Issue when swipping from a scrolled ListView

[plus-]

I have implemented the xml version on my project and I can observe some kind of conflict beetween the page swipe and the scrolling of a listview.

If I ever scroll the list, I will not be able to swipe consistently to another view.

To be more specific if I scroll the list and then touch it to stop it, I will be able to swipe to another page. But if I scroll the list and let it stop by itself or swipe right after the scroll without a touch, I will not be able to swipe. It will register it like if I was trying to scroll again in the list.

[ysamlan]

If you want to create a fork with your fix (and maybe add a sample activity demonstrating this), feel free, I'd be glad to pull it back in. I'm personally only using this with layouts, not with directly nested ListViews, so I probably won't get around to patching this myself unless I suddenly need it in one of my projects.

[plus-]

I'm not familiar with GIT yet so here is the fix for anyone who encounters the issue:

@Override
       public boolean onInterceptTouchEvent(final MotionEvent ev) {

            final int action = ev.getAction();
            boolean intercept = false;

            switch (action) {
            case MotionEvent.ACTION_MOVE:

                    final int xDiff = (int) Math.abs(ev.getX() - mLastMotionX);
                    if (xDiff > mTouchSlop) {
                            mTouchState = TOUCH_STATE_HORIZONTAL_SCROLLING;
                            mLastMotionX = ev.getX();
                    }

                    final int yDiff = (int) Math.abs(ev.getY() - mLastMotionY);
                    if (yDiff > mTouchSlop) {
                            mTouchState = TOUCH_STATE_VERTICAL_SCROLLING;
                    }

                    //magic sauce!
                    if (Math.abs(xDiff * 2) > Math.abs(yDiff) && xDiff > mTouchSlop)
                            return true;
                    break;

            case MotionEvent.ACTION_UP:
                    mTouchState = TOUCH_STATE_REST;
                    return false;

            case MotionEvent.ACTION_DOWN:
                    mLastMotionY = ev.getY();
                    mLastMotionX = ev.getX();
                    break;

            default:
                    break;
            }

            return intercept;
    }