title: adding touch listener for liner layout filled with buttons
body: <p>I added a touch event  to a linear layout to respond to swipe gestures, and it works well. However, when i add buttons to the layout, the parent liner layout is ignored. How should I prevent this from happening?</p>
  
  <pre class="lang-java prettyprint-override"><code>LinearLayout ln2 = (LinearLayout) findViewById(R.id.fr2);
  ln2.setOnTouchListener(swipe);
  </code></pre>
  
  <p>How to i use <code>onInterceptTouch</code>?</p>