd.show(manager, "settings_dialog");

Try easy way

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(STYLE_NO_TITLE, 0);
}

Set the style to Theme_Holo_Dialog_NoActionBar:

@Override
public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setStyle(STYLE_NORMAL, android.R.style.Theme_Holo_Dialog_NoActionBar);
}

public class LoginDialog extends DialogFragment {	
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
	    View view = inflater.inflate(R.layout.login_dialog, null);
	    getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
	    return view;
    }	
}