title: How do I make a button fill the screen (in width) using relative layout?
body: <p>I am new to android development and I want to make my button cover the WHOLE width of the page with no space on either side. I have researched this and using android weight doesn't work.</p>
  
  <p>Here is the XML:</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      style="@style/AppTheme"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:background="@drawable/background"
      android:icon="@drawable/ic_launcher"
      android:scrollbars="horizontal|vertical"
      tools:context=".MainActivity" &gt;
  
  
       &lt;TextView
           android:id="@+id/textView1"
           android:layout_width="fill_parent"
           android:layout_height="98dp"
           android:layout_alignParentTop="true"
           android:layout_centerHorizontal="true"
           android:background="@drawable/buttonpress"
           android:text="@string/hello_world"
           android:textColor="#228496"
           android:textSize="14sp" /&gt;
  
       &lt;Button
           android:id="@+id/categories"
           android:layout_width="fill_parent"
           android:layout_height="50dp"
           android:layout_below="@+id/textView1"
           android:layout_centerHorizontal="true"
           android:layout_marginTop="14dp"
           android:background="@drawable/buttonpress"
           android:onClick="Categories"
           android:text="@string/title_activity_categories"
           android:textColor="#228496"
           android:textSize="21sp" /&gt;
  
       &lt;Button
           android:id="@+id/feedback"
           android:layout_width="fill_parent"
           android:layout_height="50dp"
           android:layout_alignLeft="@+id/categories"
           android:layout_below="@+id/categories"
           android:layout_marginTop="15dp"
           android:background="@drawable/buttonpress"
           android:onClick="feedback"
           android:text="@string/Feedback"
           android:textColor="#228496"
           android:textSize="21sp" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>