title: How to set separating line's color of GridView on Android
body: <p>I use below code to set line separating the cells of the grid:  </p>
  
  <pre><code>GridView gv = (GridView)findViewById(gridview id);
  gv.setVerticalSpacing(3);
  gv.setHorizontalSpacing(3);
  gv.setAdapter(Adapter);
  </code></pre>
  
  <p>It only set line width, but not show different color.<br>
  How can I do to set different color line?  </p>