Swipe/Fling tab-changing in conjunction with ScrollView?

Question

The best I could find on this particular issue (although I do not use a Gallery): ScrollView and Gallery interfering - doesn\'t really give a specific answer though. And my

Answer 1

In looking to solve a similar issue I am having, I came across this tid-bit:

eventsInterceptionEnabled: when set to true, this property tells the overlay to steal the events from its children as soon as it knows the user is really drawing a gesture. This is useful when there's a scrollable view under the overlay, to avoid scrolling the underlying child as the user draws his gesture

From the Android Dev site, it talks about using this attribute in the <android.gesture.GestureOverlayView> Root in your layout file.

Answer 2

I would suggest you have a look at the Google I/O 2010 app source code, as their FlingableTabHost implementation would appear to have solved this problem:

http://iosched.googlecode.com/svn/trunk/src/com/google/android/apps/iosched/ui/ScheduleActivity.java

I think the key is in extending TabHost and overriding its onInterceptTouchEvent method.

Answer 3

For what it's worth, I found the onFling method very unreliable. I override the onScroll method in the SimpleGestureDetector, and define my onInterceptTouchEvent as:

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    //Call super first because it does some hidden motion event handling
    boolean result = super.onInterceptTouchEvent(ev);
    if (this.mGestureScanner.onTouchEvent(ev)) return true;
    return result;
}