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POAdding Fling Gesture to an image view - Android
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  1. POAdding Fling Gesture to an image view - Android
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    copied!<p>Okay I have been referencing the code here: <a href="https://stackoverflow.com/questions/937313/android-basic-gesture-detection">Fling gesture detection on grid layout</a> </p> <p>but just can not get it to work. In my main activity I have a simple image defined. I want to detect a fling on the image. Here is my code below. The onclick method at the bottom is empty. Is it because of this? I left it blank because in the other code sample its not what I want. I just want a simple toast to pop up saying fling right or fling left.</p> <pre><code>public class GestureRightLeft extends Activity implements OnClickListener { ImageView peek; private static final int SWIPE_MIN_DISTANCE = 120; private static final int SWIPE_MAX_OFF_PATH = 250; private static final int SWIPE_THRESHOLD_VELOCITY = 200; private GestureDetector gestureDetector; View.OnTouchListener gestureListener; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); peek =(ImageView) findViewById(R.id.peek); peek.setImageResource(R.drawable.bluestrip); gestureDetector = new GestureDetector(new MyGestureDetector()); gestureListener = new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { if (gestureDetector.onTouchEvent(event)) { return true; } return false; } }; } class MyGestureDetector extends SimpleOnGestureListener { @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { try { if (Math.abs(e1.getY() - e2.getY()) &gt; SWIPE_MAX_OFF_PATH) return false; // right to left swipe if(e1.getX() - e2.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY) { Toast.makeText(GestureRightLeft.this, "Left Swipe", Toast.LENGTH_SHORT).show(); } else if (e2.getX() - e1.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY) { Toast.makeText(GestureRightLeft.this, "Right Swipe", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { // nothing } return false; } } @Override public void onClick(View v) {} } </code></pre>
 

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