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POHow to override some gesture events over a webview, but let others through?
 

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  1. POHow to override some gesture events over a webview, but let others through?
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    <p>I'm still figuring out the ins and outs of the SDK so bear with me here. </p> <p>So i'm trying to implement a Webview, that keeps multitouch zoom controls and vertical scroll intact (webview class handles them) while locking horizontal scroll on the Webview, and implementing horizontal flings to seek new data.</p> <p>I found this: <a href="https://stackoverflow.com/questions/4229177/fling-gesture-and-webview-in-android">Fling Gesture and Webview in Android</a> . I therefore took this code to understand how to implement this in my app later, so I'm working from there (the answer, of course).</p> <p>And started modyfing the code to my suiting. For example:</p> <pre><code> if (event1.getRawX() &gt; event2.getRawX() &amp;&amp; StrictMath.abs(event1.getRawY()-event2.getRawY())&lt;100) { show_toast("swipe left"); } else if(event1.getRawX() &lt; event2.getRawX() &amp;&amp; StrictMath.abs(event1.getRawY()-event2.getRawY())&lt;100){ show_toast("swipe right"); </code></pre> <p>Actually detects ONLY horizontal flings. </p> <p>However, I have not figured out how to make sure that horizontal flings trigger an action of my choosing, while vertical flings still control the scroll of the WebView in question.</p> <p>My first thought was to try something like pageUp/pageDown or scrollTo on the webview but that can't work since i'm extending the webview class to MyWebView and therefore don't yet have an instanciated object of this type.</p> <p>This is the full code, if needed:</p> <pre><code>package test.fling; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.view.GestureDetector; import android.view.MotionEvent; import android.webkit.WebView; import android.widget.Toast; public class testicules extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); MyWebView webview = new MyWebView(this); webview.loadUrl("http://en.wikipedia.org/wiki/Android"); setContentView(webview); } class MyWebView extends WebView { Context context; GestureDetector gd; public MyWebView(Context context) { super(context); this.context = context; gd = new GestureDetector(context, sogl); } @Override public boolean onTouchEvent(MotionEvent event) { return gd.onTouchEvent(event); } GestureDetector.SimpleOnGestureListener sogl = new GestureDetector.SimpleOnGestureListener() { public boolean onDown(MotionEvent event) { return true; } public boolean onFling(MotionEvent event1, MotionEvent event2, float velocityX, float velocityY) { if (event1.getRawX() &gt; event2.getRawX() &amp;&amp; StrictMath.abs(event1.getRawY()-event2.getRawY())&lt;100) { show_toast("swipe left"); } else if(event1.getRawX() &lt; event2.getRawX() &amp;&amp; StrictMath.abs(event1.getRawY()-event2.getRawY())&lt;100){ show_toast("swipe right"); } else { //MyWebView.pageUp(true); /*can't work, as explained above*/ } return true; } }; void show_toast(final String text) { Toast t = Toast.makeText(context, text, Toast.LENGTH_SHORT); t.show(); } } } </code></pre> <p>Any Help would be greatly appreciated. Thanks!</p>
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