Disabling & Enabling Paging In ViewPager in Android

Question

I am using android compatibility package version 4 for displaying pdf pages in my app. I have used PagerAdapter & ViewPager for displaying pdf pages like horizontal scroll view.

Now the problem is in paging related stuff.I am able to stop paging by detecting childs inside the viewpager according to this thread android: ViewPager and HorizontalScrollVIew, but how can I can enable that back when user touches outside of that view. I have used following code for CustomViewPager.

public class CustomViewPager extends ViewPager {

        private boolean enabled;
        private int childId;

        public CustomViewPager(Context context, AttributeSet attrs) {
            super(context, attrs);
            this.enabled = true;
        }

        public void setChildId(int childId) {
            this.childId = childId;
        }

        @Override
        public boolean onInterceptTouchEvent(MotionEvent event) {
            boolean result = false;
            View scroll = getChildAt(childId);
            if (scroll != null) {
                Rect rect = new Rect();
                CommonLogic.logMessage("PDF Page Rectangle  ", TAG, Log.VERBOSE);
                scroll.getHitRect(rect);
                if (rect.contains((int) event.getX(), (int) event.getY())) {
                    setPagingEnabled(false);
                    result = true;
                }
            }
            return result;
        }

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            if (this.enabled) {
                return super.onTouchEvent(event);
            }
            return false;
        }

        public void setPagingEnabled(boolean enabled) {
            this.enabled = enabled;
        }
    }

When try to touch outside the pdf page then also that if(scroll!=null) becomes true in both orientation.

Can any one help me out how to enable it back so that paging will continue in ViewPager.

Answer 1

I was having a similar problem with paging image files that need pinch to zoom. Simply put Needing a way to disable paging when image is zoomed in and enable it when the whole image is shown. I solved it like this and think you could do a similar thing. First extend : class MyViewPager extends ViewPager {...} And then in that class override following two methods

    @Override
public boolean onTouchEvent(MotionEvent event) {
    if (YOUR_CRITERIA_TOENABLE_DISABLE) {
        return true;

    } else {
        return super.onTouchEvent(event);
    }
}

@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
    return super.onInterceptTouchEvent(event);
}

Be sure to use your view pager in xml layouts or dynamic creation from code.