title: put space between android buttons
body: <pre><code>&lt;Button
      android:id="@+id/o_pharmacy"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:drawableLeft="@drawable/p2"
      android:text="@string/o_pharmacy"
      android:textSize="26sp" /&gt;
  
  &lt;Button
      android:id="@+id/lab"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:drawableLeft="@drawable/lab"
      android:text="@string/lab"
      android:textSize="26sp" /&gt;
  
  &lt;Button
      android:id="@+id/i_pharmacy"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:drawableLeft="@drawable/p1"
      android:text="@string/i_pharmacy"
      android:textSize="26sp" /&gt;
  </code></pre>
  
  <p>I tried above code to display 3 buttons in Liner layout. It works but I need to put space between the two buttons.</p>