[Résolu] Intercepter les événements tactiles dans un ViewGroup

public class MyViewGroup extends ViewGroup {

    private int mTouchSlop;

    ...

    ViewConfiguration vc = ViewConfiguration.get(view.getContext());
    mTouchSlop = vc.getScaledTouchSlop();

    ...

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        /*
         * This method JUST determines whether we want to intercept the motion.
         * If we return true, onTouchEvent will be called and we do the actual
         * scrolling there.
         */


        final int action = MotionEventCompat.getActionMasked(ev);

        // Always handle the case of the touch gesture being complete.
        if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) {
            // Release the scroll.
            mIsScrolling = false;
            return false; // Do not intercept touch event, let the child handle it
        }

        switch (action) {
            case MotionEvent.ACTION_MOVE: {
                if (mIsScrolling) {
                    // We're currently scrolling, so yes, intercept the 
                    // touch event!
                    return true;
                }

               
                final int xDiff = calculateDistanceX(ev); 

               
                if (xDiff > mTouchSlop) { 
                    // Start scrolling!
                    mIsScrolling = true;
                    return true;
                }
                break;
            }
            ...
        }

        return false;
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        
        ...
    }
}