title: android: help creating tablelayout
body: <p>I have a hard time understanding the layout tutorial. I am not able to align columns on different rows. For example, what does 3dip mean in android:padding="3dip". The documentation says "Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), mm (millimeters). ".</p>
  
  <p>Specifically, I want to create a layout with top and bottom two rows, and the middle are lists. And I want the bottom row to stick to the bottom. e.g.,</p>
  
  <hr>
  
  <h2>title1 | title 2| title 3|</h2>
  
  <h2>list 1</h2>
  
  <h2>list 2</h2>
  
  <h2>bottom 1     |  bottom 2  |</h2>
  
  <p>My current xml looks very ugly (without the middle lists)</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  </code></pre>
  
  <p></p>
  
  <pre><code>&lt;TableRow&gt;
      &lt;TextView
           android:layout_width="wrap_content"
            android:gravity="center_horizontal"
          android:text="title 1"
           /&gt;
      &lt;TextView
      android:layout_width="wrap_content"
       android:gravity="center_horizontal"
          android:text="title 2"
  
           /&gt;
          &lt;TextView
           android:layout_width="wrap_content"
            android:gravity="center_horizontal"
          android:text="title 3"            
          /&gt;
  &lt;/TableRow&gt;
  &lt;View        android:layout_height="2dip"        
  android:background="#FF909090" /&gt;
     &lt;TableRow&gt;
      &lt;TextView
           android:layout_width="wrap_content"
            android:gravity="center_horizontal"
          android:text="bottom 1"
           /&gt;
  
          &lt;TextView
           android:layout_width="wrap_content"
            android:gravity="center_horizontal"
          android:text="bottom 2"            
          /&gt;
  &lt;/TableRow&gt;
  </code></pre>
  
  <p></p>