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    <p><code>onFling</code> is a method available to members of the <code>SimpleOnGestureListener</code> <a href="http://developer.android.com/reference/android/view/GestureDetector.SimpleOnGestureListener.html" rel="nofollow">class</a>. To override this method you either need to (1) create a class that extends <code>SimpleOnGestureListener</code> or (2) implement a gesture listener within your existing class. Then you can override <code>onFling</code>. </p> <p><strong>Update</strong></p> <p>Sorry for the delay. Here's my implementation. In the activity that you want to use the <code>onFling</code> you need to set up a <code>GestureDetector</code> that uses your custom <code>onFling</code> listener. You can see I'm using a <code>FlingGestureListener</code> the code for which is below. I'm listening for touch on a specific image, peopleTab, but you should be able to substitute any view. </p> <pre><code> final GestureDetector gdt = new GestureDetector(getActivity(), FlingGestureListener.getInstance(tabSwipeListener)); final ImageView peopleTab = (ImageView)getActivity().findViewById(R.id.peopleFlag); peopleTab.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return gdt.onTouchEvent(event); } }); </code></pre> <p>Then for FlingGestureListener I use a separate class that extends <code>SimpleOnGestureListener</code> so I can choose to only implement <code>onFling</code></p> <pre><code>public class FlingGestureListener extends SimpleOnGestureListener { private static final int SWIPE_MIN_DISTANCE = 80; private static final int SWIPE_THRESHOLD_VELOCITY = 50; private static final int PEOPLE_FRAGMENT = 0; private static final int PLACES_FRAGMENT = 2; private OnTabSwipedListener tabSwipeListener; private FlingGestureListener(OnTabSwipedListener tabSwipeListener){ this.tabSwipeListener = tabSwipeListener; } /** * Static factory * @param listener called when tab swiped * @return */ public static FlingGestureListener getInstance(OnTabSwipedListener listener){ return new FlingGestureListener(listener); } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY){ if(e1.getX() - e2.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY){ Log.d("SWIPE", "right to left"); tabSwipeListener.onTabSwipe(true, PLACES_FRAGMENT); //sent int to fragment container to switch pager to that view return true; //Right to left } else if (e2.getX() - e1.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY){ Log.d("SWIPE", "left to right"); tabSwipeListener.onTabSwipe(true, PEOPLE_FRAGMENT); return true; //Left to right } //This will test for up and down movement. if(e1.getY() - e2.getY() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY){ return false; //Bottom to top } else if (e2.getY() - e1.getY() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY){ return false; //Top to bottom } return false; } </code></pre> <p>}</p> <p>I use a callback from this class to indicate when a swipe has occurred. The booleans that are returned are just to indicate whether the whole touch event has been handled. Hopefully this helps.</p> <p><strong>UPDATE 2</strong></p> <p>With the interfaces I am using something specific to my set up.</p> <pre><code>tabSwipeListener.onTabSwipe(true, PLACES_FRAGMENT); </code></pre> <p>this indicates first that a swipe has occurred and in what direction. I use this in a 3 fragment <code>ViewPager</code> set up. From the middle page swiping right goes to a list of places and swiping left goes to a list of people. The PLACES_FRAGMENT constant for example is an integer that refers to the fragment id within the <code>ViewPager</code>. Passing back that integer I can then tell the <code>ViewPager</code> to change to display the fragment at position 2 which effectivtly moves the page. </p> <p>I don't know how to give you a code example because I dont know that this is what you need to do. If you just need to detect a swipe then your interface need only pass back a boolean. If true you will know that the <code>onFling</code> method has been called and whatever threshold criteria you set have been met. You then need to handle that response appropritely within the context of your app. I don't think there is any more advice I can give you. </p>
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    1. POHow to properly implement onFling method?
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    1. COokay,this class implements OnGestureListener.
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    2. COsetOnTouchListener should be called on the view that you are detecting touches from. For example if I were looking to detect touch on an image it would be im.setOnTouchListener(new View.OnTouchListener(){ //override methods here}
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    3. COso in this case I want to set it to the whole touchable area of the activity.I'm guessing I would use: result.setOnTouchListener(new View.OnTouchListener(). Do I place this snippet in my onCreate() to detect?
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