Android :: Set Maximum Width Of Linear Layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<EditText
android:id="@+string/urlText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Enter Url Here"/>
<Button
android:id="@+string/go"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Go"/>
<WebView
android:id="@+string/webView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
</LinearLayout>

So with the above android layout, I am not able to make the editbox and button to be to the full width of the container. About 50 px from the left and the right are not filled.