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POMyGestureDetector extends SimpleOnGestureListener
 

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  1. POMyGestureDetector extends SimpleOnGestureListener
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    <p>I am implementing a MyGestureDetector that extends a SimpleOnGestureListener. I borrowed the class from: <a href="http://www.codeshogun.com/blog/tag/view-flipper/" rel="noreferrer">http://www.codeshogun.com/blog/tag/view-flipper/</a> to allow a swipe action in a ViewFlipper. I can not get if to function on the emulator. Any suggestions?</p> <p>Below is all of the code:</p> <p>The main.java</p> <pre><code>import android.app.Activity; import android.os.Bundle; import android.view.GestureDetector; import android.view.KeyEvent; import android.view.MotionEvent;import android.view.View; import android.view.GestureDetector.SimpleOnGestureListener; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.webkit.WebView; import android.widget.ViewFlipper; public class main extends Activity { 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; private Animation slideLeftIn; private Animation slideLeftOut; private Animation slideRightIn; private Animation slideRightOut; private ViewFlipper viewFlipper; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // ---------------------------------Sets Swipe Animation to Next View --&gt; viewFlipper = (ViewFlipper)findViewById(R.id.AC4313); slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in); slideLeftOut = AnimationUtils.loadAnimation(this, R.anim.slide_left_out); slideRightIn = AnimationUtils.loadAnimation(this, R.anim.slide_right_in); slideRightOut = AnimationUtils.loadAnimation(this, R.anim.slide_right_out); 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) { viewFlipper.setInAnimation(slideLeftIn); viewFlipper.setOutAnimation(slideLeftOut); viewFlipper.showNext(); } else if (e2.getX() - e1.getX() &gt; SWIPE_MIN_DISTANCE &amp;&amp; Math.abs(velocityX) &gt; SWIPE_THRESHOLD_VELOCITY) { viewFlipper.setInAnimation(slideRightIn); viewFlipper.setOutAnimation(slideRightOut); viewFlipper.showPrevious(); } } catch (Exception e) { // nothing } return false; } } @Override // ------------------------------ Catch the Gesture Event by Overriding onTouch() method: --&gt; public boolean onTouchEvent(MotionEvent event) { if (gestureDetector.onTouchEvent(event)) return true; else return false; } </code></pre> <p>The anim *.xml's:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;set xmlns:android="http://schemas.android.com/apk/res/android"&gt; &lt;translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="800"/&gt; &lt;/set&gt; </code></pre>
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    1. COWhat is the behavior?
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    2. COFWIW, I already implemented a `ViewFlipper` with swipe support via a `GestureDetector`: https://github.com/commonsguy/cwac-viewswiper
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    3. COHave you tried it on a device? I'm not sure that the emulator can handle flings. This code looks identical to what I use, and I based mine on the same website that you linked. It works for me on actual devices, but I've never tested it on an emulator.
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